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Prev Professional Automotive Repair Technical Discussions for February 2, 2010
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1993 Buick LeSabre Custom 3.8L headlights VIN: 1G4HP53L1P
this car will not let you turn the headlights off if they have been on for more than a few minutes. if they don't go off when they are turned off it may be 15 or 20 minutes before they go off. we have replaced the headlight switch (in the door panel not the da...
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2004 Buick Century Custom 3.1L pass lock VIN: 2G4WS52J44
little old lady picked up car from body shop on firday. called monday, car wold not start. towed to body shop. security light flashing. car towed to my shop. no pcm codes, bcm codes, current code b2960, history codes b1334, b1339,b1422,b1482,b2617,b2957,b2958,...
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2007 Buick LaCrosse CX 3.8L Headlights VIN: 2G4WD58227
Customer states that while driving the low beam lights will go out forcing her to drive with high beams. This has happened tow times. Needless to say I have had no luck duplicating this problem. Have checked wires to the multifunction switch, light switch and ...
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2005 Cadillac STS 3.6L Starting VIN: 1G6DW67735
I Have a Cadillac STS in which will not start. The Engine cranks, but does not start. Before this issue occured. The vehicle used to start hard. You would usally have the try atleast two times. (engine would crank but no start)The tank is half full. We tried s...
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2000 Chevrolet Blazer LS 4.3L MIL Lamp on VIN: 1GNCS18W1Y
Good morning fellow technicians. I have one that is giving me a problem. When I run the evap service bay test, I get diagnostic code p0446 ( evap vent control problem) I have performed all test per the diagnostic chart and here is the descpiption of the proble... Trouble codes: P0446
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2002 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: 1GNDT13S52
Hello folks! This vehicle intermittantly throws a P0014 exhaust camshaft over advanced code. I have replaced the Cam position actuator solenoid valve but the code came back. I have noticed that while watching desired camshaft angle and actual with the Tech2 wh... Trouble codes: P0014
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2002 Chevrolet Express 2500 5.7L Poor Idle Quality, Hesitation, Cuts out, Poor Fuel Economy, MIL Lamp on, P0308 VIN: 1GCGG25R72
with a recurring issue like this, I am at a loss for an answer. I thought I had the bases covered when I installed the engine. Being in a van, I didn't want to be back at this stuff until time for service again. But with the issue of burn through, I can't gras... Trouble codes: P0308 (Mis fire cyl 8), P0404 (Egr performance)
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2003 Chevrolet Blazer LS 4.3L rear differntial VIN: 1GNDT13X03
on deaccelleration vehicle sounds like driving over rumble strip without vibration ,no noise on accelleration,sound eminates or echoes from driveshaft on lift.vehicle has rebuilt transfer case and swapped out known good driveshaft and did not change noise ,fou...
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2005 Chevrolet Trailblazer LT 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNET16S95
Hey all, gotta trailblazer givin' me fits. Came in with misfire code P0302. Replaced the ignition coil (#2) and all the spark plugs. The vehicle still has the misfire ONLY at idle, runs fantastic on the highway. Misfire counter does go up at idle and will stop... Trouble codes: P0302 (misfire cylinder 2)
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1989 GMC C1500 Sierra 5.0L Hesitation, Cuts out VIN: 1GTDC14H0K
this truck will intermitantly have a bad hesitation when cold. Feels like starving for fuel. Came in for rough running and lack of power. Had moisture under dist. cap and worn plugs, original wires. Coil tower corroded bad. Gave truck full tuneup and miss/ rou...
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2005 GMC Yukon SLT 5.3L Drive-axles VIN: 1GKEK13T75
Vehicle came in for noise & binding in front differential in 4WD on slow turns. Sounds like bearing noise. Also it was making a bearing noise at 35-45 mph in 4WD. Replaced all bearings & seals in front differential. Noise at cruise speed is gone but still bind...
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2005 Pontiac G6 3.5L remote start VIN: 1G2ZG52805
hi i have a 05 g6 with factory installed remote start that does not work, lights will flash when hitting remote so it is getting the command to start. any help would be nice, this is the first remote problem that i have had. it did have b1325 code in past hist...
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2006 Pontiac G6 2.4L MIL Lamp on VIN: 1G2ZF55B26
unable to find spec. for heater circut .my otc scanner shows .620amp draw on rear o2.i have ck wire from fuse to sensor and computor to sensor with headlight.maybe needs reprogram Trouble codes: P0054
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2000 Saturn SW2 1.9L Excessive Emissions, MIL Lamp on VIN: 1G8ZN827XY
Service Engine Soon light is on. Code P0172: System Rich Bank 1. Emissions passed on smog test with CO readings of .01% at 15mph, and .00% at 25mph. B1S1 and B1S2 O2 sensors are pegged full rich. STFT is at -50% and LTFT is at -30%. Fuel pressure is 41psi. ECT...
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Fixes & Summaries for GM
Fix/Summary Answers
2002 Chevrolet C7500 8.1L No Start, Hesitation, Stall
we found wiring to tps that was in bad shape. after wiring repair throttle response returned. was surprised tps and actuator codes did reset during testing . maybe pcm wanted to see vehicle speed before codes set. thanks for all the help.
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2004 Chevrolet Tahoe LT 5.3L temperature VIN: 1GNEK13Z84
WELL THE FLEET ACOUNT THAT OWNS THE TRUCK WANTED TO GIVE IT UP TO CLEAR THEIR BALANCE WITH US. OWNER OF THE SHOP IS NOW THE OWNER OF THE TRUCK. HE WANTS TO PUT A USED ENGINE IT (HOPE IT DOES NOT HAVE BAD HEADS) ANYWAY I HAVE THIS THING OUT OF THE TRUCK. ONE OF...
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2006 Chevrolet Impala LT 3.5L Surge, MIL Lamp on VIN: 2G1WB58N46
The car is fixed. it turned out to be water intrustion in the harness under the brake booster at C111. We had a problem finding it until it rained again then the problem was back. the customer didnt tell us that it would only happen when it was raining or afte... Trouble codes: P1516 (Throttle Actuator Control TAC Module Throttle Actuator Position Performance), P2101 (Throttle Actuator Position Performance).
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2002 GMC Envoy SLT 4.2L t-case VIN: 1GKDT13S62
After checking the end play for a broken snap ring which was fine I recommended replacing the control module-the owner declined at this time because the problem was so intermittant-Thank's to all who replied-Deke
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2004 GMC Yukon Denali 6.0L MIL Lamp on, SIR Inoperative VIN: 1GKEK63U64
We endrd up isomg the tech 2 to setup passcodes. Everything worked out. Trouble codes: B1001 (vats passcode mismatch).
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1998 Oldsmobile Bravada 4.3L transfercase VIN: 1GHDT13W4W
Thanks to all who took time to reply. The seal around the sector shaft is part of the bearing and case needs to come apart to replace the seal. customer declined repair at this time. Best fix was a reman transfer case or rebuild, due to mileage on this one. th...
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1996 Pontiac Grand Am SE 2.4L Stall VIN: 1G2NE12T2T
Thank you fellow techs, The customer had to save the money for the PCM replacement and I finaly got it in last week and installed it, reprogramed it and ran it for many miles and hours without the problem reacuring. Many of the replies pointed to ignition sw... Trouble codes: B1021.
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