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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 6, 2004
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Open Help Requests for GM
Help Request Answers
1990 Buick Electra Park Avenue 3.8L Surge VIN: 1G4CW54C3L
Customer complaint of jerking at 50 mph. Had taken it to transmission shop for this problem and transmission shop rebuilt tranny thinking it was torque converter shutter. I got the vehicle and test drove, felt like a lean run miss. Problem occured at 50 mph af...
1992 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP53LON
I started only having intermittent rpm signal on scanner.I replaced the crank sensor.the car started and ran for 45 seconds then no start since. I do have square wave on crank sensor still.I have 10 volts on cam/crank supply voltage,only have 6 volts coming ba...
1994 Buick Park Avenue 3.8L radio control VIN: 1G4CW52L3R
radio controls on steering do not work correctly-audio buttons on steering seem delayed -when volume button is pressed -wait 2mins and volume goes all the way to max. same w/seek and temp control on steering. no codes/checked all components in steering inculdi...
1995 Buick Riviera 3.8L whole car VIN: 1G4GD221XS
hello techt...looking for some help please...thank you in advance...i have this vehicle that has a vibration problem at and idle. the vehicle is not missing spark or injetor wise. but the vibration is shaking the entire care...i have heard the dampers on the 3...
1989 Cadillac Eldorado 4.5L Cooling fans VIN: 1G6EL1150K
Does anyone know the actual temp that the two cooling fans should operate on this car.. One is a pusher(front)---the other a puller(rear) This one will hit 224 and both fans will engage at full variable speed..which does not seem right..at least to me..The Ca...
1993 Chevrolet Astro CL 4.3L No Start, Stall VIN: 1GNEL19W6P
started and ran after tune for about 1 mile then just died on me with no injector pulse. runs good with help from the old starting fluid. i put a new distributor on and no change i think the computer might be out of wack but i don't know where to start for a s...
1997 Chevrolet S10 4.3L Hesitation, Stall VIN: 1GTCS14X2V
after this vech. warms up you cant fully accelerate, there is a bad enough hesitation that it can barely be driven. it idles perfect and just above idle is ok. all scan tool readings seen to be ok. fuel pressure is 55 psi. weather it is goofing up or not. alth... Trouble codes: P0131, P0151
1999 Chevrolet Blazer 4.3L tcc system
we keep encountering a code p1870 trans. component slipping. Although nothing is noticeable while driving, but slip percentages are high on the scan tool,a tech2 which i also used to do a p1870 slip test, a great feature in the tech2. it engauges the conveter ...
2002 Chevrolet Silverado 2500 HD 6.6L Transmission VIN: 1GCHK23112
Hello all, This 2002 chev 2500hd with Allison trans came in with PO708 stored and staying in 3rd gear. The PRND321 indicator would intermittently work, scanner PID showed incorrectly the gear chosen. I replaced the BLACK P/N switch with the newer BROWN one, co...
1993 Geo Metro 1.0L Booster VIN: JG1MR3364N
There appears to be now power assist, brake pedal is hard and does not sink when holding pressure and starting vehicle.
1994 GMC Sonoma SL 4.3L Cuts out, Misfire VIN: 1GTCT14W0R
truck cuts out backfires between 2000-3000 rpm. timing mark on balancer does not line up with timing tab when no.1 piston at tdc.
1995 GMC Yukon SLE 5.7L No Start VIN: 1GKEK13K0S
Repeated fuel pump failures. Only abnormality appears to be an extended length of time that the fuel pump is powered up by the ECM. With KOEO, voltage should only be applied to the pump for about 2 sec. This one does it for 10-12 sec. It is not the HD model wi...
1997 Pontiac Bonneville SE 3.8L internal leak VIN: 1G2HX52KXV
client came in with oil in the radiator and about 2 quarts of oil in the coolant bottle, no signs of coolant/water in the engine oil or the transmission fluid. No external coolant leaks but all coolant hoses very swollen and dripping oil. Lower intake seeping ...
