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Prev Professional Automotive Repair Technical Discussions for August 16, 2011
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Open Help Requests for GM
Help Request Answers
2002 Cadillac Seville STS 4.6L Defrost VIN: 1G6KY54912
Customer states that the HVAC won't go into defrost mode (windshield vents) Verified complaint. Did a hard reset by removing the instrument cluster fuse, and agian disconnecting the battery. The servos were never removed from the case during the eveaporator jo...
2005 Cadillac STS 4.6L Poor Idle Quality, MIL Lamp on VIN: 1G6DC67A35
car came in with sensor not mounted and gasket missing replaced parts and code still there checked wires and all check good pluged in pcm now has code p2119 this code was not there before iam leaning to a bad pcm thanks for any help Trouble codes: P0102, P2119
1999 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W6X
ok came in for check engine light po171& biggie found vacuum hose at intake next to pcv valve busted and also found another hose by cruise and abs pump that was busted so while i was attempting to change that one a small hose came off somewhere in th... Trouble codes: P0171, P0174
2000 Chevrolet Silverado 1500 LS 5.3L Brake Warning Indicator VIN: 2GCEK19T9Y
A few months ago the wiring on the ABS Pump motor corroded off. Amber ABS light was on but Customer did not want fixed. Two weeks ago, truck is back with amber ABS light on AND the red BRAKE warning light on. When the truck is started the BRAKE light flashes, ...
2002 Chevrolet C3500 HD 6.5L Hesitation, Surge, Cuts out, Stall VIN: 3GBKC34F92
The truck is a 3500hd diesel bucket truck. Randomly the truck will start to hesitate and stall out. We noticed that it will happen after a left hand turn and if you back off on the gas pedal it will come back and wont stall.
2003 Chevrolet Silverado 1500 5.3L No Start, Stall VIN: 2GCEC19TX3
This truck came in on the hook yesterday for a no start. Died at redlight and would not restart. Started down flow chart and did not have rpm signal on scanner. Removed starter to check wiring at crank sensor and did not have 12v igntion ref coming from PCM. W...
2005 Chevrolet Suburban 1500 Z71 5.3L audio VIN: 3GNFK16Z35
This vehicle has the UQ7 uplevel navigation stereo WITHOUT the Y91 luxury amplifier. The head unit powers up but I have no sound. Alldata is a little vague about audio in general. How do I test the head unit output to the amp?? I put my Modis on the output w...
2006 Chevrolet Express 3500 6.6L glow plug VIN: 1GBJG31246
any tips on removing broken glow plug in cylinder hesd
2006 Chevrolet Silverado 1500 LT 5.3L Cooling Systems VIN: 1GCEK19BX6
I have this 06 Silverado that my customer states smokes white on start up. It does not smoke in the morning. It does it when he drives for awhile then lets the truck set for about a half hour or so then restarts it, but doesn't do it all the time. He couldn't ...
2005 GMC Sierra 2500 HD 6.0L Differential VIN: 1GTHK24U35
leaking gear oil from front diff left output seal i can not get the output shaft out from the diff any tips? thanks mark
1991 Oldsmobile Cutlass Supreme 3.1L No Start, Cuts out VIN: 1G3WH14T9M
thanks for the help , the car has weak injector pulse,no start, good spark,fuel presure is good too,got running a couple of times ,then no start , its got rpm reading, repaired some wires under power steering pump, look for more broken wires but nothing.and i ...
1992 Oldsmobile Cutlass Supreme 3.1L Stall VIN: 1G3WR11X3N
This vehicle came to us with the complaint that it will stall at idle intermittantly. It initially had code 35 in it for Iac error. I found a vacuum line had fallen off and created a vacuum leak about 1/4 inch in diameter. Erased the code and test drove and ve... Trouble codes: 35 (iac error)
1999 Pontiac Grand Am SE 2.4L Cruise control VIN: 12NE52T2XM
The cruis control on this vehicle does not work. I have performed all the work on the mitchell flow chart. I have power at the cruise control module. Everything apears to work correctly except the cruise will not work. I have also changed the pcm per the mitch...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Chevrolet Caprice Classic 4.3L Stall VIN: 1G1BL52W8R
Thank you to everyone who replied. Some of the replies were pertaining to a 4.3L V6, which this is not. This is a 4.3L V8. I cleaned all ground, no help. Ohmed all injectors, all within .2 ohms. Blocked off EGR supply vacuum, no help. After all this I was star...
1997 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W8V
Thanx for all the replies on this one the FUEL PUMP RELAY TOOK A DUMP.. Inside the glove box there is 3 relays left side is fuel pump relay..I swaped it with the right side relay still no change..come tofind out that both relays were dead..I had a spare relay ...
2003 GMC Envoy SLE 4.2L Electronic VIN: 1GKDS13S13
well we replaced the blower motor resistor pack with on from the dealer instead of the after market one and all seems to be fine and customer will advise us of any changes...Thanks to all
2007 Pontiac Vibe 1.8L 1-2 shift VIN: 5Y2SL65837
Thank you to all you guys who took the time to help us with this pain in the a@# vehicle. The first part of this problem (code 2111) ended up being a bad TAC unit. After some very careful studying of it's action it turned out that the comparison between the tp...
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