Why is the transmission slipping on my Chevy Silverado?

The sunshell is damaged. The transmission needs to be replaced or repaired. The 2-4 band is slipping, or servo seals are leaking. Servo seals can be replaced without pulling transmission, or the transmission must be removed for band replacement. No 1st or 4th gear, and transmission shifts from 2nd to 3rd by itself:

Why does my Chevy Silverado shift from 2nd to 3rd gear?

No 1st or 4th gear, and transmission shifts from 2nd to 3rd by itself: The shift solenoid has failed, or there is a wiring problem between PCM and transmission. Replace the shift solenoid located in transmission pan, or check wiring continuity.

What causes a car to slip in the gears?

A faulty torque converter is a very common part that can cause a slipping transmission. The torque converter is the part that is working as a clutch in automatic transmissions. It is filled with transmission fluid, and it is using the fluid to convert power from the engine to torque to the wheels.

What causes the shift solenoid to slip in a car?

The most common problem with the torque converter is that it fails to build pressure to transfer the torque properly and it will therefore cause a slipping transmission. The shift solenoid is electronic valves handling the hydraulic pressure to make shifting in the transmission at exactly the right moment.

Can a worn transmission pump cause transmission slippage?

Worn transmission pump: The transmission pump supplies pressurized hydraulic fluid to the transmission. A pump that is damaged or worn can result in a lack of internal pressure and transmission slippage. You may hear a whining noise, or notice a fluid leak. Solution: Typically, the transmission must be rebuilt or replaced when the pump fails.

Can a faulty solenoid cause a transmission to slip?

Solution: Sometimes, faulty solenoids can be replaced by themselves. Other times, they are integral to the valve body and the entire unit must be replaced. The transmission also could get damaged from the slipping this problem creates. In this case, the transmission may need to be built or replaced.

What causes the clutch to slip on a standard transmission?

Learning to drive on a standard transmission can end up costing you money if you don’t get the hang of it quickly. Then again, clutches slip for reasons not related to wear and tear or abuse. If your input shaft seal is leaking gear oil onto the clutch disc, this could very well cause a slipping clutch.

What to do if you think your clutch is slipping?

If you ride your clutch it may look like this. If you think your clutch is starting to slip, you can try a stall test. Put your car in third gear and try starting off like you would normally, as if you were in first gear. If your clutch is working properly, letting the clutch out all the way should stall the car.

Can a shifting solenoid be replaced on a Chevy Silverado?

A shifting solenoid is pretty easy to replace; although, you have to remove the transmission pan to change them. A general trouble code may show that the transmission is slipping, but not pinpoint what the issue may be. Figure 2.

Are there transmission problems in a 2004 Chevy Silverado?

These trucks are getting older, and it is hitting the point that your 2004 Silverado may be having transmission problems. Below, you’ll find a ton of troubleshooting your transmission problems. The 2004 Silverado was a carryover from the 2003 model year. It is necessary to determine what kind of transmission is in the truck.

Why is my Shift Solenoid not working on my Chevy Silverado?

The shift solenoid has failed, or there is a wiring problem between PCM and transmission. Replace the shift solenoid located in transmission pan, or check wiring continuity. Shift solenoid B failed, or there is a wiring problem between PCM and transmission. No Drive in OD or D, but L2, L1 and R work: The forward sprag is broken.

What kind of transmission does a Chevy Silverado have?

The later Silverados have the newer 6L80E transmission, which can be diagnosed in much the same way. To find out why it is slipping, just open yourself up to learning something new and go for it!

Is the 2012 Chevy Silverado a heavy duty truck?

The heavy-duty Silverado pickup carries into 2012 mostly unchanged, but a few new options have become available.

Why is my Chevy Silverado in limp home mode?

Shift “A” solenoid has failed. Wiring problem from the PCM to the transmission. No 1st or 4th gear (torque converter doesn’t lock, can be driven in 2nd, 3rd, and Reverse gear): Transmission is in “limp home” mode or lost electrical power. Check the under-hood fuse that powers the transmission.

The later Silverados have the newer 6L80E transmission, which can be diagnosed in much the same way. To find out why it is slipping, just open yourself up to learning something new and go for it!

Where did the 2012 Chevy Silverado 2500HD come from?

