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Prev Professional Automotive Repair Technical Discussions for October 18, 2012
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2002 Buick Century Custom 3.1L Stall VIN: 2G4WS52J32
This car came in with a bad miss.Scanned it at the time I had 2 codes PO300 And P1189... Checked the misfire count and #1 Cyl was highest.Changed the plugs, wires and fuel filter and ran much better.Let the car set for awhile and came back and started it and i... Trouble codes: P0300, P1189 (Oil Switch Signal Circuit), P1626 (Theft Deterrent)
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2006 Cadillac DTS 4.6L Unkown VIN: 1G6KD57966
I have a shudder/vibration type sensation under heavy acceleration.
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1995 Chevrolet G30 Hi-Cube 5.7L Excessive Emissions, Poor Idle Quality, Surge VIN: 1GBJH32K6S
NEVER THOUGHT ONE OF THESE OLD TBI WOULD GIVE ME THIS MUCH TROUBLE. OTHER THAN IDLE VAN RUNS FINE DRIVE GOOD DOWN ROAD & HAS GOOD POWER.Engine will start & idle great until closed loop. Will idle good for bit then gradually idle low. IAC will start to retract....
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2002 Chevrolet Express 3500 8.1L MIL Lamp on VIN: 1GBJG31G32
We have been having issues with our van setting a P0101 DTC for several months. It used to come and go, but now it sets a P0101B almost every drive, generally between 40-50mph, approx 50% engine load. No drivability symptoms. We previously replace the CKP sens... Trouble codes: P101
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2002 Chevrolet C7500 Kodiak C7H042 7.2L alt, tach VIN: 1GBM7H1C32
Truck came in not charging. Replaced alt and it was good for 10 days. Cust said the ABS light would come on and the charging gauge would peg at 19v. When the ABS light went out the gauge would go back down. The batt light never came on. Truck died and was towe...
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2003 Chevrolet Silverado 2500 6.0L MIL Lamp on VIN: 1GCHK29U43
Vehicle came in with airbag light on. DTC B0103 active code. Scanned DTC and found electronic front end sensor 2 performance. Scanned SDM and found it was receiving ID from both front sensors. Back probed connector and have power at sensor. Disarmed SIR by pul... Trouble codes: B0103 (Electronic front end sensor 2 performance)
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2004 Chevrolet Venture LT 3.4L Poor Idle Quality, Stall VIN: 1GNDX13E94
This van will not start when cold unless you open the throttle a little. Will then idle. Customer says it will sometimes stall when coming to a stop. Always starts when hot, but idles to fast and sets fast idle code. I replaced the IAC valve and it started ri...
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2005 Chevrolet Equinox LT 3.4L Radio VIN: 2CNDL73F75
Hi all in IATN land. Thanks for taking some time to read this post. Truck came in with nasty sounding right speakers at low volume. Right rear window had been broke out at one time so I went to the amp under the rear seat. Sure enough it had two green connecto...
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2005 Chevrolet Cobalt LS 2.2L MIL Lamp on
I have this cobalt with a 2.2 that has a code 1516. My problem is after following the diagnostic flow chart from shopkey when Iwas supposed to check across the motor contol wires with a test light mine lit and wires were not shorted to power so replaced thrott... Trouble codes: P1516
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2008 Chevrolet Silverado 2500 HD WT 6.6L Cuts out, MIL Lamp on VIN: 1GCHK23608
Hello to all Techs. This is my first tech ask and I'm needing guidence as the Tech that started this vehicle for me has left and taken all data with him. Feeling like a goose I'd like some ideas please. This vehicle runs fine until put under heavy load (towing... Trouble codes: P0299 (Turbo underboost)
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2008 Chevrolet Silverado 1500 LTZ 6.0L No Crank VIN: 3GCEK13Y48
THE CAR HAS NO CODES.IT IS COMUNICATING WITH ALL THE MODULES.IT IS GETTING A CRANK REQUEST TO THE PCM.THE PCM DOES NOT SEND SIGNAL TO THE STARTER RELAY. If we GIVE 12 VOLTS TO THE SIGNAL WIRE FROM THE PCM TO STARTER RELAY,IT WILL SPIN OVER,BUT NOT START(with i...
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1993 Geo Storm 1.6L Stall VIN: JB1RF2360P
Thanks for the help in advance. Got this sweet 93 geo storm that came in for a no start. Customer has been doing his own work on it, had low fuel pressure, pump wasnt installed properly. Fixed that problem and vehicle started and ran for about 5 min. then stal...
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1997 GMC Yukon SLE 5.7L Guage fluctuations VIN: 1GKEK13R1V
After replacing fuel pump and following wiring harness directions for new connector, the fuel guage fluctuates with the sloshing of the gas inside the tank. We have tried a carter fuel pump and a gm pump, both have different connectors that need to be rewired ...
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Fixes & Summaries for GM
Fix/Summary Answers
2006 Buick Rendezvous CXL 3.5L steering VIN: 3G5DB03L06
Okay, got this one. Wanted to wait to reply as the process was interesting and wanted to be sure it worked. The fault was the differential. The extended warranty company sent out a reman differential unit. Here is what had to be done. First, install unit and a...
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2000 Chevrolet Suburban 1500 LT 5.3L rattle noise on rail VIN: 3GNFK16T5Y
I believe the 'Burb is fixed, we haven't seen or heard from him in over a week. I used a "Carquest" fuel pressure regulator. Yesterday , a fellow from General Motors R&D called me after seeing my post on IATN wondering if I found and solved the problem. He c...
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2005 Chevrolet Equinox LT 3.4L sets code c0035 VIN: 2CNDL63F85
REMOVED LONG HARNASS FROM VEHICLE OHMED IT WHILE WIGGLING IT UP AND DOWN THE HARNASS AND IT NEVER WENT OPEN,BUT REPLACED IT ANYWAY AND HASNT BEEN BACK YET . THANKS TO ALL WHO RESPONDED
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