Why is my air conditioning not working on my GMC Sierra?

While there are a variety of reasons your GMC Sierra 1500 air conditioning won’t work, the most common 3 are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.

Why is my Silverado Sierra blower not working?

Additional Info: The resistor makes a clicking sound when the control knob is turned to setting five. Another thread suggested that the contact plug may be burnt and need cleaning/replacing. That would restrict power flow. Got the same problem with mine on 2nd highest setting, gonna look into it in spring.

What should I do if my GM fan won’t turn on?

Pull the negative battery cable and re-install, making sure it is very tight (also check the positive to make sure it is tight). See if this fixes the problem. Many of GM’s AC control heads have a built in reset feature that when power is removed and then applied it will go through a cycle that activates all the vent doors and mode doors.

Where is the mode actuator on a 1995 GMC c1500?

This 1995 GMC C1500 came in with the complaint that the air would blow from everywhere except the front vents. In using the controls, the air flow would adjust from the defrost to the floor. All other functions were okay as well. The mode actuator is located under the driver’s side of the dash, above the gas pedal.

Why is my blower not working on my GMC Sierra?

When you switch to high,the blower motor relay coil circuit is grounded and voltage is now applied directly through the relay to the blower motor; bypassing the resistors. So, I would look to see if the relay is ok. It is a five terminal relay.

Why does my Silverado Sierra not have a fan?

I only use the truck to go to the lumber yard, so I just let it be – until today, when it was 98F and I got stuck in a 10-mile traffic jam (I said many bad words). Dashboard switches appear normal, but a/c clutch does not engage. (Is this properly called a “cycling switch”?) Do not know whether the fan switch was on or off when tested.

What was the problem with my 1998 Silverado Sierra?

One day last year, I started my 1998 C-1500 350 2WD, and surprise – the a/c blew hot air. I said a bad word. I only use the truck to go to the lumber yard, so I just let it be – until today, when it was 98F and I got stuck in a 10-mile traffic jam (I said many bad words). Dashboard switches appear normal, but a/c clutch does not engage.

Why is my blower not working on speed 5?

If your blower is not working on speed 5 then the blow motor resistor (I think its called that) is burnt and you need a new one. It is a 5 minute fix.

What kind of refrigerant does a GMC Sierra 1500 use?

Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system. Most refrigerants include a leak sealer that will seal small leaks in addition to filling the R134a refrigerant. The A/C system in your Sierra 1500 consists of a compressor that is belt-driven, an evaporator and freon.

Why is my GMC Sierra 1500 blowing hot air?

When the air conditioner in your 2003 GMC Sierra 1500 starts blowing hot air, you likely have a freon leak. Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system.

What kind of refrigerant does a 2000 Chevy Silverado use?

Note: a U.S. built 2000 model year truck uses R134a refrigerant, not Freon (R12). OK, you’re on the right track. If the system is fully charged (pressure correct), but the A/C compressor clutch does not engage, the fault is electrical.

Why is my AC not working on my GMC Sierra 1500?

Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My A/C Working? What are common reasons my GMC Sierra 1500 has air conditioning problems?

What to do if your GMC C2500 has a leak?

When the air conditioner in your 1995 GMC C2500 starts blowing hot air, you likely have a freon leak. Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system. Most refrigerants include a leak sealer that will seal small leaks in addition to filling the R134a refrigerant.

Why is my GMC c2500 blowing hot air?

Video Description When the air conditioner in your 1995 GMC C2500 starts blowing hot air, you likely have a freon leak. Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system.

Where did the 2000 GMC Sierra 1500 come from?

1st owner purchased on 03/31/00 and owned in TX until 06/30/04 • 2nd owner purchased on 08/17/04 and owned in TX until 10/17/07 • 3rd owner purchased on 10/17/07 and owned in CA until .

Why does my GMC Sierra turn to high heat?

With the A/C on, the drivers side turns to high heat at intermittent times. When the mileage was low, I’d find a pot hole or large lane marker and the little jolt would turn off the heat. Now we are at full stop, shut it off, remove the key and restart.

Where does the air come from on a GMC Sierra?

Any suggestions on a good repair manual that will cover the A/C systems and circuitry. Air only comes out dash vents. Changing to floor or defrost switch position does not change air flow. I’ve got a problem I got hot air coming out the vents on the driver side,and cold air on the pass.side that includes when im running the air.

What to do if your GMC Canyon heater stops working?

If the heater has stopped working in your Canyon, this process has failed in one way or another. A word of caution: If there is no coolant in your overflow, you can refill it by adding more to the overflow reservoir. There is almost never a situation where you would need to take the radiator cap off of the radiator to add coolant.

Why is my a / C compressor not working on my Chevy Silverado?