1st owner purchased on 10/09/12 and owned in TX until 09/01/14 • 2nd owner purchased on 05/12/18 and owned in FL until 03/23/21. 1st owner drove an estimated 5,869 miles/year • 2nd owner drove an estimated 6,527 miles/year.

What to look for when your transmission is slipping?

While you have the dipstick out, look at and smell the fluid. It should be pinkish red and smell fresh. Brown fluid that smells burnt is not good. Check your fluid when it is hot. The acceptable range is called out on the dipstick. Figure 1. Transmission dipstick. If the level is acceptable, go on to Step 2.

What causes a transmission band to slip in a car?

Transmission bands and clutches must engage and release in precisely regulated time for the transmission to perform optimally. Transmission bands can become worn or broken, which will cause the transmission to slip. Bands are what link the gears in the automatic transmission together.

What should I look for in my transmission fluid?

Transmission fluid means everything for your transmission. Checking the level and life of your fluid is the best place to start. While you have the dipstick out, look at and smell the fluid. It should be pinkish red and smell fresh. Brown fluid that smells burnt is not good. Check your fluid when it is hot.

What is the diagnostic code for transmission component slipping?

P0894 is a diagnostic trouble code (DTC) for “Transmission Component Slipping”. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.

What are the symptoms of a Chevy 6.0L TPS failure?

Chevy 6.0L TPS Failure Symptoms 1 Rough idling, stalls at idle, jumping RPM’s 2 Lack of power, acceleration, etc. 3 Engine misfires 4 Irregular shifting

What kind of truck does the 2500HD use?

The classic body style 2500HD trucks used the 4L80E (their actually refered to as a 4L85E) behind the 6.0’s. The D-max and 8.1 trucks use the Allison.

Why does my transmission pump make a whining noise?

It’s why a worn or faulty pump makes a whining noise in all gears, including park and neutral. A restricted or clogged transmission filter makes the same whining noise as a faulty transmission pump.

What does a bad fuel pump sound like?

One of the most common signs that a fuel pump is going bad is a whining sound. The whining sound can indicate that the fuel pump is going out before there are any performance based issues. Keeping an open ear can save you from getting stuck somewhere with a bad fuel pump. It’ll sound like a low frequency buzzing sound.

Why does my Chevy Silverado slip into neutral?

The contact owns a 2004 Chevrolet Silverado. The contact stated when shifting into drive from a complete stop, the transmission would slip into neutral. The contact would attempt to accelerate but the vehicle was resistant. When removing his foot from the brake, the vehicle would independently roll backward.

Why is my fuel pump making a noise?

The noise was coming form the fuel tank and it was not a wining fuel pump nose it was more like vibration noise. We took it apart and we noticed that it was our mistake. We did not install the rubber bushings on the bottom of the fuel pump assembly and the fuel filter was not in place.

How to troubleshoot a transmission problem in a Chevrolet?

1 Symptoms. The first sign that you may have a possible transmission problem could be the check engine light coming on. 2 Troubleshooting Steps. The first steps in troubleshooting the Chevrolet transmission problem are to read the fault codes from the Transmission Control Module (TCM) and check the transmission fluid level. 3 Common Problems. …

What causes a Chevy truck to not move?

Chevy doesn’t move – When you put your Chevy car or truck in Drive or reverse, it may not move all. Common problems include no transmission fluid, failed transmission fluid pump.

Are there any problems with the Chevy Silverado 1500?

Check out our Chevrolet Silverado 1500 overview to see the most problematic years, worst problems and most recently reported complaints with the Silverado 1500.

Do you need to replace the transmission on a Chevy Silverado?

The 3rd-4th clutches are worn out. The transmission needs to be replaced or repaired. 1st and 3rd only, but no 2nd, 4th, or reverse: The sunshell is damaged. The transmission needs to be replaced or repaired.

What are technical service bulletins for 2015 Chevy Silverado?

Technical Service Bulletins (TSBs) for the 2015 Silverado 1500 are official communications between Chevrolet & their dealerships that describe processes for troubleshooting or fixing certain common problems. All vehicle manufacturers are required by U.S. law to make their TSBs available to the public.

What was the problem with my Chevy Silverado transmission?

It is a normal chevy issue I must deal with Differential went out – repaired by dealer at owner’s expense. Transmission went out immediately upon return. Transmission replaced and went out again a week later. Transmission replaced again, at owner’s expense. Small leak at transmission pan so had tranny fluid and filter changed while pan was off.

