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Prev Professional Automotive Repair Technical Discussions for August 24, 2010
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Open Help Requests for GM
Help Request Answers
1989 Buick Reatta 3.8L door locks VIN: 1G4EC11C9K
This vehicle has been in numerous times for different problems. This time came in with theft alarm going off. Had to disconnect battery to turn off. Remote did not work. Found defective drivers door lock switch. Replaced that and new battery in remote fob. I n...
2004 Cadillac XLR 4.6L Key Fobs VIN: 1G6YV34A54
Used car lot car. Came in with NO FOBS DETECTED MESSAGE but started and ran. Could not program fobs with all 4 methods. Suspected bad RCDLR module. Car lot took to dealer for second opinion, they said needs RCDLR. Installed RCDLR and cannot operate start/off b...
1994 Chevrolet P30 7.4L Excessive Emissions, No Start, Poor Idle Quality, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GBJP37N9R
Hello, I am searching for a PROM for a 1994 Chevrolet "P" series motorhome VIN [...] According to GM this part FOR THE prom is no longer available but the part number is 1...
1999 Chevrolet Tahoe LS 5.7L steering (stiff spot) VIN: 1GNEK13R6X
Usually when on highway,vehicle gets a "stiff" spot in the steering wheel that is very annoying. Replaced ball joints, pitman/ider arms, inner and outer tie rod ends and on the 3rd remanf'd gear box. Problem does not happen all the time. Dealer said this wasn'...
1999 Chevrolet Express 3500 6.5L Excessive Emissions VIN: 1GCHG39FOX
Hello again,I have a probllem with this diesel van. First off this is about the only diesel I work on. I'm not much of a diesel mechanic. This customer, and my boss,insist on me working on it. Well to start with last month I did a head job on this truck, repla...
2001 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 1G1JC52401
car came in for hard starting with codes for crank and cam sensors both sensors were replaced also during further testing ignition module was found to be faulty and was replaced. after repairs same thing came back. when cranking it feels like timing is off. it... Trouble codes: P0336, P340
2006 Chevrolet Colorado WT 2.8L MIL Lamp on VIN: 1GCCS14866
Replaced variable camshaft phaser..crank sensor...phaser solenoid...reflashed ecm...when warm will set pending poo17 code...2 cycles when warm will set light...sets pending when warm so i can not do a relearn...balancer is tight...chain and guides... Trouble codes: P0017
2006 Chevrolet Express 3500 6.0L Misfire VIN: 1GBJG31U66
Intermittent misfires mostly on 1 and 8 cylinders. will run like a top and then some cylinders will misfire about 20 times then be good again. Has coil over plug. I'm kinda stumped because it won't misfire long enough, but when it does it's a dead miss. Trouble codes: P0300
2007 Chevrolet Silverado 1500 LS 4.8L MIL Lamp on, harsh shift VIN: 1GCEK14X47
This truck came in for the trans shifting very harsh. Test drove and verified. Check engine light on and abs light on. Also noticed speedometer jumps all over when moving. Scanned for codes and have no communication with pcm, trans module, abs. Got p0700 from ...
2004 GMC Envoy XUV SLT 4.2L battery VIN: 1GKES12S64
Hello Everyone, I have a 2004 GMC Envoy XUV SLT.The truck has a pulsing draw of 1.72 amps at the rear fuse panel under the rear seat.I am using a low amps current probe with a master tech at the power supply feed to rear panel. There is no pattern to the draw ...
2008 GMC Envoy SLT 4.2L Ignition VIN: 1GKDS13SX8
The key won't turn in the ignition of this envoy. Works OK in the doors. Alldata has no info on removal when it doesn't turn to on position. Any clues on how to get this thing apart would be greatly appreciated. Thanks
2002 Pontiac Bonneville SE 3.8L Cuts out, Misfire VIN: 1G2HX54K62
I need some help with this Bonneville. I have usually been able to find repairs in the repair database but am stumped on this one. This car came in to my shop with the complaint of cutting out under load. Test drove and found two things. One, when first starte... Trouble codes: P0131 (p1131-), P1131 (testing and results)
2004 Pontiac Grand Prix GT1 3.8L No Start VIN: 22G2WP5524
I love being a mechanic so just shoot me!! I've got this GP that has me looking for dynamite. Towed in ,no crank. Pushed it in found no ck. eng. light. Key to start, no signal to starter. Pluged in scan tool[Solus] no comm. Went through the test for no ck. eng...
1996 Saturn SL2 1.9L No Start, Stall, Misfire VIN: 1G8ZJ5270T
Car was towed in with starts/dies symptom. Cold start and the scope patterns for the #4 Compression Siganl is normal along with the CKP sensor and the Coil signals. When the symptoms start occuring the scope pattern of the #4 Compression Signal stays high most... Trouble codes: P1599 (Stalled), P0300 (Misfire)

Fixes & Summaries for GM
Fix/Summary Answers
2003 Buick Rendezvous CXL 3.4L Abs VIN: 3G5DB03E53
Thanks for all the expert help. We were able to isolate the problem to the right rear wheel sensor. Oddly enough this sensor had also been replaced about January of this year. We installed the new wheel bearing and the problem has gone away. Thanks again for a...
1997 Chevrolet Tahoe 5.7L Stall VIN: 1GNEC13R1V
just wanna say thank you to everyone that posted. it was very helpful. the wiring harness that runs behind the alternator down to the crank sensor was laying on the exhaust and burned through the heat tape and the coating on the wire and was shorting out the c...
1998 Chevrolet P30 6.5L procedure VIN: 1GBH932Y8W
it is in fact an rpm sensor. thanks for the replies.
1999 Chevrolet K1500 Suburban 5.7L Ac system VIN: 1GWUYGYT87
None of these fixed the problem. Even hotline tech support cannot identify what the problem may be currently.
2004 Chevrolet Silverado 1500 LS 5.3L Power Steering VIN: 2GCEK19T54
Thank you everyone, Yes I was right I had to replace the steering gear box.
2007 Chevrolet Tahoe LT 5.3L cylinder deactivation VIN: 1GNFK13077
This truck came back in 2 days later with a missfire on #1 cylinder. We also had noise from the same side valve train so we removed the valve cover to inspect the noise. The deactivation lifter for #1 cylinder was collapsed so we removed the cylinder head and ...
1997 Pontiac Trans Sport 3.4L Overheat VIN: GM12345678
Client did not return for further testing. I am closing this out for now. If it does come back I will post the test results. Still need to verify bad heads and run combustion gas test.
2000 Saturn SL2 1.9L passlock VIN: 1G8ZK5273Y
I misunderstood the relearn procedure, when I did it the proper way...3 times. Vehicle started and ran fine. Thanks for everyone's response and help. It was greatly appreciated!
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