Why is my code reader not working on my 2004 Silverado?

Here I went to read codes in a 2004 Silverado and my tech2 wouldn’t power up. Like the Trailblazers, power to the obd2 port goes through the CIG LTR fuse in the front fuse block. So, verify that you have a blown 15A fuse, and if so, bang in a 15A fuse and you should be good to go.

How to troubleshoot a GM 4.8L 5.3L truck?

The most logical starting point, when troubleshooting a misfire on your 4.8L, 5.3L or 6.0L pickup, van or SUV is testing the COP coils for spark. Why? Because a failed COP coil is usually the reason behind the misfire in the majority of cases. Here are my specific recommendations: Check for misfire codes with a scan tool first .

What makes a GM 4.8l engine misfire?

Now that we’re aware of the core essentials that each engine cylinder needs to run at a 100% power output.. in the next sections I’ll explore some of the specific components that fail and cause a misfire and misfire codes.

Are there any problems with the Chevy 4.8L Vortec?

The two engines tend to have similar problems, but the 4.8 Vortec comes in at a higher reliability rating on our scale due to its lack of AFM, which is known to cause problems on just about every engine it touches. 1. Intake Knock Sensor – 4.8L Vortec

How to troubleshoot a GM 4.8L 5.3L?

You can find this tutorial in Spanish here: Cómo Diagnosticar y Resolver Una Falla en Cilindro (GM 4.8L, 5.3L, 6.0L) (at: autotecnico-online.com ). The core symptom of a misfire is rough idle. This isn’t the only symptom that your GM van, pickup or SUV might experience… here are some more that you might see:

What does it mean when your Chevy won’t start?

My Chevy won’t start sometimes. Only happen now and then. Everything comes on when you turn the key but when you click the key over to start the engine nothing happens. There doesn’t seem to be any certain time or day or reason for the problem.

Why does my Silverado scan tool not turn on?

So, verify that you have a blown 15A fuse, and if so, bang in a 15A fuse and you should be good to go. Keep in mind that this doesn’t tell you why the fuse blew, although 9/10 times using a cell phone charger in one of the 12v acc ports is the cause. Loading…

Is there a 2004 Silverado that won’t start?

I have a 2004 silverado that won’t start. Have bench tested starter and battery and replaced relay and ignition switch. I have a 2004 silverado… I have a 2004 silverado that won’t start.

Why does my Chevy Silverado blower not turn off?

This 2004 Chevrolet Silverado came in with the complaint that the blower motor will not turn off even with the key off. This is relatively common problem of the the full sized Chevrolet, GMC and Cadillac trucks with auto a/c controls. The first step is to lower the passenger side hush panel under the dash.

How to test ignition a on a 2004 Silverado?

See if you have 12 volts to the crank fuse when they turn the switch top the start position, make sure to have them turn the switch to start at leat 5 times with the samr test results. yes, i have 12v on both sides when key is in crank position. And you had 12 volts to fusese ign a and ign E correct? ignition e, yes. how do i test ignition a?

Is there a security light on my Silverado?

There should be an XXXXX XXXXXght that says security. If you do not see this light, then the anuti theft system should be working corerectly. checking. stand by. security light comes on for about 3 seconds, then goes off. Great.

Why do I get No reading on my OBD codes?

Check your fuses to see if any have gone bad. Remember that your car or truck might have more than one fuse box. This should be covered in your owner’s manual or a proper service manual. Another reason for getting no reading is that the scan port has become clogged with dust after years of not being used.

Why is my OBD scanner not working on my GMC Sunfire?

Check your fuses, I can not remember exactly which one,but I have seen multiple times that the OBD port fuse is blown. I know some smaller GM’s (cavaliers, sunfires) are run off the electric seat fuse. The yuppie speaks the truth. Don’t ask me why GM put the OBD port on that circuit……Pull the cover and swap a fuse in that spot.

Why is my OBD2 scanner not communicating with my car?

Each time I have tried scanning my vehicle for codes using the OBDII scanner, there is a message on the scanner stating that it is unable to communicate with vehicle. There are lots of issues with my car, but I am not able to correct them because of the OBDII issues.

What does the VIN number on a Chevy Silverado mean?

Chevrolet SILVERADO VIN decoder Every Chevrolet car has a unique identifier code called a VIN. This number contains vital information about the car, such as its manufacturer, year of production, the plant it was produced in, type of engine, model and more.

What is the OBD2 code for a Chevy?

OBDII Chevrolet Code Definitions. Be sure to double check the codes. Anything P1000 to P1999 or P3000 to P3400 will be Manufacturer specific and may not match the ones listed here. Check specific manufacturer pages on the site, as some of them, we list the OBD2 codes on those pages for those specific vehicles.

What is the serial number on a Chevy Silverado?

Nos. 1 through 9 were used from 2000 to 2009. In 2010, letters were again adopted. 11. Assembly plant; General Motors uses multiple plants for like models. 12-17. The production or serial number assigned to the vehicle.

What is the OBDII code on a Chevy Silverado?

P0301 is a very common OBDII code that occurs in the Chevy Silverado. It stands for: P0301: Misfire Detected Cylinder 1. P0301 is certainly a cause for concern, and can be a threat to the drivability the Chevy Silverado.

What is the misfire code on a Chevy Silverado?

Chevy Silverado P0301 Definition P0301 is a cylinder specific misfire code, which means that cylinder 1 is misfiring and causing the code.

How to check the validity of a Chevy Silverado?

This format was implemented by the ISO institute. Every car manufacturer is obliged to mark all its vehicles in this special format. This online service allows a user to check the validity of the car and get detailed information on almost any VIN number, search for Chevrolet SILVERADO car parts and check the car’s history.