My GMC Sierra 2500 is not going into 4 wheel drive I checked the wire going to the transfer case and it seemed fine what can I do or check please help.

My GMC Sierra 2500 is not going into 4 wheel drive I checked the wire going to the transfer case and it seemed fine what can I do or check please help. 1 Answer

89 gmc sierra 2500 5.7 the check engine light blinks rapidly with the engine running or not. What does it mean? 1 Answer

Have replaced plugs, wires, dist cap and rotor, and the pcv valve. Valves clatter on acceleration. Check engine light flashes continuously when ignition is on with engine running or not

I have a 2003 GMC Sierra 2500hd. My fuel pump will not turn on, I have replaced it, tested it and the pump works. I have power to the harness and the fuses and relays are good. Pump will not turn on. 2 Answers

I checked the grounds and voltage they both seem good. I also swapped relays and they are good. I'm stumped.

2004 GMC Sierra 2500 ex cab - battery runs down if not driven 2-3 days..have new battery..has been in shop they couldn't find a problem.I pointed out the little blinking radio light stays on when the truck is turned off.Was told that didn't matter...how can I turn it off and check myself? 4 Answers

Please help with this problem

I HAVE A 2000 GMC 2500 HD THE BATTERY LIGHT COMES ON AND THE TRUCK DIES. IT WILL HOW EVER START RIGHT BACK UP . IT HAS A 6.O IN IT 1 Answer

I HAVE A 2000 GMC WITH A 6.0 IN IT. THE BATTERY LIGHT COMES ON IN THE INFORMATION CENTER IN THE DASH , THE MOTOR DIES IT JUST QUITS NO STUMBLE NOTHING JUST DIES. HOW EVER YOU CAN RESTART THE MOTOR ...