What do I need to lower my Chevy Silverado?

Lower your 2014-18 Chevrolet Silverado 1500 / GMC Sierra 1500 2WD with our new lowering kit. This kits gives a 2″ front and 3″ rear drop and comes with front coils, rear shackles, bump stops, U-bolts, and hardware. For those that want to go even lower, grab this new kit from Ground Force!

What do you need to know about a Chevrolet transmission?

Each transmission kit is engineered with factory-matched torque capacity ratings, helping ensure the transmission you purchase will stand up to the power of your engine. Subscribe to receive monthly email communications such as news, offers, and more from Chevrolet Performance.

Why is my Trans bad on my 4L60E?

Trans seems noisy when moving in 1st and Reverse, noise goes away instantly if you shift to N or the transmission goes into 3rd gear: Reaction planetary is worn out due to high miles or insufficient lubrication. Not a critical failure, but not a good sign either.

What can cause a transmission solenoid to slip?

If the fluid is low, worn out, or has burned, you should consider getting a fluid flush. Take of the transmission fluid and your transmission will operate for a really long time. A defective solenoid can cause the transmission to slip. What’s a transmission solenoid?

What to do when your transmission starts slipping?

First, check the fluid level to make sure it is full. If it is low, bring fluid level to full and see if that helps. About all the owner can do with slipping automatics is trying a transmission fluid and filter change to see if transmission revives and stops slipping.

What happens when you slip the transmission on a Chevy S10?

When this happens, the tachometer jumps up as the RPM increases. Smell – As the clutches and bands inside the transmission slip, they create a lot of friction. This friction gets them hot and you may notice an egg-like smell.

What causes a car’s transmission to start slipping?

Here are some reasons your transmission is slipping. 1 Low, worn out or burned transmission fluid 2 Solenoid problems 3 Worn or broken transmission bands 4 Clutch problems 5 Worn out gears 6 Torque converter issues More

What is the shifting solenoid on a Chevy S10?

The shifting solenoid on a Chevrolet S-10 pick-up is designed to regulate when the transmission shifts. This solenoid is part of the electronic transmission control system, and is controlled by the powertrain control module, or PCM. The PCM actuates the shifting solenoid when it determines that an upshift or downshift is required.

What can I do to prevent my transmission from slipping?

To prevent your transmission from start slipping, you need to maintain your car and the transmission properly. The easiest way to prevent transmission from slipping is to change the transmission fluid and filter often or after your specific car model’s specified schedule.

What kind of transmission does a Chevy truck have?

THM700-R4 – 4 Speed transmission used in GM cars and light trucks with the 2.8, 3.1, 4.3, V6, Chevrolet built 305, 350 and 454 engines from 1982 to 1992.

What are the symptoms of a slipping transmission?

Symptoms of a Slipping transmission 1 High RPMs 2 Slow & Delays in acceleration 3 Shifting problems 4 Grinding noises from the transmission 5 Check Engine Light or Transmission light 6 Burnt smells More

Is it OK to drive a car with a slipping transmission?

It is not recommended to drive your car with a slipping transmission. When the transmission is slipping, it will cause a lot of heat in the transmission fluid, which may burn and damage many other expensive parts in your automatic transmission.

Why does my Chevy transmission not go into 3rd gear?

Chevy transmission won’t shift, stuck in 1st gear or limp mode – Speedometer may also display zero at all times. It could be internal transmission failure, low transmission fluid, or faulty Vehicle Speed Sensor (VSS sensor). Chevy transmission won’t go into 3rd or 4th gear – This is a good indication that 3 or 4 gear clutches are worn.

What happens if your Chevy transmission is out of fluid?

Low transmission fluid causes most Chevy transmission problems, including harsh shifting, delayed shifting, and no shifting if there is a total loss of transmission fluid. If your Chevy transmission is low or out of fluid, avoid running or driving until the transmission fluid level is corrected to avoid unnecessary transmission damage.

Why is my Chevy transmission not working properly?

Here is a quick overview of Chevy transmission problems and possible causes. Chevy transmission slipping or no reverse – Reverse clutches may be worn out a fluid leak, or a broken sun shell. Won’t shift to higher gear until you let off the gas – Faulty throttle position sensor. A leak in the servo assembly or accumulator.

