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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 2, 2006
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Open Help Requests for GM
Help Request Answers
1988 Buick Skyhawk Custom 2.0L camshaft VIN: 1G4JS11KXJ
I have to replace the camshaft on this 88 Skyhawk. It has the 2.0 OHC engine. The cam is worn on one of the lobes. A special tool is required,Kent Moore# J-33302. I called Kent Moore & the tool is $750. Is there any trick that anyone knows besides buying the t...
1994 Buick Roadmaster 5.7L Surge, Poor Fuel Economy VIN: 1G4BN52P4R
we have this 94 buick that surges at idle and get poor fuel milage,on scanner we have o readind on iac motor at idle,installed new fuel pump,cap,rotor,wires and tps,we have checked for vacume leaks and have cleaned fuel injectors on motorvac system.we have wha...
2001 Buick LeSabre Custom 3.8L No Start VIN: 1GHR54K31V
Vehicle will not crank. No activation of ign 1 or starter relay. I can "hot wire" both relays, and altho it will crank, and power up the ign fuse, it still not run. The ign switch checks out ok. Security lite flashes with the door open.It is off with the doors...
2002 Buick Rendezvous CX 3.4L Volt,abs,fuel,security lights and gages VIN: 3G5DB03E72
This buick has a charging lamp on and has a security ligh on. At times the tcs and abs light come on. I found a bullitin for water getting into the body connector 305 i think, it is behind the drivers seat. i inspected it and found nothing obviously wrong with...
1997 Cadillac DeVille d'Elegance 4.6L tcs & abs lights VIN: 1G6KE52YSV
Hi GM techs, Have a steady abs and tcs lamp on. There is no data from the EBTCM. Still have to check all powers and ground but would like to know if EBTCM needs replacement can it be seperated from the modulator valve assembly in the car or does the entire uni...
1999 Cadillac Catera 3.0L Radio VIN: W06VR52R3X
the radio will only work when you shut the key off - the dome/map lights will also only work with the key off. the radio will turn back off when the door is opened as it should, but the radio never works with the key in the on/run position. i have checked the ...
1974 Chevrolet G30 Van 5.7L 3-2 shift VIN: CGY3343106
This motorhome runs great and drives very well, until you get it hot. When cruising down the highway in 3rd the trans will shift to second for apparently no reason. It's not an abrupt shift, but it slowly and smoothly shifts back to 2nd and won't go back to 3r...
1996 Chevrolet S10 4.3L Cuts out, Stall VIN: IGCCS14X5T
This truck has no codes.It runs good untill engine starts warming up then it will start cutting out or sometimes it will stall.It will start back up.When it starts acting up the brake light will come on,when brake light goes off it runs fine.I apreciate any he...
1996 Chevrolet Monte Carlo Z34 3.4L Stall VIN: 2G1WX12X7T
car cuts off at temperture when on decel or stopped like switch is cut off restarts fine when it starts continues to cut off util you let cool off does fine untill it gets back up to temp.
2000 Chevrolet Silverado 1500 4.3L readiness test issue VIN: 1GCEC14W4Y
2001 Chevrolet Venture LS 3.4L power windows VIN: 1GNDX03E81
Well, hoping someone has run into this one before. The power windows work fine unless either front door is closed. When the doors are open, the windows work. Keeping the door open, manually closing the latch in the door causes the windows to be inoperative. Th...
2002 Chevrolet Avalanche 1500 5.3L xfer case/4wd VIN: 3GNEK13T12
Replaced front and rear axle seals; had to leave Key on. Battery died; after new battery and during test drive, selected 4HI, then shifted to 2HI, cruising at 25 mph, accelerated, drivetrain felt like it was binding up, "SERVICE 4WD" light was flashing and ble...
2003 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC12F93
this car wont start. it tries a little. it seems to have fire and injector pulse when we let off the key intermittantly, also while bumping the starter. it does not seem to be a vtd problem. we have tried multiple ecotech pcms. multiple ign. modules. all power...
1993 GMC Jimmy 4.3L Excessive Emissions, Stall, MIL Lamp on
This Vehicle came in running very rich. It has lots of codes. I am at home and don't remember all info. I will add the rest of the details tommorow. The scan data shows -40 Coolant, -40 MAT, TPS 0V, MAP 0V. There is a PROM code 51. I have Replaced the PROM and...
1997 GMC K3500 Sierra SL 6.5L Cuts out, Stall VIN: 1GTHK33F3V
This vehicle stalls occasionaly when driving, usually when it's at operating temperature and has been shut off for a short period of time. The only code I have been able to find is "Turbo boost pressure sensor". It usually restarts good after a few seconds, so...
1999 GMC Sierra 2500 SL 6.0L engine VIN: 1GTGK29U7X
We recieved this truck and customer stated it heats up 240 in the afternoons. We could verify the complaint after a hard run. Check for combustion gasses in coolant tank-positive. So we removed they heads and checked for a bad gasket-looked ok. Had heads magna...
2001 GMC Yukon XL 1500 SLT 5.3L rear drive shaft seal VIN: 1GKFK16T01
this vehicle has had several rear seals on the transfer case replaced unable to find fault in seals ,bushing or slipyoke. any suggestions
1995 Pontiac Grand Prix SE 3.1L engine VIN: 1G2WJ12M9S
After 10 minutes of idle the car will begin to run hot, approx 225-240 the right side rad fan never gets power. Left side will come on with activation of AC. Checked all wires leading to relay box and up to fan plug for damage. Is there someting I am missing t...
