How can I Fix my GMC Sierra gauges?
First have the computer scanned for trouble codes and as for the gauges first check the fuses and relays then if they are good then you will have to replace the instrument cluster because they are well known for being faulty. THE SERVICE PROCEDURE IN THIS BULLETIN HAS BEEN REVISED.
Where is the fuse block on a GMC Sierra?
The fuse block access door is on the driver’s side edge of the instrument panel. Pull off the cover to access the fuse block. Instrument Cluster, DRL Relay, Lamp Switch, Keyless Entry, Low Coolant Module, Illuminated Entry Module, DRAC (Diesel Engine)
Is there a relay switch for a 2003 GMC Sierra?
2003 GMC Sierra. The gauges do not work. All the lights on the panel work, just not the gauges. Is there a relay switch that pertains to the cluster?
What should I do if my gauges are not working?
The first step in diagnosing this type of issue is to identify the fuse associated with the instrument cluster or gauges. The fuse should have power on both sides when the ignition key is turned to the on position.
The fuse block access door is on the driver’s side edge of the instrument panel. Pull off the cover to access the fuse block. Instrument Cluster, DRL Relay, Lamp Switch, Keyless Entry, Low Coolant Module, Illuminated Entry Module, DRAC (Diesel Engine)
Why are my gauges not working on my GMC Sierra?
Of course they couldn’t read it with a scanner when it wasn’t working, there was no communication on the Class2 data line. This isn’t something you’re going to fix poking and prodding, and you may even do more damage. The dealer is the best bet to diagnose this, it could by any of the dozen or so modules causing this problem or any of the wiring.
What should I do if my GMC Sierra horn is not working?
First, supply power directly to the horn, bypassing the horn switch, horn fuse, clock spring, and horn relay. If the horn honks, that confirms you’ve got an electrical problem somewhere else. Next supply power ground the tan wire for the horn relay behind the clock spring. That ground wire goes to the control coil in the horn relay.
Why is my test light not working on my GMC Sierra?
Of course it would cause it to quit, the test light would pull the data line down and kill communication. Of course they couldn’t read it with a scanner when it wasn’t working, there was no communication on the Class2 data line. This isn’t something you’re going to fix poking and prodding, and you may even do more damage.