What happens when you step on the gas and your transmission is slipping?

Here’s Why, and What to Do You step on the gas pedal, but something’s wrong. The engine revs, but the car doesn’t go faster. This happens when your transmission is slipping. Transmission problems often result in a big repair bill, so you start worrying.

Why does my Chevy Silverado have engine problems?

That’s not the end of the 5.3 Chevy engine problems, unfortunately. We all know how important engine maintenance is to long-term vehicle health. If the 5.3-liter engine doesn’t receive oil changes on time, sludge can quickly build up on internal components. This sludge is a gooey, sticky black tarlike substance that plugs everything up.

What kind of transmission does a Silverado 1500 have?

When diagnosing a shudder vibration condition on some 2016-2018 Silverado, Sierra; 2016-2020 Tahoe, Suburban, Yukon; 2019-2020 Silverado 1500 and Sierra 1500 models equipped with 5.3L V8 engine (RPO L82, L83, L84) and 6L80 6-speed transmission (RPO MYC), it’s critical to determine the source of the vibration in order to make the proper repairs.

Why is my Chevy Silverado not 4 wheel drive?

Over time, dirt, moisture and corrosion can affect the contacts on the bolts used to attach the wires to the frame. If you have a 2008 Chevy Silverado with 4-wheel drive problems, or a similar GMC or Chevy truck from another model year, replacing the switch will solve the issue.

What causes the gears to slip in an automatic transmission?

Low fluid level: Automatic transmissions depend on pressurized hydraulic fluid. A low fluid level can result in lack of pressure, preventing the gears from engaging like they should. This often results in transmission slippage. Solution: A transmission doesn’t “burn” fluid the way an engine can burn oil.

What kind of transmission does a Chevy 1500 have?

2000 Chevy 1500 4WD Automatic Transmission: While driving, transmission quits working completely until I turn it off, then restart it, and then it works briefly again, then the transmission stops working again, it revs, but doesn’t engage. 213k miles. Nothing has been changed or added since we bought it.

Chevy doesn’t move – When you put your Chevy car or truck in Drive or reverse, it may not move all. Common problems include no transmission fluid, failed transmission fluid pump.

Why does my Trans not shift out of first gear?

Trans will not shift out of first gear, brake and ABS dash lights on. Check perameters with scanner, no codes, VSS at 3mph all the time, spedo not working, at 0mph all the time. Trans tailshaft housing was replaced because of oil leak, vss wire pinched on install, and has been repaired. Pinched wire was checked in harness for any problems.

Can a sunshell be replaced without pulling transmission?

1st and 3rd only, but no 2nd, 4th, or reverse: The sunshell is damaged. The transmission needs to be replaced or repaired. The 2-4 band is slipping, or servo seals are leaking. Servo seals can be replaced without pulling transmission, or the transmission must be removed for band replacement.

What causes a car transmission to slip and burn?

You may hear a whining noise, or notice a fluid leak. Solution: Typically, the transmission must be rebuilt or replaced when the pump fails. That would be an expensive repair. The lack of pressure created by the faulty pump causes the transmission clutches and bands to slip and burn.

These are the most common causes of transmission slippage: Get it diagnosed by a professional Low fluid level: Automatic transmissions depend on pressurized hydraulic fluid. A low fluid level can result in lack of pressure, preventing the gears from engaging like they should. This often results in transmission slippage.

How is the transmission on a Chevy Silverado controlled?

The transmission in your truck is controlled by the PCM (powertrain control module). It is sophisticated enough to be able to tell you if there is an issue with your transmission. The local auto supply may be able to scan it, but it may take a better scanner to dive deeper into the PCM.

What causes a car to not have overdrive?

The most common problem that is a false flag for the loss of overdrive would be when the torque converter fails to lock up. When the torque converter doesn’t lock the vehicle will travel at a higher rpm down the highway.

What causes a Chevy Silverado engine to surge?

My 1999 silverado with the 5.3 engine. the motor will occasionally surge at crusing speeds between 40 and 60 mph. I figured out how to induce it by letting off the gas and quickly giving it 1/4 throttle and about half the time this will cause the engine to surge.

Why does my car make a knocking sound when I open the door?