1998 Pontiac Grand Prix GTP 3.8L Stall VIN: 1G2WP5218W
hello there, i'm having some toss up about this one. my customer called in for a tow he stated that when he was getting off the highway his car started to cut off on him, so he rolled to the side and tried to start it, it would start but only runs for 20 sec. ... Trouble codes: P1629 (theft deterrent malfunction)
1992 Saturn SC 1.9L Excessive Emissions, Poor Idle Quality, Cuts out, Stall, Poor Fuel Economy VIN: 1G8ZG1479N
The car came in as a no start. The customer complained of black exhaust smoke and changed the plugs once to make it run again but couldn't keep it running. Compression check showed no compression at no.s 3&4. New head gasket, plugs and chain tensioners fixed i...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick LeSabre Limited 3.8L Air Bag VIN: 1G4HR52K9W
After I retested all the circuits and found no problems I replaced the module again and the system is working fine. How long this module will last is anyones guess. I will post any new information as I receive it.
1988 Chevrolet C1500 Cheyenne 5.0L transmission
ok this one is done most said that the rubber hose was fine ,but i noticed that the steel line that i removed had small openings almost nipple like so i replaced the intake gaskets and cut the ends off the steel line and installed them into the ruber line and ...
1989 Chevrolet Cavalier 2.8L Mil Lite on VIN: 1GJF11WXK7
Hello Everyone first let me say I hope everyone has a joyous Holiday season. Second I want to thank all of you who replyed to my help request. I have fixed this vehical. I receieved 12 replys to my request and the majority of techs who reponded pointed me to t... Trouble codes: 43 (My manual says it a Knock sensor code).
1990 Chevrolet S10 2.5L Cuts out VIN: 1GCC814E31
Yeah another winner here.Took a look at the gas tank and saw it was just removed,called owner and found out his brother had just fixed the gas gauge.Bingo.Removed tank,his brother broke all of the fuel lines doing the 'Repair',so he replaced the feed,return an... Trouble codes: 44 (vss sensor), 32 (egr).
1997 Chevrolet S10 4.3L Fuel Gauge
Unfortunately we ran out of time on this vehicle without being able to fix the problem. I'm fairly certain that the gauge was the problem this time around, but the customer needed his truck back before we could find a good used gauge to test.
1998 Chevrolet S10 LS 4.3L Excessive Emissions VIN: 1GCDT19X4W
sorry for slow reply, repair didn't go easy. 9 replys all helpful. removed upper intake and presurrized system no spraying or leaking of fuel. installed new intake gasket as recommened. got somewhat better, replaced spark plugs, improved somemore. did a fuel i...
1999 Chevrolet Malibu 3.1L coolant in oil VIN: 1G1ND52J3X
well, it was intake manifold gasket. when i remove intake notice rear side both passage inner side gasket was damage and plastic was broken. all is well car runs fine. thank you all for response.
1987 Oldsmobile Cutlass Supreme 3.8L runs on - desiels VIN: 2G3GR51A4H
Thank you all for your quick responses. The idle was indeed set too high and the idle control solenoid was also a bit sticky and did not seem to be working properly when the ac compressor engaged/disengaged so that was replaced as well. No problems since. Than...
1989 Oldsmobile Cutlass Ciera SL 3.3L No Start, Poor Idle Quality, Stall VIN: 2G3AM51N7K
Well we fixed the problem today, after we reset the ecm due to putting the new injectors in, the car ran great. We also put in a new set of plugs. and after a 20 mile test drive no hint of the problem even showed up at all. Thanks to all that responded!!
2001 Oldsmobile Bravada 4.3L transfer case
Thanks to all that responded to my help request. The problem was that when I re-installed the transfer case I plugged the front speed sensor wire harness into the rear out put propshaft speed sensor and it confused the transfer case module. So I switched them ...
2001 Pontiac Sunfire SE 2.2L start and shutdown VIN: 1G2JB12411
ok ready for this? sometimes some customers just make you want to tear your hair out. as stated batt. voltage at orange wire and ground ok. terry from florida suggested to check for voltage on purple dlc wire. should be seven volts none found. then went to che...
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