This condition may be caused by the A/C compressor clutch cycling out early when the low pressure side reaches approximately 380 kPa (55 psi). The fix is to bring the vehicle to the dealer to have the latest software installed into the vehicle. I hope this helps.

Where is the a / C pressure switch on a Chevy?

Low pressure will destroy a compressor through a lack of oil, and must therefore be repaired as soon as possible. Locate the high- and the low-side switches. The high-side switch is located on the smaller of the two air conditioning lines close to the radiator on the passenger side of the vehicle.

Why does my air conditioner compressor not come on?

There is also a low pressure switch on the line going into the evaporator. If it is faulty or senses low presssure the compressor will not be allowed to come on. That little snowflake that has the cross in it to show when the A/C has been turned off.

What causes the 1999 GMC AC clutch not to engage?

1999 GMC AC Clutch Will Not Engage. What causes the 1999 GMC AC clutch not to engage? We use cookies to give you the best possible experience on our website. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policyunless you have disabled them.

What kind of engine does a GMC Sonoma have?

It boasted of an engine that can reach 150 hp. It also featured a hydraulic clutch system which made it a good choice as an off-road vehicle. In addition, at this early stage, serpentine belts already drive the vehicle, making the engine run smoother together with the other truck functions.

Why does my GMC air conditioner stop working?

For about 5 miles the A/C worked normally till we hit a R/R and the bump made it stop blowing cold air and he was finally convinced. Back to the shop and 30 min later they found the problem. Turned out to be the low pressure switch, (under hood on bottom of small tank) it was corroded and causing a loss of electrical contact.

What kind of clutch does a 1999 GMC Suburban have?

My 1999 GMC Suburban’s AC clutch is not engaging. I bypassed all pressure switches. The relay will not engage. The jump relay and AC works. Submitted:10 years ago. Category: Chevy Show More Show Less Ask Your Own Chevy Question Share this conversation Answered in 18 minutes by: 10/4/2010

Where is the climate control panel on a GMC Sierra?

Check the control panel next in your GMC Sierra. Remove the trim plate bezel surrounding the center instrument panel. Pull of the storage tray and the accessory switch. Unscrew the four screws holding the climate control assembly in place, push in the retaining tabs and pull the control panel out.

How does the AC work in a Chevy truck?

Recharged, cooled great for a while. On my way home, starting getting warm again, turned ac off for 10 mins, turned back on, cooled for 5-10 min then back to warm air. Compressor???? It’s not making any chattering sound or anything obvious.

Why is my air conditioner not working in my Nissan Altima?

Adjust the climate controls. If they are working correctly with the right amount of resistance and stopping at the right places but have no effect on the air then it is probably a simple fuse problem. If they are not working correctly then it is probably a control panel issue.

What kind of climate controls does a GMC have?

You are currently viewing GMC.com (United States). Close this window to stay here or choose another country to see vehicles and services specific to your location. Your GMC is equipped with climate controls that allow you and your passengers to stay comfortable – whether you’re braving the heat of summer or the chill of winter.

Is there a recall on the GM air conditioner?

While GM has reportedly recalled all of its previous faulty inventory stock of the affected parts, no vehicle recall has been issued for those drivers stuck with failing GM air conditioning.

Is it normal for GM air conditioning to blow warm air?

Of course that is normal for a GM truck for the air conditioning to blow warm air, my past 3 GM trucks all had this problem at one point or another. They were still under warranty and the dealership fixed them. Nothing hurts checking the list here first, but I agree with NightRodeo, an immediate call in Monday to the dealer is in order.

Why is my 2014 Silverado AC blowing warm air?

Wife goes to work and calls me says the ac is blowing warm air. Like the vent option is on. I tried resetting battery and no luck. Both set at 65 degrees and feels like very warm air from outside. Anyone had this on there 2014?? If it is a 2014, it should still be under warranty.

Why is my air conditioner not blowing cold air?

A defective relay, compressor clutch coil or damaged compressor are all possibilities. The air conditioning system is equipped with safety switches that automatically turn the compressor off when the A/C refrigerant level becomes low.

Why is my GMC Sierra not blowing cold air?

One of the most inconvenient vehicular problems is when the A/C won’t blow cold air. If your GMC Sierra isn’t keeping you cool, we’ve outlined some of the most common reasons why this might be happening. The only thing that the air conditioning system has in common with the heater is that they both use the climate controls and the blower motor.

When did my GMC Sierra air conditioner stop working?

I had a 2001 GMC Sierra that did this when truck was less the one year old (summer of 2001 is when it was). The dealer had the truck in the shop idling for a long time and the A/C worked perfectly. I told them to take it for a ride and see. So the service manager in an effort to convince me nothing was wrong went for a ride with me driving.

Why does my GMC Sierra 1500 not work?

Why is my air conditioning not working on my GMC Sierra?