When you start the car, or just the AC system, and notice a knocking sound like someone tapping on your door, that is indicative of a problem with the blend door actuator. Inconsistent Airflow: If the blend door is moving back and forth, then the airflow will be diverted incorrectly or maintained incorrectly.

Why does my Chevy Silverado make a popping noise when I Turn Left?

Models: 2014 Chevrolet Silverado 1500 2014 GMC Sierra 1500 Condition/Concern Some customers may comment on a popping noise heard from the front of the vehicle while steering left or right, specifically near the steering gears full left or full right steering position. This condition may be caused by the steering gear shaft dampener rings.

What happens if the speakers on my Chevy truck go bad?

Most of the time, broken speakers mean a lack of convenient entertainment while driving, but they could potentially cause safety issues, as they could prevent you from using OnStar if all of them were to go. The way to fix this issue is to replace the speakers. If you want a quick fix, you can buy a cheap set of speakers.

What causes a grinding noise in a Chevy transmission?

Transmission grinding noise – sun shell (planetary gears) may be damaged. Chevy will drive in 1st and 3rd only but not 2nd or 4th gear – Sunshell may be damaged, or splines are sheared off, servo seals may be worked out, bands themselves could be worn out.

What causes a clunking noise on the driveline?

Cause: Bad wheel bearings Noise: Driveline squeaking or grinding at any speed Cause:Worn or damaged U-joints Noise: Clunking when depressing the throttle pedal (takeoff) Cause:Worn U-joints; worn spider gears; worn axle splines; excessive gear backlash; loose yoke splines; worn slip yoke splines Noise:Clunk immediately after taking off from a stop

Why is my Chevy Suburban transmission not working?

If the stratgy does not change when pressed then there is either something wrong with the switch, a loss of power or an open wire. hard to say exactly without a scanner and further diagnosis…sorry. Check all fuses, inside and outside..who knows , you might get lucky. All anbody has said is to check fuses.

What’s the transmission on a 1998 Chevy Suburban?

I have a 1998 Chevy Suburban 4×4 with the 5.7 and the transmission is the 4L60E…we are on our 3rd rebuild of this transmission within 9 months, the first rebuild lasted 6 months, thought to be faulty converter, 2nd rebuild lasted about 1 month, 3rd one lasted less than a week, 488 miles to be exact.

What are the symptoms of a bad transmission speed sensor?

Symptoms of a Bad or Failing Transmission Speed Sensor. 1 1. Harsh or Improper Shifting. Without a valid speed signal from these sensors, the PCM will not be able to correctly control the shifting of gears 2 2. Cruise Control Does Not Work. 3 3. Check Engine Light Comes On.

What makes a 2000 Chevy 4.3 truck not start?

7,686 satisfied customers 2000 Chevy 4.3 truck start won’t start runs little rough 2000 Chevy 4.3 truck start won’t start runs little rough fuel pump new think it’s fuel pressure regulater … read more Roy Belding 7,686 satisfied customers

What are the symptoms of a bad cv shaft assembly?

1. Loud clicking noises when turning. One of the most common and most noticeable symptoms of a bad or failing CV axle shaft assembly is an audible clicking noise when turning.

Why does the transmission slip when the engine warms up?

Car drives fine for a while but it seems the slipping starts when the engine is hot. if i come to a complete stop at the light and push gas to drive again it slips for few seconds then dries fine. Clicking this will make more experts see the question and we will remind you when it gets answered.

Why does my GMC transmission not go into gear?

Transmission will not go into gear when warmed up gears t… I put Lucas in the transmission because it was low on transmission fluid and was slipping in over drive then it stopped working at all after I put Lucas in it but when I first start it will go into gear and work fine until I get up the street then lose all gears how can I fix this

What causes a Chevy transmission to not shift?

Low transmission fluid level. Chevy transmission won’t shift, stuck in 1st gear or limp mode – Speedometer may also display zero at all times. It could be internal transmission failure, low transmission fluid, or faulty Vehicle Speed Sensor (VSS sensor).

Why does my transmission slip when the engine gets hot?

It isn’t when the engine gets hot, it is when the transmission fluid gets hot that the slipping starts, due to wear of the clutches and gears inside the transmission. First, check the fluid level to make sure it is full. If it is low, bring fluid level to full and see if that helps.

What causes a transmission to slip in reverse?

