My 1994 gmc sierra does not blow any air through the vents. the buttons are working but no air is comming out? Any thoughts on where to start?

My 1994 gmc sierra does not blow any air through the vents. the buttons are working but no air is comming out? Any thoughts on where to start? 2 Answers

I have a 1989 GMC Sierra 2500. within the past few weeks, my heater has started blowing cold air. But, it doesn't constantly blow cold air. It goes back and forth between hot and cold. Does this mean my heater core is bad, or may it be another problem? 3 Answers

I have a 1989 GMC Sierra 2500. within the past few weeks, my heater has started blowing cold air. But, it doesn't constantly blow cold air. It goes back and forth between hot and cold. Does this mean ...

Sierra Will crank but not start 1 Answer

My K2500 Sierra will crank but not start. I tested the fuel pump and it was not getting full pressure so I replaced it. After that it still won't start. I have replaced the fuel pump, filter, Igniti...

have an 03 gmc sierra 2500hd has 276000 miles on it did cylinder contribution test all cyl. came uo about the same no real diffrences but smokes at all times with no loss of power does have tuner 1 Answer

smokes at all times but runs good no injector codes contribution all pretty typical 678 to 681

1994 GMC K2500 Brake lights don't work!! 2 Answers

I have a 1994 GMC K2500 that keeps blowing the STOP fuse when I press on the brake pedal. Even with a new brake light switch. Checked wiring- seems good-at least at the junctions and at the front a...