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Prev Professional Automotive Repair Technical Discussions for May 24, 2012
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Open Help Requests for GM
Help Request Answers
1999 Cadillac DeVille 4.6L Excessive Emissions, VIN: 1G6KD54Y0X
Came in with P0440 and failed emissions, HC. Found stuck closed purge valve and cracked gas cap seal. New gas cap and purge valve, ran Service Bay Test, passed. Found worn plugs and wires. Customer has Autolite Platinum AP104 plugs installed, unknown wires. Fo...
2008 Cadillac CTS 3.6L radio VIN: 1G6DM57798
The car came into my shop with the radio, navigation and lights in the center dash are not working. when it first came in we pulled all the fuses and reinstalled them and everthing started working. customer returned today with the same problem and we checked a...
1994 Chevrolet S10 LS 4.3L Hesitation, Cuts out, Misfire VIN: 1GCDT19W0R
Vehicle has poor driveability when cold. At cold idle, there is a slight misfire. When accelerating from a stop, there is almost no reponse from the accelerator pedal until the vehicle speed increases. Engine cuts out and stumbles continuously until cruising s...
1994 Chevrolet Caprice Classic 5.7L Unknown VIN: 1G1BL82P0R
I have a good one here guys. Vehicle is loosing voltage anytime there is a draw from power windows to brake lights you name it. Till the point it will eventually stall out. The charging system is putting out 14.2v. I found the 12v wire from the battery to the ...
2000 Chevrolet Silverado 1500 5.3L No Start, Stall VIN: 1GCEK14T2Y
Customer states that vehicle starts just fine in the morning, but after engine is warmed up and then engine is turned off and let sit for a while the engine will crank for a long time and not start until he tries again and it eventually starts, runs rough for ...
2006 Chevrolet Impala LT 3.9L No Start, Cuts out, Stall VIN: 2G1WC58166
After replacing starter, drove fine. Suddenly, lost power assist on brakes, hit accelerator died. Wouldn't restart. Towed back. No start. while playing with it it suddenly started. I got it to act up in park once in the bay. I have spark, fuel pressure. No eas...
2008 Chevrolet Aveo LS 1.6L Cuts out, Lacks Accleleration VIN: KL1TD566X8
Thanks in advance for any help you can throw my way. Customer stated car sputters and runs poor at times and has no acceleration when stepping on gas pedal . She shuts vehicle off & restarts then it works okay . Transmission light comes on on dash. We performe... Trouble codes: P0705
1997 GMC C1500 Sierra SL 5.7L A/C Compressor VIN: 1GTEC19R8V
Hi guys, This owner of this truck is a good friend which purchased it without an operating a/c. He brought it to us to repair. The compressor was unplugged, presumably due to it being locked up. The blower switch wouldn't work on high speed. We replaced the ...
2005 GMC Envoy XL SLE 4.2L Poor Idle Quality VIN: 1GKET16S65
This vehicle came in about a week ago (Customer just purchased from a private party about a month ago it did not have this code then) with a P0017 cam and crank correlation error. We replaced the actuator and it came back with the same code. Went threw Mitchel... Trouble codes: P0017 (Cam and Crank correlation error)

Fixes & Summaries for GM
Fix/Summary Answers
1998 Chevrolet Corvette 5.7L Cuts out, Stall, Steering lock VIN: 1G1YY22G9W
Well we ended up putting in the bypass kit from Corvette of Houston & it fixed it. We believe the replacement relay kit we put in went bad, caused by a defective motor. Just wish we would have done the bypass 1st!. Thanks guys for all the responses. We Learned...
1998 Chevrolet Tahoe 5.7L No Start, Start & Stall VIN: 3GNEK18R9W
Thank you to all whom took the time to help me out on this. This truck is repaired. The problem was in the harness to the passlock sensor (the part on the colum). What I found was that the diod on the ground circuit had gone bad. Funny part was that there w...
2000 Chevrolet Suburban 1500 LT 5.3L Excessive Emissions, Misfire VIN: 3GNFK16T6Y
Thanks fellow’s for all the help, for the people who ask about the fuel pressure regulator yes we did check that, I just forgot to list it. Thanks for everyone who mention the valve train, I heard a noise coming from the valve train earlier in our diagnoses ... Trouble codes: P0300, P0153, P0154.
2004 Chevrolet Trailblazer LS 4.2L Stall VIN: 1GNDT13SX4
Cleaned the throttle body and we are good to go so far. Thanks for all the help. The owner did not want to address the secondary air pump issue at this time but cleaning the throttle body seems to have stopped it from stalling.
2008 Chevrolet Suburban 1500 LTZ 5.3L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 3GNFK16318
David from Penn hit the nail on the head. NEEDS new cam and crank its at the GM dealer getting fixed for FREE!!! Thank you iATN and the techs that replied. Trouble codes: P0300, P0308, C0561.
2007 GMC Sierra 2500 HD SLT 6.0L MIL Lamp on VIN: 1GTHK29K57
well. this vehicle continues to be a nightmare. The customer took the truck (as it is a work truck). The problem pretty much cleared it self up. I can only account this to the change in weather conditions. It is now staing warm here and possibly causing t... Trouble codes: P0575, P0700, P2544, U0101, U0102, U0100.
2009 Hummer H3 3.7L under body VIN: 5GTEN13E99
Customer has not returned for service. Thanks to all the techs who replied.
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