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Prev Professional Automotive Repair Technical Discussions for September 16, 2013
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Open Help Requests for GM
Help Request Answers
2007 Buick LaCrosse CX 3.8L Compressor VIN: 2G4WC58247
Customer states that ac intermittenly stops blowing cold. Customer says that compressor stop working as in the clutch wont engage. We cant duplicate the problem. There are no codes anywhere in the system. Just wondering if anyone has had any of the same condii...
1991 Cadillac Seville 4.9L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1G6KS53B3M
Vehicle came in running poorly. code 46 present. Not much in ALLDATA on code. test fuel pressure-good. Monitor o2 on both banks, found right bank running rich. Found inj pulse width on Rt bank cutting back to compensate.. Spark strong. EGR valve on affected ba... Trouble codes: 46 (Right to left bank fuel imbalance)
1999 Chevrolet Corvette 5.7L MIL Lamp on, Temp gauge erratic VIN: 1G1YY22G4X
Hello All... this vette came to me with a complaint of erratic Temp gauge and hesitation. Its setting codes P0117 and P1114. I tested the ECT circuits 718 and 410 from sensor to PCM by loading the circuits with a headlight... good and bright no problems with c... Trouble codes: P0117 (ECT sensor circuit low voltage), P1114 (ECT sensor circuit intermittent low voltage)
2002 Chevrolet Cavalier LS 2.2L Brake line VIN: 1G1JF52412
In the steel brake lines to the rear drums there is a connector in each line What are they called. Could they be an inline proportion valve. One of these leak brake fluid. I think I have seen these a few times in the past but have never had to do anything with...
2003 Chevrolet S10 4.3L clutch pedal VIN: 1GCCT19X43
Customer ruined transmission, replaced transmission, slave cylinder and master. clutch pedal is firm but has to be pushed to floor to get into reverse. We installed shim behind flywheel and problem is still there. there seems to be no air in the system. It wil...
2005 Chevrolet Silverado 1500 4.3L Engine VIN: 1GCEC19X55
Drive vehicle after warm between 30-50 mph it has a low whistle/moan noise.sounds like it is from engine area. Checked intake and other related parts for leaks.. None found... Any help would be greatly appreciated... Thanks..
2007 Chevrolet Silverado 3500 HD WT 6.6L Engine bad VIN: 1GCJK33667
Hello everyone. I received a 2007 Classic body style 3500HD LMM Duramax with a bad engine (sounds like a broken crank). Now here is my question, as I have not changed a duramax yet; The owner has located a low mileage complete engine from a wrecked 2009 C-5500...
2009 Chevrolet Silverado 1500 LT 5.3L Surge VIN: 3GCEC23069
Truck has a hard surge(jerk) on light acceleration worse on slight grade low speed. No misfire counts on TECH2, fuel trim -6 or better when acting up.Does not seem to matter what gear trucks in. ANY THOUGHTS, THANKS
2002 GMC Savana 2500 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GTGG29R62
Vehicle was brought in with complaint of bucking/making noise. Drove, noted solid CEL in park, once in gear flashing CEL and notable misfire. IAT reading was initially boucing between -38f and 262f with short periods of somewhat normal functioning. Wiggle test... Trouble codes: P0112 (IAT Ckt low), P0113 (IAT Ckt high), P0300, P0327 (Knock sensor 1 signal short/low), P1111 (IAT Ckt intermittent high), P1112 (IAT low volts intake plenum switch)
1997 Saturn SC2 1.9L No Start, Stall VIN: 1G8ZG1270V
after running for 5 to 10 minutes this car will die losing the ground to the fuel pump relay. After sitting for 5 to 10 minutes the car will start again. .have takenseveralmovies with thebtech lll but see nothing. The gn/w wire will hickup 5 to 10 seconds. Bef...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick LeSabre Custom 3.8L Stall VIN: 1G4HP52KXV
Thanks for all the replies. It gave me a lot to think about. Many of you said the crank sensor was a strong candidate for failure but i could not make it cut out by tapping on the sensor. Not that this made it good but i thought i would investigate some other ...
1995 Chevrolet S10 LS 4.3L ABS Light VIN: 1GCDT19Z0S
Thanks for all the help especially to EDs auto for so much input, I had 2 issues main brake light was due to air in the rear system , customer never complained about poor brakes, but when I got the brake light to go out by disconnecting the pressure different...
2005 Chevrolet Silverado 1500 5.3L Hesitation VIN: 2GCEK19B85
We replaced both knock sensors and the valley pan seals. The rear one was under water and the front one was full of oil. This did not help the hesitation. The fix was to replace the throttle body. Scoped tested it and couldnt see any dropouts or gliches but it... Trouble codes: P0332.
2007 Chevrolet Trailblazer SS 6.0L Stability VIN: 1GNET13H47
The customer has decided to think about this for awhile. I got a lot of good help for this however the customer didn't want to proceed. The customer did add late in the process that he had the left front wheel bearing assembly replaced with a non oe part, go f...
2011 Chevrolet Camaro LT 3.6L No Start VIN: 2G1FC1ED0B
I got so many great responses I can't thank you guys enough. Special thanks to Michael from Alabama for sending me the article on Global A Electrical Architecture. The guy I buy all my dealer software from asked me to forward it to him. The car lot owner pur...
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