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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 19, 2009
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Open Help Requests for GM
Help Request Answers
2001 Buick Regal GS 3.8L overdrive VIN: 2G4WB55K71
customer says trans recently stopped going into o-drive. ran on rack, scanner shows current gear info confirming trans has shifted into o-drive, but rpm's dont change. has solinoid test thru scanner]modis], and can hear solinoid working when commanding to go i...
1997 Cadillac Eldorado 4.6L blower VIN: 1G6EL12Y7V
This is my own personal car and the blower stopped working last night. Something burned in the car. The smell was electrical. But couldn't see the smoke because it was dark. Checked the blower this morning and have power on the red and ground on the black wire...
2000 Cadillac DeVille 4.6L tcc VIN: 1G6KF5791Y
hey everyone thank you for taking the time to read this. we have a customer's vehicle that intermittently throws these 2 codes, p0741 p1860, about once every two weeks or so. when i test the tcc system it always tests out good. no loss of signal through the wi...
1991 Chevrolet Corvette 5.7L No Start, Stall VIN: 1G1YY2381M
Car cames in on wrecker. Owner has installed 2 fuelpumps and a regulator and still no pressure. I started testing and found no power to fuel pump fuse. jumped 12v to pump and it runs but the car cranks and dies after about 10 secs. Then if you try to restart i...
1993 Chevrolet C1500 Silverado 4.3L No Start, Poor Idle Quality, Cuts out, Stall VIN: 1GCDC14Z9P
This truck came into our shop last week with a complaint of hard to start and poor running. We could barely get it to run long enough to get it into the shop. Start then die start then die. I had a tech check the fuel pressure and flow, 10-12 psi and good stre...
1994 Chevrolet C3500 6.5L no gears VIN: 1GND43L56W
This is a relatives tow truck he called me saying it wont shift into any gear.He replaced the sensors and that did nothing.Now it will move but wont shift.Ive yet to look at it. I was hoping some one out there seen this problem before.It just stop shifting and...
1996 Chevrolet S10 LS 4.3L Stall, trans. shift VIN: 1GCCS19WXT
HELP...if I look under abs or under obd-2 gen. speedo readingmatches the odometer, and seems to be accurate. If I look under datastream by application vss is really off.. like at 60mph. vss reading is 6 didgets 132,697.. called my gm parts man and there is no ...
2000 Chevrolet Venture 3.4L brake lamps VIN: 1GNDX03E9Y
have this problem with brake lamps always on after unplunging brake lamps switch cruise control switch and couple other switches and they still stay on. can anyone tell me what i could look for? i know it is a short in the wiring somewhere. any hints on where?
2003 Chevrolet Tahoe LS 5.3L No Start, no start inter. VIN: 1GNEC13Z13
this taho belongs to a used car dealer so i dont have any history on it customer called and said he thinks the fuel pump has gone bad that would turn over but wouldnt start when tow truck got here with it it fired right up. with no mil on so we restarted it a... Trouble codes: P1626
2004 Chevrolet C4500 Kodiak C4V042 6.6L MIL Lamp on, trans. in fail safe VIN: 1GBE4C1235
Thank you in advance, has anyone seen this problem?? it may take a day or it could be a week but the pcm will loose the signal from the input speed sensor on the allison trans. and go into fail safe.. this is a carpet cleaning company and a pto drives there sy... Trouble codes: P0716, P0717
2005 Chevrolet Equinox LS 3.4L power assist VIN: 2CNDL63F35
Car was hit in a parking lot no body damage the force was to the front left tire (not rim) After the wreck the electronic powered assist steering become tight would not return on its own and the steering wheel shakes left to right when you turn a little either...
2008 Chevrolet Suburban 1500 LT 5.3L Unknown VIN: G3NFK16318
cannot achieve proper brake pedal. replaced front brake pads, front brake rotors, and rear brake pads. all inner pads had worn faster than outer. collapse piston in calipers by opening bleeder on caliper and using c-clamp. vacuum m/c brake resovoir empty and r...
1998 GMC C3500 Sierra SL 6.5L Poor Idle Quality, VIN: 1GDKC34F2W
Have a concern with pcm suppling 5 volts on both app2 and app3 signal lines. Connector C1 on Terminals D4 and C5. I have tried 2 other "remmaned pcm's" with same out come. Have cut the 3 signal wires at pcm, voltage readings on APP side show correct, still 5 v... Trouble codes: P1125 (app crkt problem)
2001 GMC Sonoma SLS 2.2L Hesitation, Cuts out, Stall VIN: 1GTCS19S41
Need help from you GM techs out there,Have a 2001 GMC Somona 2.2L automatic.It stumbles,and has no power under load,does not die,starts fine,does ok if you ease into the accelerator pedal.I did a fuel pressure test(55psi)ok,unbolted the exhaust,no exhaust rest...
2004 Pontiac Grand Am GT 3.4L cruise VIN: 1G2NF52E24
checked everything i know to check and finally replaced the cruise system under the hood. the cruise will set and stay on for a average of about 30 mins then it acts like you hit the brake, you can reset the speed and it will work for a few mins then it diseng...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick LeSabre Custom 3.8L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1G4CU5215R
Wow, what a mess. We checked every wire from the icm to the ecm to the crank and cam sensors with no problems...We replaced the pcm and one coil (cyl 2 and 5) and crimped the connector terminal for the crank sensor synch signal(yellow wire) so it would have a...
2005 Buick Rendezvous CX 3.4L 2-3 shift VIN: 3G5DA03E55
Thanks for all the help guys, sure enough the trasmission slips going into 3rd. We are just replacing the unit with a NEW one Thursday.
2001 Chevrolet Venture LS 3.4L Starting VIN: IGNDXO3E21
thanks to all of you,for this help,i star the car by change the ignition swith,that what the problem.
2006 GMC Sierra 3500 SL 6.0L air bag light VIN: 1GDJK34U66
Thanks to all who helped. Dave the module WAS covered with salt,but a new module did not fix the problem. Mark your run down of the wiring is what lead us to the fix.The tan and black wire had a break inside the wire. THIS TRUCK IS USED TO SALT SIDE WALKS IN T...
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