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Prev Professional Automotive Repair Technical Discussions for September 27, 2006
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Open Help Requests for GM
Help Request Answers
1997 Buick Regal LS 3.8L 1 gear VIN: ZG4WB52K4W
Only when cold does the trans slips on acceleration. Fluid level is ok. When fully warmed up trans shifts fine. Cleared code P0741 (retrieved with Snap on scanner) performed road test code comes back within 10 mins of driving. Alldata recommends replacing the ...
1989 Cadillac Fleetwood 4.5L engine
the car still runs hot after operating for a short period. the radiator and thermostat have been replaced. i have checked for restrictions. the cooling fans operate properly but the air is cool. apparently i have a circulation problem. i have removed the water...
1979 Chevrolet K30 Cheyenne 5.7L Suspension/Steering VIN: CKL349B108
We are the fourth facility to look at this vehicle. Driving this vehicle btwn 15-35 mph- if you hit a bump, the steering wheel shakes violently. So much, that your hands will be removed from the wheel. You must come to a complete stop & start from there. Above...
1993 Chevrolet Cavalier RS 2.2L Poor Idle Quality, Surge VIN: 1G1JC544XP
This car came in with #4 fuel injector leaking and rough idle. We installed A NAPA replacement injector and still had the rough idle and found it ran very choppy at cruise rpms. We proceeded to scope/scan engine. Patterns looked funky so we changed out spark p...
1997 Chevrolet Blazer 4.3L wiring VIN: 1GNDT13W4V
Good morning, I have a 1997 Blazer that came in with the complaint of "popcorn popping behind glove box, smoke, and a horrible smell". This has happened twice with the truck being driven directly to our shop after the second occurence. There was a burnt elect...
1998 Chevrolet K1500 Cheyenne 5.7L Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 1GCEK19R3W
First post so I hope i've got everything right. Truck will intermittantly lope/surge at idle and sometimes at cruise. Seems to be worse when cold. MAP sensor voltage pid reads .2 at times then will jump up to .6, these conditions may happen at the same time or... Trouble codes: P0107
1998 Chevrolet K2500 Cheyenne 5.7L No Start, Poor Idle Quality VIN: 1GCGK29R1W
Hi every one thanks to all your help this P/u was towed in with a rough idleand misfire.Since I've had it it will not run It will .start run rough and die. Previous to this it had a misfire on cyl5,6,7,8 and no codes fuel pressure 60lbs cranking good spark cha...
2000 Chevrolet Silverado 1500 4.8L Internal Lubrication VIN: 2GCEC19V3Y
Ok boys and girls, a real head scratcher here: Customer complained of engine noise and smoke from the tail pipe on initial cold start up. Both the smoke and noise goes away after 30 seconds to 2 minutes. Two other shops have told the customer the head gasket ...
2000 Chevrolet Metro LSi 1.3L Airbag Light VIN: 2C1MR5229Y
Air bag light on. Codes stored:B1016,B1018.B1021,B1022 & B1035. Used 2 ohm jumpers on both front bags and first 4 codes continue. Ohmed all wires from bag connectors to module test good. Data shows resistor values so it is reading the jumpers. Front sensor tes...
2000 Chevrolet S10 2.2L MIL Lamp on VIN: 1GCCS1456Y
We have a s10 pickup setting a p0340 code(cam sensor). The truck came in with a blown head gasket and cracked cylinder head. We sold and installed a Jasper engine, 2.2 liter. The code set after the engine installation. As best we can tell, the code was not on ... Trouble codes: P0340
2001 Chevrolet Silverado 1500 5.3L Misfire, MIL Lamp on VIN: 2GCEK19TX1
Vehicle has an intermitting misfire on cylinder #7. Replaced plugs and wires. Still had misfire #7 via scan tool readings. Replaced #7 coil, still had misfire. The only thing adnormal I can see about my scope pattern is a slightly high firing line on #7. The c... Trouble codes: P0300 (Multiple misfire detected)
2001 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC52451
Towed in by customer. They replaced the crank and cam sensors at least once, and I think more than once. Car turns over, no start most of the time. When I starts, it's fine with no problems. I get codes u1000 from all computers and u1016 from BCM. This points ... Trouble codes: U1000, U1016
2003 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHK24113
Hi To all: I have a customer with a duramax that starts hard warm. Starts ok hot and cold, But will crank over 4 or 5 times warm, as well as somtimes warm, will crank over for a minute or so before it starts. Low side of system has checked out ok, holds vacumn...
2005 Chevrolet Silverado 2500 HD 6.6L trailer wiring VIN: 1GCHK24265
Truck has a factory installed trailer wiring--no power at TRAILER right brake light fuse at the driver's interior fuse block. Can anyone send me a complete wiring diagram of the trailer wiring.
1996 Geo Metro LSi 1.3L air bags VIN: 2C1MR5293T
air bag on passenger side is missing. air bag light is on. #1 will drivers side still work if this one is not replaced? #2 can i test crash sensors etc. to make sure a new airbag will not deploy when installed. our modis scanner does not have airbag info for t...
2001 GMC Yukon SLE 5.3L Misfire, lack of power VIN: 1GKEK13T61
Customer dropped vehicle off stated vehicle had no power.I checked for codes no codes present scanned data showed vehicle was missing on all cylinders intermittently but not enough to cause a code.Checked spark plugs and are ok,test drove vehicle and is very s...
1994 Oldsmobile Bravada 4.3L No Start, Stall VIN: 1GHDT13W8R
this vehicle came in with the complaint of no power and stalling. scanner data stream showed no tps response. examination showed the incorrect tps (turned the opposite direction necessary). we replaced the tps and all was well. the vehicle came back with compl...
