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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 21, 2014
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Open Help Requests for GM
Help Request Answers
1999 Chevrolet Express 3500 5.7L ECM Fuse 1 VIN: 1GBJG31R8X
I have this GM 5.7 here. It has a short to ground that blows ECM 1 Fuse. I tried tracing and unplugging numerous parts to make the short go away. Finally realized when I unplug one of the Oxygen sensors the short doesn't go away but the resistance increases. B...
2000 GMC Sierra 1500 SL 4.8L backup lights VIN: 1GTEK14V5Y
this a well maintained truck.but backup lights donot work and owner has no idea when they quit. I am not an electrian and avoid it .I have checked bulbs,cannot find any bad wires.there is no power coming out of main plug in rear.or going into plug.trans was re...

Fixes & Summaries for GM
Fix/Summary Answers
2011 GMC Sierra 3500 HD WT 6.6L Excessive Emissions VIN: 1GD322CL1B
The "fix"for this truck ended up being purchasing GM's [...] program that will allow emmulation of the the tech 2 scanner on a laptop, using the factory tool once again proved to be right answer. Tests ran through fine and cleared the exhaust fluid poor qua...
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