2003 GMC Sierra 1500 Questions

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when i first turn the key the light works. when i start the engine, then switch off, then key on, the light may or may not come on. checked connector. is the problem in the instrument cluster or the computer module...
Brought a keyless remote but truck wont allow me to enter program mode!
I PUT A NEW TRANSMISSION IN IT AN A NEW TRANSFER CASE BUT REUSED MY OLD TRANSFER CASE MOTOR BUT ITS STILL SLIPPING ON OF GEAR?
getting fuel but no spark. read question and response for 12/31/2012.....Could it still be pump module??
AC not working so under the hood I removed the relay and crossed it over with a wire and the compressor will run blowing out cold air but won't shun off until I unplug the wire.I tryed a new relay but that is no the p...
When n I use a wire to cross it over it will work.tryed new relay but tha did't work
I put truck on D3 when. climbing a hill then light went om and now no.runnimg car.
This started after trying to determine why the battery would sometimes go down overnight. Had pulled the fuses and relays one at a time and replaced looking for a short. After this it now only turns over but doesn't s...
air only comes out main vents, no defrost or floor when selected. 2003 1500 SLT.
I have the "Service 4wd" light on, selector switch will not change from 2hi to neutral, 4hi, 4lo or Auto 4wd. Tried a new selector switch with no luck. Trying to decide what next to check?
My ABS light and parking brake light only come on when my blower is turned to 1,2,3,or 4 and the blower wont work(no air). But if my blower is turned to 0 both lights turn off. If i turn the blower to speed 5 the blow...
I have turn off the motor and restarting the engine
I changed ignition coil and ICM, but did not help. (I have gas in it). what is the most likely issue for my next step? Distributor?