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Prev Professional Automotive Repair Technical Discussions for July 31, 2013
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Open Help Requests for GM
Help Request Answers
2003 Cadillac Escalade 6.0L Hydroboost VIN: 1GYEK63N43
I have this Escalade with hydroboost power assist, with RPO JL4 active brake control. The complaint is the pedal is soft and goes to floor. Vehicle stops fine and brakes check out okay. No abs light, but I do have a code in history - C0279 for pre-charge pump ...
2004 Chevrolet Tahoe LS 5.3L Rear Seat Audio And Hvac Controller VIN: 1GNEK13Z24
The rear hvac control module will not stay on. When it comes on it will display off and then display will go out.the radio part of the controller works fine.our scan tool sees the rear hvac module data when i press the rear temp switch or mode select. Unplugge...
2005 Chevrolet Tahoe LS 5.3L center vents VIN: 1GNEC13TX5
Hi guys, need some help from chevy gurus out there. This Tahoe won't blow air through center vents. It's stuck on side vents and that's what shows on the climate control panel; meaning the side arrows are always on and then it will switch through other modes b...
2005 Chevrolet Corvette 6.0L drive shaft VIN: 1G1YY24U05
we have a 2005 corvette auto trans that had a rattling noise from the driveline support area. The customer hears it in the car stopped in drive or park. The prop shaft coupling nut was loose per GM PIP 4466 bulletin. We tightened that and replaced the bearings...
2008 Chevrolet Express 3500 6.6L Fuse #44 underhood fuse block. VIN: 1GBJG31668
Bus came to me with complaint of no shifting, brake warning lights on, and gear indicator light out. Found fuse #44 in underhood fuse block blown. Fuse is B+ supply for TCM and nothing else as far as I can gather from GM schematic. Replace fuse, go for a ride....
2004 GMC Sierra 1500 SLE 4.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTEC14V64
misfire on 2 5 7 8 installed new plug and wires and intake gaskets now mis on 5 7 checked throttle and was at 14% should be at 5.5% changed throttle now 5.5% still mis on 2 7 need help Trouble codes: P0300

Fixes & Summaries for GM
Fix/Summary Answers
2000 Cadillac Eldorado ESC 4.6L Misfire VIN: 1G6EL12Y0Y
Finally finished. Although I could not see a crack in the intake or see any smoke escaping everything cleared up as soon as I sprayed carb spray on the top of it. Must have been porous in some way. A new intake and all was good. Thanks to all who offered help... Trouble codes: P0300 (Random cylinder misfire).
2007 Cadillac CTS 2.8L Driver window VIN: 1G6DM57T27
Hello and thank you for all of your replies. Here was the fix. What was happening when the up or down for the driver window was pushed I would lose voltage to the door module. In the wiring diagram there is a Splice #303 that I could not find in NO DATA. After...
1997 Chevrolet C3500 Cheyenne 6.5L ecm b VIN: 1GBKC34F1V
thank to all I replace the trasf pump is all good. I will run the truck in idle all day and no problem driver will take and fuse will blow bad fuel pump
2005 Chevrolet Malibu LS 3.5L No Start, Cuts out VIN: 1G1ZT54875
we replaced the charcoal canister and vent valve. have not had an issue since. the fuel was backing into the canister on fill up. the purge valve would then suck the raw fuel into intake causing driveabilty issues.
1997 Pontiac Bonneville SE 3.8L fuel pump/ guages VIN: 1G2HX52KXV
I had alot of good info from the techs who tried to help. The vehicle left yesterday and went to scrap as the wiring harness was cut in two by the engine installer. The customer did not want to keep throwing money at it when he saw how many places the harness ...
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