2000 Pontiac Grand Prix SE 3.1L No Start VIN: 1G2WJ52J6Y
i have 50 lb fuel pressure, must have injector pulse becuase fuel pressure drops during cranking with f/p relay disconnected. (injector plugs inaccessible). there is no spark on any coil, i have 12v and ground to module. i replaced module twice to no avail. ne...
2001 Pontiac Grand Prix SE 3.8L no power windows no start no radio no interior lig VIN: 144UOHIGUV
car ran great one day friend drop off at auction and everything worked. went to pick it up now it wont do anything. plugged on scanner no communication no power windows wont crank no radio. checked all fuses all good. checked all battery feeds and all grounds....
1999 Saturn SW2 1.9L Unknown VIN: 1G8ZK8279X
Howdy there, We dont see many of these, the dealer gave up on it. The complaint is intermittent stall, It did it for me with the scanner hooked up, the converter stayed locked up until it came to a shuddering stop and stalled the engine. Retrieved code p1599 n...

Fixes & Summaries for GM
Fix/Summary Answers
1985 Buick Electra Park Avenue 3.8L door locks VIN: 1G4CW6935F
Most of the information I received pointed toward the key switch in the driver's door. The switches are no longer avaliable. I advised the customer I could unhook the system, she would still have the power locks from the inside door switches. The event only ha...
1996 Buick Regal Custom 3.8L MIL Lamp on VIN: 2G4WB52K2T
This one is fixed. I was surprised at the lack of info provided by repair software on a code P0441. It ended up being the EVAP purge solonoid and vac. switch. I also checked the charcoal canister, it was fine. Thanks for the help. Trouble codes: P0441 (No purge flow), P0141 (O2 heater B1S2).
1999 Buick Park Avenue 3.8L air bag VIN: 1G4CW52K6Y
I would like to thank everyone for the excellent info. The BCM did need to be programed so that it could communicate with the other modules in the car. After talking to vetronix i learned i could do it with the master tech. In GM body control/f8-SIR/f4-OBD con...
1992 Cadillac Eldorado 4.9L ride control VIN: 54SDF64G6E
thanks to all i went with changing over the struts they didnt have the money but there good people and payments will work thanks again
1990 Chevrolet Lumina 3.1L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 2G1WL51T4L
Well, i`m sure everyone had a customer situation at one point in time as I have. Thanks to Martin Smith, Jay [...] f... Trouble codes: 33 (MAP sensor high).
1993 Chevrolet G30 Beauville 5.7L Hesitation, Cuts out, Stall VIN: 2GBHG31K2P
Upon further diagnosis we took off the throttle body and put a rebuild kit in it, just for a lack of better things to try. When we put it back on, the IAC would not respond and the engine was stuck running at 1100 RPM. We then put a new IAC on and gave it a tr...
1998 Chevrolet C2500 Suburban 7.4L rear axle seals VIN: 3GNGC26J8W
Hello and thanks to all who replied. Most replied to check for clogged vent, I neglected to say this was already checked and was OK. There is a bearing and seal available from NAPA that has a reengineered bearing that allows for space for an oil slinger. We ne...
2001 Chevrolet Silverado 2500 HD 6.6L Lighting VIN: 1GCHK29171
Evening everone, I did not myself fix this one but after many explanations from members on how this system works, I still had no idea how this system works. One said that after 2000 the brake lamp circuit is no longer controlled by the turn signal switch. Othe...
2003 Chevrolet Avalanche 1500 5.3L Misfire VIN: 3GNEK13T42
thanks for all responses.fuel pressure and repeat clogged injectors were the most prevalent thoughts. this one, however, suffered from 'installed' problems. when the truck first came in, my tech checked for spark on the offending cylinders. the wires fell apar... Trouble codes: P0300.
1994 GMC K2500 Sierra SL 6.5L MIL Lamp on VIN: 2GTFK29S1R
Well as most replies stated, the wire from the egr solonoid was broken and breaking contact. Thanks for all the help. Trouble codes: 33 (Egr barometer low volt).
2000 GMC Yukon Denali 5.7L mastercylinder VIN: 1GKEK13ROY
Dealership replace the brake booster and problem is solve.customer has driven more than 100 miles so far without any problem. thanks for all the feedback
2003 Hummer H2 6.0L door ajar warning VIN: 5GRGN23U43
Thanks for the three replies. Seems like H3 experience is scarce. The BCM was bad. Yes,any GM dealer can flash it. Had to go through a song and dance as they seemed to look at it as if it were possesed. All is well again and I don't have to worry about my budd...
2000 Oldsmobile Alero GL 2.4L Hesitation, Surge, Stall, Misfire, MIL Lamp on VIN: 1G3NL52TXY
Found timing chain off tooth from a tech in oregon who had replaced the water pump. The exhaust was retarded one tooth. Thanks to who all replied. I cant beleive a customer would take a vehicle running this way after repairs #1, #2 how can a customer get into ... Trouble codes: P0300.
1995 Pontiac Firebird 3.4L Hesitation, Misfire VIN: 2G2FS22S6S
Arthur from Texas was right on the money. After engine got hot #3 coil broke down and had no spark at plug wire. I can't think of anything else to tell. IATN says I don't have enough info. Thanks to all.
1998 Pontiac Firebird Firehawk 5.7L headlights VIN: 2G2FV22G8W
Thanks to those who responded. We found a pinched wire loom at the Right Headlight door assy that allowed power from the running lights to bleed over to the door activation relay. Both headlight motor assy's replaced due to unrelated issues.
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