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Prev Professional Automotive Repair Technical Discussions for July 16, 2012
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Help Request Answers
1987 Buick LeSabre Limited 3.8L ignition VIN: 1G4HR143XH
the buick came in running very rough with multiple misfires. My coworker started to replace the coil packs and didn't realize the key was on. he grounded out one of the ignition control module wires and blew the ignition/ pcm fuse. he replaced the fuse and icm...
1996 Chevrolet Impala SS 5.7L Oil Pressure VIN: 1G1BL52PXT
We have replaced the seals above the oil filter housing 3 times in the last month and they continually leak again after a week or 2 and i mean a serious leak. Mitchell shows a pressure relief spring in the oil pump and the pressure atleast 6 psi at idle. The v...
1999 Chevrolet Tahoe LS 5.7L No Start, MIL Lamp on VIN: 1GNEC13RXX
Customer brought in vehicle with check engine light on and said it would not start back up if turned off. It will start up right away if you spray a little B-12 in the throttle body and idle fine until you try and accelerate then it bogs down really bad. Check... Trouble codes: P0122 (TP or APP Sensor), P1122 (TP Circuit Intermit low voltage), P0101 (Mass Air Flow)
2003 Chevrolet Silverado 1500 5.3L Compressor VIN: 1GCEK14TX3
Hello all Scratching my head on this one. car came in with a siezed a/c compressor. we replaced a/c compressor and tensioner cause it was locked up. Everthing was fine for 3 days and then the compressor melted and horn stopped working. replaced compressor agai...
2006 Chevrolet Cobalt SS 2.4L No Start VIN: 1G1AM15B16
Cust complained was very hard to start. Started fine, scan engine light had a code for the intake cam solenoid. Was not acting up but replaced the solenoid and did ofl. Car ran fine. Cust brought back next day said still hard to start, can not duplicate any ha... Trouble codes: P0171 (Fuel system lean bank one)
2008 Chevrolet Silverado 2500 HD LTZ 6.0L brakes, steering VIN: 1GCHK23K38
Ok guys, normally this wouldn't be a problem, I normally deal with MOPAR products more that gm. If you are still with the engine idleing and turn the wheel the brake pedal will drop and if you are rolling and turn the wheel it will stop the truck dead in its t...
1993 GMC P3500 6.2L Turn Signal VIN: J8DC4B1K1P
Vehicle has no turn-signals or hazards when running or key in run position with engine off. Hazards work when key is turn to Acc postion. Wiring diagrams difficult to locate. Plugged in a new switch assembly, did not work. Anyone know off hand what my problem ...
1997 GMC K2500 Sierra SL 6.5L Hesitation, MIL Lamp on VIN: 1GTGK29F7V
The light was on all the time. we replaced the cross over pipe and the waste gate vac control solenoid. the ses lamp was out for 4 days but now its back. There is a very small exaust leak but i dont think its big enuff to matter. The customer has gotten the ex... Trouble codes: P0236
2004 GMC Sierra 2500 HD SLE 6.6L Oil VIN: 1GTHC24174
After replacing the injectors on drivers side for misfire started and ran great. Tech went on test drive with no problem. Looked under the truck and holy cow we have a massive oil leak (underside of truck completely covered).We have no leak while idling but if...
2006 GMC Savana 2500 6.0L Calipers VIN: 1GTGG25U76
I have a reg customer in complaining of Violent side to side vibration on highway when brakes applied.Roadtest vehicle on highway and unable to duplicate.However truck has a brake pull to right and very little brake pulsation when hot.Graphed ABS data and unab...
2006 Pontiac G6 GTP 3.9L Charging system VIN: 1G2ZM35126
GTP convertible came in with complaints of sometimes no-start and sometimes killing while driving. They had replaced the battery and the alternator and the problem continued. Their battey is a 75 DLG with cold crank amps at 700, and Mitchell recommended 75 7YR...
2003 Saturn LW200 2.2L No Start VIN: 1G8JU84F23
I'm losing ign. volts from the pcm to the fuel pump relay. Replaced fuel pump about 4-months ago, because the customer stated that the engine would quit when it was low on fuel.Vehicle came back about 3-weeks ago for crank no-start. Test revealled no ignition ...

Fixes & Summaries for GM
Fix/Summary Answers
2006 Buick Lucerne CX 3.8L Steering VIN: 1G4HP572X6
Thanks To All You Guys that replyed.FIRST the rack boot was just moist so i sucked p/s resevoir dry and refilled with lucas.i got the car back july 3rd.i seperated ball joints and tierods from knuckles turned them to elimenate tight or flat spots in those.and ...
2003 Cadillac CTS 3.2L ignition, shifter VIN: 1G6DM57N13
Thank you guys very much, ECM was the source of my issues. The reason I did not jump stright to it was becuase it had been replaced before. But after talking to my customer, he told me the battery died and was replaced. So I think that weaked the ECM and when ...
1978 Chevrolet Corvette 5.7L wipers
thanks to all that helped with our problem, the wire in question was a ground, checked for voltage found none so tried grounding and wipers worked. installed a eyelit with a 3/8 hole and bolted to the bellhousing.
1992 Chevrolet C2500 Cheyenne 6.5L No Start VIN: 1GCGC24F5N
Sorry I can not give you a final fix on this one but I think I know the the next step to be taken. With over 200K on the injection pump it seems pretty clear that the pump will need to be rebuilt and have the needed updates incorporated into it. Customer does ...
1996 Chevrolet C1500 Cheyenne 5.0L driveshaft VIN: 2GCEC19MXT
had shaft rebalenced aok now thanks every one for the help
1999 Chevrolet K1500 LS 5.7L No Start VIN: 1GNFK16R9X
Thanks for everyones help.I left the truck as stated in my update.I didn't install the OEM flex plate because the owner was happy with the way it sounded.The kick back problem went away after installing A/C Delco cap and rotor.(I will never use after market ag...
2005 GMC Envoy SLE 4.2L Brake pedal VIN: 1GKDT13S45
Thanks to all. Just took alot of extra brake bleeding to get all the air out of the system.
1957 Oldsmobile Golden Rocket 88 6.1L Mechanical VIN: 577M401620
Thanks for all your replies. We increased the squiters and pumps from 30 to 50 which helped. And he will have to learn to downshift and put his foot in it above 1500 RPM. We know it is overcarberated, but the customer wants to keep this setup on the car. The c...
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