Category Archives: GMC

GMC truck repair questions and answers. Expert mechanics offer free help, information and advice.


Warm Air From GMC Sierra Vents With A/C On

A/c compressor kicks on when ac is turned on, but no cold air comes out of the vents. You can change which vents the air comes out of. The ac…

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GMC Sierra A/C Clutch | Chevy Malibu Blows Warm Air

2000 GMC Sierra 1500 4.3 Vortec v-6. The clutch went out on my A/C unit. Do I have to replace the whole system or can I replace the clutch and bearing…

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1996 GMC Sierra Heat Defroster Controls Not Working

Live Chat I have a 1996 GMC 3500 Sierra 7.4 Litre. Battery cable came loose, arced and blew fuses. Replaced fuses and all was well. later, when I tried to…

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High Beam Indicator On The Dash Of My GMC 2500

Why is the high beam light on in the dash of my 2004 GMC 2500 pick up when the truck is off and the high beam lever is off. ProTech:…

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1997 GMC Sierra Engine Light And Idle Surge

MY 1997 GMC SIERRA W/350 V8 HAS A DEAD CYLINDER ON #4. SPARK PLUG IS GOOD, WIRE IS GOOD DISTRIBUTOR CAP IS GOOD. WHAT ELSE COULD BE CAUSING THIS DEAD…

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2007 GMC Sierra Burns Oil and Idle Problems

2007 GMC Sierra with 50k miles has started to use oil, could this be a PCV problem? There have been problems with oil consumption on those engines. Mainly a piston…

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2003 GMC Yukon Dash Gauges Not Working- Recall

My 2003 Yukon XL (Suburban) with 5.3 motor and 70k miles has no power to any of dash gauges. The truck runs and operates fine, but the radio, heater controls and…

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1996 GMC Sierra Air Compressor Clicking

Why does my air conditioner compressor engage and click loudly when heater is on. ProTech: The A/C compressor will run when you have the heater on defrost to take the…

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