2000 Oldsmobile Intrigue GX 3.5L cooling system VIN: 1G3WH52H3Y
car came in for a noise when cruising @ 50-55. found the noise was suging hoses like a boiling cooling system. when this happenes gauge goes up to about 5/8's. also when this occurs lower hose is cool, which is engine output, and upper is hot. acted like head ...
1996 Pontiac Grand Am SE 2.4L catalyst monitor VIN: 1G2NE12T3T
hello everyone , hope you can direct us to a repair or info on how to determine a solution to a catalyst monitor that wont run . vehicle came in with 4 codes , rear o2 slow, cat low efficiency, knock sensor activity , rich bank 1, weve got it all repaired and ... Trouble codes: P0420, P0172, P0325, P0139
1999 Pontiac Bonneville SSE 3.8L heat VIN: 1G2HZ52K6X
car came in not running.found wet plugs changed upper intake.car runs has no heat.not up to opper. temp.found no thermostat so put 1 in. still no heat.have good temp. at heater hoses.
1999 Pontiac Grand Prix GT 3.8L ABS / TRAC Control VIN: 1G2WP52K6X
Car came in with intermitten ABS light coming on. C0041 code stored in memory. Replaced RF wheel bearing and speed sensor. Light will still come on and abs will activate but only when making a right hand turn that requires some braking. It will never act up wi...

Fixes & Summaries for GM
Fix/Summary Answers
2001 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y51
I want to thank everyone who took the time to reply on this caddie, The fix was to sent this to the dealer for a recode on the air bag and also on the crank relearn. The reason the system went down the first time was because the battery was unhooked and this i... Trouble codes: B1001 (Option configuration error), P1336 (CKP system variation not learned).
2001 Cadillac DeVille DTS 4.6L drivers seat VIN: 1G6KF57991
Thanks for the replies. 1 about wiring getting pinched is my guess. customer said that dealer was going to look at problem, because they put in the seat heaters. if not fixed at dealer (2 weeks ago) we will see it back. Thank you Ken
1989 Chevrolet C1500 Cheyenne 5.7L Hesitation, Surge, Stall VIN: 2GTDC14K9K
Before i go any futher i want to thank each and every one of the techs that replied to my s o s. First we checked and cleaned all grounds. Then after checking voltage at the fuel pump and looking for dents in the gas tank, we pulled the gas tank and checked fo...
1991 Chevrolet K1500 Cheyenne 5.7L heater VIN: 2GCEK19K9M
The problem existed after a co-worker replaced the intake manifold on his truck and installed a new aftermarket heater hose connector on the new intake. The original problem was a gurgling noise from the heater core, despite several attempts at bleeding the co...
1994 Chevrolet C3500 Cheyenne 6.5L all gauges VIN: 1GCHC33F8R
Hey guys thanks for all the help, I found a couple of shorted wires in the main harness somone who had worked on the truck before had the harness resting on the exhaust mainifold and of course it burned though and shorted out, the wire that caused the problem ...
1994 Chevrolet Lumina APV 3.1L No Start VIN: 1GNDU06DXR
Fix for the vehicle was (correctly suggested by two techs) the ignition module. The connections to the ignition module to be more exact. The connectors were deteriorating, had to crimp them tighter and since then, all is well. Other suggestions that didn't app...
1998 Chevrolet Tahoe LS 5.7L Ignition VIN: 1GNEK13R5W
Thanks for the replies. This was a classic case of overlooking the basics. The problem was in fact poor connection at batt. Positive terminals-although it look great, it wasn't making contact-sometimes. What threw me was that bumping gear selector or steering ...
2000 Chevrolet Impala 3.4L Misfire VIN: 2G1WF55E3Y
The 3 replies that I received mostly told me to check things that I had already done and posted in the initial complaint. I decided to see if it was ignition or fuel that was causing the cylinders to miss. I put the Modis on and watched the scope. The secondar...
2000 Chevrolet Blazer LS 4.3L transmission VIN: 1GNDT13W5Y
The customer and his wife decided that they had enough problems with this truck and are trading it off. He made it sound like it was a money pit since it was new. Other things we tried to cure it was reindexing the converter, checking crankshaft end play, and ...
2000 Chevrolet Malibu LS 3.1L Misfire VIN: 1G1NE52J7Y
after recieving many good ideas, i got the car back in today and checked the misfire data found that the #5 cly was missing. checked the wires was ok removed the plug found that the porcelin was cracked on the plug. replaced the plug and the wires due to milea...
2002 Chevrolet Silverado 1500 5.3L rotors VIN: 2GCEC19V92
I don't want to be misleading since I had allready fixed this vehicle by performing the necessary brake service before I left this posting. I sincerely appreciate everyones input and I do agree that the brakes performed wonderfully on this vehicle for the mile...
2003 Chevrolet Impala LS 3.8L Security light VIN: 2G1WH55K33
Thanks to All who took the Time, Everybody seems to agree the bcm is At fault,It seems this one will be going to the dealer since i was told I will Need A tech two to complete the job. Thanks again for all The help
2000 GMC Jimmy SLE 4.3L Shifter stuck in park intermittently VIN: 1GKCS13W6Y
First off thanks for those that offered help suggestions. It ended up being a two part fix the ignition switch was loosing voltage and the PNP switch and connector were damaged. Unfortunately I ended up way side tracked on this the pink wire is not involve...
2003 GMC Sierra 2500 HD SLE 8.1L battery VIN: 1GTHK23G63
Thanks to all that replied. The customer informed us that the instrument cluster had been replaced at the beginning of the year by another local repair shop and that was when the problem seemed to start up. His previous problem was speedometer operation proble...
2000 Saturn SL1 1.9L power locks,,and misc.inop VIN: IGSNZ27658
first thanks to all of you poeple who took the time to offer yur help,,,i found an intermittant short in the l/f door near the window regulator.
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