These issues commonly can cause your transmission to slip. See if they apply to you and see what the solution is. Slow, slipping, or no reverse: You have a broken sunshell, or circuit issue in the valve body.

Is there a transmission cooler for a Chevy Silverado?

Transmission Cooler ($49.99) This is a Chevrolet Silverado 1995-1997 Rebuilt Transmission 4L60E . Transmission like new with all OEM updates and includes a torque converter and a 5 Year Unlimited Mileage Warranty . No core charge.

Can a servo seal be replaced without pulling the transmission?

Servo seals can be replaced without pulling transmission, or the transmission must be removed for band replacement. No 1st or 4th gear, and transmission shifts from 2nd to 3rd by itself:

What causes transmission problems on Dodge Ram 1500?

Here is a comprehensive guide on problems you might experience with the dodge ram 1500: 01. No heat One of the leading causes for Dodge Ram transmission problems can be a heat a problem. But why is it? If the coolant has some dirt residue—all the dirt will eventually stop the flow of the coolant.

How much does it cost to replace a transmission on a Dodge Ram 1500?

To replace a transmission, you should expect to pay all the way from $3,800 to $8.100. On the other hand, to repair a damaged transmission: it will cost about $1,800. But if you need to rebuild the current transmission, you will have to pay about $3.100.

What should you do if your automatic transmission is slipping?

If your car’s automatic transmission is showing signs of slipping, then you should have it checked right away. What might seem to be a minor annoyance can turn into a bigger, more expensive problem down the road. Transmission slipping does not always mean your transmission is going to fail, but it is a signal that maintenance is required.

What kind of transmission is in the 93 Silverado?

93 silverado C1500 5.7 litre 350 2WD extended cab. After extensive research on line I have been told this truck takes a 700R4, 4L60, 4L60E, and a 4L80E I can’t seem to find a consensus and I want to order a replacement online and don’t want to have to return it because I ordered the wrong transmission.

How to fix a GMC Sierra 1500 transmission?

Yes that’s has happen to two of my 93 Chevy Silverado 4×4 , 1 and 2 fine then free wheel in overdrive. Just change 1-2 – 3-4 solenoids first and if that doesn’t work change the computer per Ebay it’s the cheapest. Hope this helps JJD 36 people found this helpful. My buddy changed his distributor and cured the tranny problems.

What to do if your Chevy Silverado goes out of gear?

Enter the vehicle and put the transmission in gear. If there is a clunking sound as you do this, the transmission mounts may have failed. Drive the Silverado for a short time. If the transmission slips out of gear while driving, the clutch or torque converter may have failed and it will need to be taken to a qualified automotive mechanic.

How can I tell if my Chevy transmission is leaking?

Move the Chevy vehicle from its parked spot. If there is any red fluid on the ground, then the transmission is leaking. If the engine is cool, remove the radiator cap. Check the fluid for a reddish-brown oily residue floating in the coolant. If there is, the transmission cooler is leaking and needs a replacement.

What happens when your transmission slips when you press the gas pedal?

When the transmission slips, it might feel like the vehicle is slow to respond. Sometimes it doesn’t respond at all when you press the gas pedal. The noticeable change in the transmission’s performance might be accompanied by a noise or change in pitch as it changes gears.

When did GM stop using the automatic transmission?

Through the 1950s, all makers were working on their own automatic transmission, with four more developed inside GM alone. All of GM’s early automatic transmissions were replaced by variants of the Turbo-Hydramatic by the 1970s. 1940–1967 Hydra-Matic — Oldsmobile (now the trade name for all GM automatic transmissions)

What was the third type of GM transmission?

A third variant was the light-duty rear wheel drive Turbo-Hydramatic 180 used in many European models. 1969–1998 TH180/TH180C / 3L30 — 3-speed European/Asian model.

What kind of transmission does a 1994 GMC Sierra have?

I’ve got a 1994 GMC Sierra 4X4 5.7 I purchased from an older couple. It has been sitting a year. She said years ago they had tranny trouble; it would stay in low.

Why is my GMC Sierra 1500 in 3rd gear?

Pulled the harness off the tranny to put it into LIMP mode and it starts out in 3rd gear no problem. So 3rd gear is there.. Shift solenoids A and B have to be good else no 1st or 2nd. No errors codes.

Why is the transmission slipping on my Chevy Silverado?