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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for February 9, 2006
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Open Help Requests for GM
Help Request Answers
1993 Buick Regal 3.1L triggering codes fal VIN: 2G4WB54TOP
customer said car quit running and has been sitting for months. towed in battery dead charged up and car starts. ck with scanner and has about every code possible.with eng running scanner is constanly recording triggered codes. temp,tps egr, o/2,map,rpm all sh...
1996 Buick Park Avenue Ultra 3.8L Hesitation, MIL Lamp on VIN: 1G4CU5215T
Hi gang, have this repeat problem with the P102 code. It worked ok for about a year after I replaced the ECM. When the code sets, the car surges and the Traction Off light and the CEL light comes on. Just wondering if any of you have had problems with this cir... Trouble codes: P0102
1997 Buick LeSabre Custom 3.8L axle shaft seal leak VIN: 1G4HP52K7V
help!! this vehicle came to my shop after having this seal replaced 4 times previously. the lh axle shaft seal, axle shaft , reinforcement plate, side pan removed and Gasket replaced, have all been repaired. i replaced thew lh axle shaft seal, but it leaked af...
2001 Cadillac DeVille 4.6L starting VIN: IG6KF57941
checked over the vehicle and found the nothing will work correctly when problem occures. charged battery and checked all the gound and power. unable to duplicate the condition on demand. checked connection under pdc and in vehicle fuse box. connected new batte...
1972 Chevrolet K-10 307CID Mechanical VIN: CKE1421121
this thing won't stop! will barely lock up on gravel. have good vac to booster. brake pedal is rock hard(no air), falls when vehicle starts and vac. applied. my personal truck, been fighting for years. feels like not enough booster. know of other people with s...
1997 Chevrolet Cavalier 2.2L Misfire, MIL Lamp on VIN: 1G1JC124XV
Hey GM Tech's. I have this 1997 cavalier that doesn't want to go away. Vehicle origionally came in for a raw fuel smell or fuel leak. Upon checking, found #2 injector wiring connector with fuel coming out of it. Thought would be an easy Fix. Installed new fue... Trouble codes: P0300
1997 Chevrolet K1500 5.7L abs VIN: 1GCEK14R5V
hello everyone we have a 1997 chevy pick up with premature abs at low speeds on a road test with a scanner hooked up and no codes all 3 speed sensors are reading the same.I would say it happens at under 5km and the senors are reading the same. with the vantage...
1998 Chevrolet C3500 Cheyenne 5.7L Stall VIN: 1GBJC34R0W
Customer stated that this truck will strand him. Before it quits the fuel guage goes crazy then the engine dies. We havn't been able to reproduce the stall, but when the ignition is switched on the fuel guage will rapidly jump to three, or four different posit...
1999 Chevrolet K3500 7.4L fuel guage VIN: 1GCHK33JXX
had fuel guage moving jumping 1/8 tank back and forth ,put in new sender old one had dead spots in it ,better but simiular problem. shaking and rocking truck back and forth affects the guage , also has nervious twitch in needle key on engine off. Alldata isn't...
1999 Chevrolet Express 3500 LS 5.7L coolant loss VIN: 1GAHG39R7X
hello techs; this chevy van 350 engine all of sudden started white smoke out of tailpipe + eng. temp.guage went towards hot. there is coolant in the motor oil , was not overheated engine was shut off rite away. seems to run good trying to give customer some id...
1999 Chevrolet S10 2.2L high 1-2 shift, no reverse VIN: 1GCCS1955Y
I have a high 1-2 shift with a PO751 1-2 Shift Solenoid Valve Performance code and I have no reverse as well. Updated GM valve body assm with solenoids was fitted approx 15,000 miles ago for a P1870 condition and transmission operated well. I am curious if it ...
2001 Chevrolet Blazer LS 4.3L alternator VIN: 1GNCT18W41
this vehicle will sometimes not charge and will set codes 1637 & 1638.i don't know if it is related but at times the abs and brake light will illuminate and set a 265 code in the abs controller. the customer says this is the forth alternator and the abs light ...
2002 Chevrolet Silverado 2500 HD 8.1L MIL Lamp on VIN: 1GCHHK29G2
Vehicle will spin over and won't start, but if you let off the starter and try again it will always start. We think it might just have a bad cam sensor but it does not fail while looking at data on the scanner. Trouble codes: P0342 (Camshaft position sensor circuit low voltage)
2001 Oldsmobile Aurora 4.0L Poor Idle Quality, Misfire VIN: 1G3GS64C01
i have this aurora with a misfire on cyl 3 and 7. i have switched the coil/module units bank to bank, switched plugs,injectors,plug boots,electrical conn for inj,removed egr and inspecteed and ran with valve off to no avail. the misfire is noticeable only at i...
