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Prev Professional Automotive Repair Technical Discussions for December 3, 2007
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1991 Buick Park Avenue 3.8L Excessive Emissions, Poor Idle Quality, Hesitation, Stall VIN: 1G4CW53L6M
Hey every body, a friend of mine braught this car into me because it runs terrible when warm and dies soon after. I'm not talking about it dies when completly hot it dies a few minutes after starting.the tests i have run are; fuel pressure, spark,injector impu... Trouble codes: #43
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2002 Buick Century Custom 3.1L abs module VIN: 2G4WS52JO2
This car has come to me on five occasions with diagnostic code U1040, loss of comunication with ebcm. I can comunicate with all computers except. A.B.S. module when its doing this but every time I get it in to work on it its working fine and all computers are ...
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1998 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54YWU
Removed engine to install new head gaskets and seal bottom end oil leaks. Sent engine to machine shop to have head gaskets install with new inserts. Installed engine machine shop had timing off car would not start. Timed engine, car runs fine, no misses. Deliv... Trouble codes: P0300 (Multi Cylinder missfire)
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2000 Cadillac Seville STS 4.6L power window VIN: 1G6KY5494Y
good morning cadillac techs.i have very little experience on these cars and here is my problem.the left rear power window does not work from the drivers door switch but it works from the left rear door switch.it will go up from the drivers door switch but it w...
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1999 Chevrolet Tahoe LS 5.7L Misfire, Poor Fuel Economy VIN: 1GNEK13R3X
This Tahoe misses at idle steady at an idle on number 7 cylinder. compression great, spark great and took upper plenium off and poppets and injectors great. Now only diff is at idle oil pressure light came on and pressure at idle is 1.5psi. at 1000 rpm up to 4... Trouble codes: P0300
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2002 Chevrolet Express 2500 5.7L starter VIN: 1GCFG25R52
crank fuse blows when cranking,I replaced starter and ignition switch,switched starter relay,voltage drop tested battery cables,added a ground cable from frame to starter. The fuse doesn't blow if starter s wire is removed from starter or if the ignition switc...
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2002 Chevrolet Suburban 1500 LS 5.3L Automatic Level Control VIN: 3GNFK16Z62
Thank you in advance. We had this Suburban come in with customer complaint of automatic level control inoperative. Customer claimed problem started right after rear brake service at another shop. We checked codes and found code C0660 ( exhaust solenoid valve c...
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1995 GMC Jimmy SL 4.3L Hesitation, Cuts out, Stall, Misfire VIN: 1GKDT13W5S
this vehicle came in barely running. rough idle, cuts out when trying to accelerate. when it warms up it searches at idle. quick visual inspection turn up nothing obvious. hooked up tech 2, no DTCs. checked for restricted intake and exhaust:ok. customer states...
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1997 GMC Cab Forward 3.2L No Upshift VIN: J8DB1K8V70
As stated, this vehicle has the Isuzu engine with the asian trans. It will not upshift. The customer just bought it, knowing that it didn't shift. So far we have exhausted all of our resources as far as accessing the computer. None of our software supports thi...
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2002 GMC Savana 2500 4.3L rear lights VIN: 1GTGG25WX2
hello fellow iatn members. we have a fleet of work vans all with the same problem. when the tail lamps are on all four bulbs in the rear of the truck are lit. when the brake is depressed the two lower light bulbs go out and the upper two stay the same brightne...
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2002 GMC Savana 3500 6.5L Excessive Emissions, No Start, Poor Idle Quality, Stall VIN: 1GTHG39F12
HI THIS ONE TO ALL GM DIESEL TECH. THIS VAN BE TOWED IN BECAUSE OF STALLING & HEAVY SMOKE FROM TAIL PIPE(GRY & BLACK). ALSO ENGINE IDLE SO POOR !!!(ENGINE SPEED BETWEEN 5OOrpm--1500rpm JUMPING AROUND). I FOUND TWO FAULT CODES P1216C & P0219C WITH MY GENISYS SC... Trouble codes: P216, P219
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1995 Oldsmobile Aurora 4.0L heater VIN: 1G3GR62C7S
i confirmed the heater was plugged by cutting open the end of it. installed a new core, roan tested the vehicle,no heat. checked hoses to the core, both are hot. checked both the driver and passenger side mix door motors,ok. i even dropped the motors and manua...
