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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 5, 2009
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Open Help Requests for GM
Help Request Answers
1995 Cadillac Eldorado 4.6L Stall VIN: 1G6EL12YBS
Vehicle came in with an intermittent stall and an unsteady idle. Found the tps voltage hunting up and down and the engine idle going up and down with it. Also found that GM had updtated the ckp sensors to help prevent the problem this vehicle is having. Replac...
1989 Chevrolet Corsica 2.0L Cuts out, Stall, startokstall2-3secs VIN: 1G1LT5411K
Car will run with alternator disabled.With alt. charging map voltage increase to about 2.3 volts and engine dies.noid light at inj. terminals flashes but loose inj. when connected.disabling alt. car runs great.I suspect a bad DIODE but don't see any in wiring ... Trouble codes: 42 (est in field service mode)
1993 Chevrolet C1500 Suburban 5.7L shift quality VIN: 1JMND452D2
hey all. I got a 93 suburban with a weird transmission issue. the truck shifts way to fast from 1 to 4 when warm. with a scan tool connected I can see im in 3rd gear at 20km/h. at a constant throttle the car will buck and sputter until i reach 60-70km/h becaus...
2003 Chevrolet Silverado 1500 HD LS 6.0L Right Turn Signals VIN: 1GCGK13U63
I have a code u1000. And no right side turn signals. Bulbs, etc are good. I tried a new flasher module that did not fix it - Turn signal switch is sending power to the fuse under the dash, from there it goes to the underhood fuseblock - I have no power (its a ...
1998 GMC Jimmy Envoy 4.3L blend door VIN: 1GKDT13W2W
Bought this gem for my daughter, now I gotta fix it before she gets her hands on it. I've got Auto HVAC with a blend door stuck in hot position. Did several recalibrations with no luck. Codes 0408 and 0415 return every time. Other posts indicate either bad ble...
2004 GMC Sierra 1500 5.3L valve train VIN: 2GTEK13T75
vehicle came in with noisy lifter,checked oil pressure,at idle 28lbs,while driving 60 mph at 40lbs.pinpointed noise at center of left bank valve cover,customer wanted only to replace one bank of lifters,after replacing lifters started engine and sounded fine a...
1997 Oldsmobile Bravada 4.3L transmission VIN: 1GHDT13W1V
i have a bravada with an unusual problem, when the key is on and you manually put it in 3rd gear the car will start on its own. if you already have it running and put it in 3rd gear the starter will engage. it only happens in 3rd, starts normally in park and n...
1997 Pontiac Firebird Formula 5.7L Poor Fuel Economy VIN: 2G2FV22P0V
This is one of the cleanest, most well kept Trans-Am I have ever seen. Only has 39,000 miles. One owner, garage kept, only has one problem, only gets 10 mpg in town. I have tested about everything I can think of. What I know is the ltft are + 25 both banks. Ca...
2001 Saturn SC1 1.9L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy, MIL Lamp on VIN: 1G8ZP128X1
I REALLY NEED SOME HELP WITH THIS ONE. The vehicle has come back today for the same fault, p0172 system too rich (bank 1). I have re-inspected all parts replaced and have talked with Saturn techs, they told us to replace the map sensor and inspected to see if... Trouble codes: P0172

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick LeSabre Limited 3.8L Stall VIN: 1G4HR52L3S
changed ecm fixed , vehicle now communicating and stall went away. Thanks to all my fellow members that replied.
1994 Chevrolet Lumina APV 3.1L Stall VIN: 1GNDU06D2R
Finally got back onto this one, took a fresh look at it , traced it down in a few minutes, bad pick up in dist. (damaged and loose) replaced dist assembley with new one and no more problem..,as one should assume when i said i checked power to comp. i also chec...
2003 Chevrolet Impala LS 3.8L tcc VIN: 2G1WH55K93
yes the vehicle is fixed by putting in a used unit I never did receive any more replies as to what to look for internally. My guess is that there is a crcack somewhere in the seperator plate or case that I cant see if anyone gives me future insight Ill add it ...
2004 Chevrolet Blazer Xtreme 4.3L ignition switch VIN: 1GNCS18X14
Well after cleaning out all the gunk in and around the shifter area all is well.Thanks again for all the help.
2005 Chevrolet Malibu 2.2L evap monitor VIN: 1G1ZS52F35
Thanks to Robert [...] and Corey from Snap-On and others for help. I found the tank pressure sensor to be in range,but not changing. Replaced tank pressure sensor and all is well.
2007 Chevrolet Uplander LS 3.9L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, MIL Lamp on VIN: 1GNDV23107
Thanks for the responces I did get all tests point to the VVT actuator on the cam sprocket. The Drivetime/GoDaddy.com warranty says it's not covered even though the written warranty state timing chain and gears are covered. Tell any of your customers not to bu... Trouble codes: P0016 (Crankshaft Position CKP - Camshaft Position CMP Correlation), P0011 (Camshaft Position System Performance).
1993 GMC K1500 Suburban 5.7L Excessive Emissions VIN: 1GDFK16K1P
This BEAST is finally out of my hair.(whats left of it anyhow). Thank you ALL for your suggestions. The evap sys. and pcv were eleminated early on, as well as the egr valve. It is still possible that the timing mark is off at the crankshaft, but, moving the di...
2003 GMC Sierra 1500 SLE 4.8L Poor Idle Quality, Surge, Cuts out, Stall, MIL Lamp on VIN: 1GTGC13U73
Customer has not approved further diag. We have replaced the ETC, and the problem still remained intermitently. Checked both grounds g103 and g104 they were good but still rerouted them on the firewall. Could not contact the dealer to see if there was a softwa... Trouble codes: P0220, P1518, P2135.
2005 GMC Sierra 3500 6.6L fuel overflow VIN: 1GDJC342X5
Well after a few days on the back burner, this puppy is repaired. After getting some good advice and the proper wiring diagram from William in Saskatchewan (thank you again)it was in fact the PCM that had failed. When the front tank was full the PCM was still ... Trouble codes: P2636 (Fuel transfer pump insufficient), P0462 (Fuel level performance).
2005 GMC Sierra 3500 6.6L No Start, Cuts out, fuel transfer VIN: 1GDJC342X5
Well after a few days on the back burner, this puppy is repaired. After getting some good advice and the proper wiring diagram from William in Saskatchewan (thank you again)it was in fact the PCM that had failed. When the front tank was full the PCM was still ... Trouble codes: P2636 (Fuel transfer pump insufficient), P0462 (Fuel level performance).
2002 Oldsmobile Alero GX 2.2L No Start VIN: 1G3NK52F02
Thanks for all the great suggestions. I replaced the Ign switch and ran a new grey wire to the rear of the car, bypassing the junction block under the back seat and soldering and heat shrinking it directly to the f/pump wiring. After being informed of all the ...
2005 Saturn Ion-2 2.2L Hesitation, MIL Lamp on, LOSS OF POWER VIN: 1G8AJ54F15
well thanks for the replies the vehicle has left and not returned at this time we ended up putting a pedal on it and the saturn dealer said they would replace the computer under warranty so when we hear back from the customer we will post any new information t... Trouble codes: P0651, P2135 (app sig 1), P2138 (app sig 2).
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