2000 Saturn SL1 1.9L MIL Lamp on
does anyone know where to find explaination of mode 6 components for gm.my genesys gives the components being looked at in numerals

Fixes & Summaries for GM
Fix/Summary Answers
1992 Buick Park Avenue 3.8L blower motor VIN: 1G4CW53L6N
Just wanted to let everyone know the blower regulator did fix this car. The reason I put up this post was because the info I had showed that the programmer was bad, but part of the test showed the signal wire should have a constant voltage when testing which d...
1998 Cadillac Catera 3.0L Electronic VIN: W06VR52R3W
first off i want to thank everyone that replied. one reply stated correctly 'don't mess around with it just put a heater core in it' we prepared an estimate for replaceing the heater core as well as the blend door actuator. the customer declined to have this...
1994 Chevrolet Caprice Classic 4.3L stumbles VIN: 1GBN52WXRR
Thank-you for your response. I was hesitatant about replacing the ignition wires. You could power jack this thing all day and not skip a beat. Customer took it to his second call shop and they replaced the wires. Took care of the problem.Alot of replies had me... Trouble codes: 0300 (random misfire).
1995 Chevrolet Lumina 3.1L temperature gauge VIN: 2G1WL52M0S
unfortunately i am not closing with a fix. we did check for a head gasket failure with a block test and it passed three times. we did pressure test the cooling system and found nothing wrong there either. we drove the car for about 25 minutes and the gauge sta...
1999 Chevrolet K3500 6.5L MIL Lamp on, hard starting VIN: 1GCHK33FOX
Thanks to all 8 who replied with good info on this problem; I referred the cusomer back to the dealer where some think they may get a warranty repair. Trouble codes: P1216.
1999 Chevrolet Express 3500 6.5L Stall, hard start VIN: 1GBHG31FOX
thanks to all who helped. It was the injection control mudole. I informed cusumer it was cheaper for them to take it to our locale GM dealer for warranty. Thank you all for making me look good to customer. Trouble codes: P1216.
1999 Chevrolet Silverado 1500 5.3L 4th gear VIN: 2GCEC19T4X
Rex [...] hit the nail on the head. The previous shop installed a molded overrun piston in a cast forward clutch piston. The molded overrun piston is about 1/16' taller than the cast aluminum overrun piston. This extra height is just enough to bind the overr...
2001 Chevrolet Tahoe 5.3L Surge VIN: 1GNEC13T91
intake manifold leak right rear found with smoke machine Trouble codes: 171 (bank 1 lean), 174 (bank 2 lean), 300 (mult missfire).
2001 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GCEK14T81
Customer didn't want to spend alot on problem so I cleaned t/body and mass air flow as I found an over oiled k&n air filter, now all trim values droped to 0 from +8 and idles very smooth and all missfires are gone, I guess that the o2 on Bank one may be starti... Trouble codes: P0131 (b1s1 low voltage), P0140 (b1s2 low activity), P0151 (b2s1 low voltage), P0300 (multiple missfire).
2002 Chevrolet Blazer LS 4.3L Rear Hatch Release VIN: 1GNDT13W02
Hi: Not a heck of alot to post on this one. Had one reply about crossed wiring during wiper replacement, but all wiring was unmolested, had a second reply reguarding the possibility of problems due to remote starter installation which was also not applicable i...
1999 GMC C1500 Suburban 5.7L steering VIN: 3GNFK16R5X
we pressure checked power steerin gpump and found low pressure at times,replaced pump and flushed system,problem solved,thank you ALL so much for your help!blas (mill rd.)
1999 GMC K2500 Suburban 7.4L Valve Lifters VIN: 3GKGK26JXX
Hi All, 1st Off thanks for the info all...It was the lifters...Had 2 on each bank of the engine...I'm not sure why they all(4) went bad @ the same time but its running very nice and quite for now. Thanks Agian
2001 GMC C3500HD 8.1L Unknown VIN: 3GDKC34G51
Thanks for the help. The dealer said they had checked the bearing adjustments. Not so, the rear bearings were 1 turn loose. This fixed the problem.
1998 Oldsmobile Silhouette Premiere 3.4L abs light-traction light- battery light on intermi VIN: 1GHDX03E7W
broken wire inside underhood fuse block - alternator circuit has orange wire s-terminal connected to alternator -this is the sense circuit used to control desired voltage under loads- this copper wire was broken inside fuse block and grounding out at times cau...
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