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1999 Oldsmobile Intrigue GL 3.8L Misfire VIN: 1G3WS52K3X
Came in with a service engine lamp on. Vehicle shows a misfire on cylinder 2. Compression and fuel pressure check out okay. We have moved the coils around without any change, still misfires cyl 2. We have moved injectors as well as replaced with new and still ... Trouble codes: P1300
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2001 Oldsmobile Alero GL 2.4L Poor Idle Quality, Cuts out, Misfire, Poor Fuel Economy VIN: 1G3NL52T71
I have an Olds Alero that I just replaced the engine in about 150 miles ago with another 2.4 from a 2000 Pontiac! It ran perfect until the other night when it rained very heavy and it started to miss very bad with white smoke coming from the exhaust! The trac ... Trouble codes: P0204 (Inj. Circuit Problem Cyl 4), P0304 (Misfire Cyl 4)
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2001 Saturn SC1 1.9L idles at 1800 rpms VIN: 1G8ZN12811
The high idle speed of engine is intermitant and happens when coming to stop and shifting into neutral or just holding clutch pedal depressed. Shutting off ignition and restarting engine and idle speed normal again. Problem could happen again when driven or no... Trouble codes: P0442, P1599, U1301
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Fixes & Summaries for GM
Fix/Summary Answers
1993 Cadillac Eldorado 4.9L light ride control VIN: 1G6EL12B3P
HI AGAIN Y'ALL!!! Well the headache is gone. IT didn't matter if the struts were plugged or unplugged. The best I coild get with the bypass kit relay was the light would.'t come on until you drve the car. When I checked the IP Inputs II11 never would chANGE EV...
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1994 Cadillac Fleetwood 5.7L A/C & Radio VIN: IG6DW52P9R
Customer brought back Caddy from Jasper Tx. today dec3rd, to do the necessary repairs. I replaced the headlamp switch as per Mark from Louisana but the light on the temp switch and radio display still remained on. Found that the seat was broken and the module...
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1993 Chevrolet Cavalier RS 2.2L Misfire VIN: 1G1JC5449P
Well we got this one fiqured out, thanks to everyone. Most replys and my gut told me it was a mechanical problem...but have to see proof. We pulled the valve cover to do another leak down test this time I decieded just to crank the engine with no plugs or v/c...
23
1993 Chevrolet C1500 Cheyenne 4.3L Pedal Travel VIN: 1GTEC14Z9P
Hello all. I received A LOT of responses for this. Thanks to all that responded. As most of you pointed out, this truck does have Rear ABS. The parts were not what I've seen before. I received alot of responses that said to check for fluid flow and br...
28
1997 Chevrolet Tahoe LS 5.7L Temp.door motor VIN: 1GNEK13R4V
Thank,s to all who replied.The problem was in the control head on the dash panel.After removing the ashtray & cig.lighter panel,I was able to access the actuator motor for testing at the connector,found no signal to actuator motor.Backtracked to control head,f...
5
2001 Chevrolet Suburban 1500 5.3L electric window VIN: 3GNFK16T61
Thanks IATN and everyone that responded. the problem was this vehical was a new purchase for my customer and he had no information on it. there was an aftermarket alarm system and aux start system and big stereo with amps and some back yard repairs done to thi...
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2001 Chevrolet Express 3500 5.7L Misfire, MIL Lamp on VIN: 1GBHG31R41
Sorry it has taken so long to get back to everyone. I looked harder at the 2 cylinders that showed a miss fire, 2+3 .I removed the timing cover to find that the timing chain was touching the reluctor wheel enough to leave gouges in it. The wrong chain set had ... Trouble codes: P0300.
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2003 Chevrolet Tahoe LT 5.3L No Start, VIN: 1GNEK13Z13
THANKS TO ALL THAT RESPONDIED. I FOUND THAT CAM SENSER WAS BAD TAKING DONE 12V REF SIGNAL CIRCUIT. UNPLUGGED CAM SENSER AND REF VOLTAGE IS BACK AND TRUCK STARTS AND RUNS. I HAVE ORDERED NEW CMP.
9
2004 Chevrolet Tahoe LS 5.3L temp VIN: 1GNEK13Z24
This one is FIXED!Alex from Georgia and Mark from Minnesota nailed it.I recieved several replies for checking T-stat and air pockets in the system,all of that checked-out ok.The fix was a missing restrictor in the radiator that had been replaced.I was told the...
9
2006 Chevrolet Impala LT 3.5L MIL Lamp on VIN: 2G1WT58K36
Most of the replys were right on with the fuel as far as the lean code goes. The customer had been using E85. The instrument cluster problem with the gauges has been an on going problem since the car was new. The dealer has not been able to figure it out and t... Trouble codes: P0171.
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2002 GMC Savana 3500 5.7L turn signals VIN: 1GJHG39RX2
I WOULD LIKE TO THANK EVERYONE FOR THEIR REPLIES, ESPECIALLY PAUL & BRENT, WHO POINTED US TOWARDS THE RESISTOR IN THE FRONT WIRING HARNESS. AFTER LOCATING THIS CERAMIC RESISTOR, WHICH WAS MOUNTED ON RAD FRAME, IT WAS CRACKED & BROKEN.GM WANTED $800 FOR THE COM...
22
2000 Pontiac Firebird 3.8L security light VIN: 2G2FS22K0Y
We were unable to communicate with BCM as all 3 replies suggested, because we don't have the right software for the job. We are a asian repair shop and only rarely look at domestics. As for the flasher/turn signal problem, one of the bulb sockets was really co...
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