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Prev Professional Automotive Repair Technical Discussions for March 2, 2007
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Open Help Requests for GM
Help Request Answers
1993 Cadillac DeVille 4.9L Excessive Emissions VIN: IG6CD53B9P
I've got a Caddy really testing me, PLEASE HELP! It runs very rich, as shown in the gas readings. I've disconnected the fuel regulator hose (no sign of fuel there)& disconnected & plugged the canister hose @ throttle body. I fired the injectors individually & ... Trouble codes: P091
2002 Cadillac Escalade 6.0L ride control VIN: 1GYEK63N82
car came in with the service stability control lite on . checked codes it had a c0208 code. said something about steering wheel position circit. couldent find and info on alldata so im lost on what to do or check. any help would be great . thanks scott
1993 Chevrolet K1500 Suburban Silverado 5.7L Pedal drops VIN: 1GNFK16K1P
Customer brought this one in with a complaint of the brake pedal dropping intermittently. They did not mention the "ABS" light on and the "Brake" light flashing constantly. During the test drive, once, the pedal dropped to within about an inch of the floor, th...
1998 Chevrolet C1500 Cheyenne 5.0L Poor Idle Quality, Misfire VIN: IGCEC14M6W
i have 2 trucks with the same problem #5 missfire from idle threw 1200rpm does not miss under load new plugs wires cap and rotor compression is good on all cylinders no vaccum leaks found please help im going crazy Trouble codes: P0305
1999 Chevrolet Corvette 5.7L oil pres gauge VIN: 1G1YY22G0X
this is the 3rd oil sending unit we have put in..oil leaking out the top of the sender every time..chevrolet does not know why. oil pressure is not too high...anyone seen this?
2001 Chevrolet Silverado 2500 HD 6.6L low power VIN: 1GCHK29101
have not had alot of experience with the duramax but here are some of the test and reading which have been taken. vacuum at fuel shrader- (5 inches of vac holding 2 inches) fuel rail pressure idle- (desired 4930) (actual 5300) wot under load - (desired 31,00... Trouble codes: P0237
2001 Chevrolet Monte Carlo LS 3.4L high idle VIN: 2G1WW12E61
the vehicle runs great good power then sometimes it will idle @ 2900 rpm with no codes all connectors have been cleaned and checked twice. scanner reads idle as 2900 or so and says desired idle is 696, fuel trims good, back pressure good, ignition good, fuel s...
1997 GMC Savana 3500 4.3L Misfire VIN: 1GDGG31W1V
The vehicle is a g3500 box van with a 4.3 engine. Probably a special order because they didn't put 4.3s in g3500. The engine pings and misses randomly even at idle. the problem has existed for a couple years but it's getting worse. It sets code p1345, cam/ cra... Trouble codes: P1345
1998 GMC Jimmy Envoy 4.3L heater core VIN: 1GKDT13W4W
Customer complaint loss of heat after a few days from leaving shop to check problem. Sudden change in coolant flow through heater core inlet hose burning hot and outlet cold. Checked system for blockage, checked flow by removing hoses from core, flushed core, ...
2004 GMC Yukon XL 1500 Denali 6.0L traction VIN: 1GKFK66UX4
customer states that several times a day he will come to a stop and truck will kind of hesitate/delay when starting off. traction active light comes on on infomation center then goes off and truck goes.no codes present in any of trucks computers. we have not b...
2005 GMC W5500 5.2L No Start, Hard Start VIN: J8DE5B1675
Good Day This truck is a medium duty W5500 Cab-over diesel. It is an Izuzu 4 cylinder engine. There is no dealer in this area for this truck and there are very few of these units in this area. I am posting this for another repair shop and I am trying to help ... Trouble codes: P0405 (EGR Position Sensor out of range history code), P0400 (EGR Flow Excessive history code), P0234 (Excessive Turbo Boost Pressure history code)
1999 Pontiac Bonneville SE 3.8L transmission, steering VIN: 1G2HX52K3X
Vehicle came in with a complaint of a rubbing grinding noise in the engine compartment only when making right turns. This noise seems to be consistent with engine rpm and does only occur with turns to the right (either partial or full turns). We cannot duplica...

Fixes & Summaries for GM
Fix/Summary Answers
2001 Buick Century Custom 3.1L MIL Lamp on VIN: 2G4WS52J01
Thanks to to all who replied, all information was noted, unfortunatly when the customer was informed that we may have to put on an OE cat he declined to go any futher, if he changes his mind any new info or updates will be posted. thanks, Tim Trouble codes: P0420.
1996 Cadillac DeVille 4.6L battery VIN: 1G6KD52Y7T
i would like to thank everyone who replied. this thing was a real nightmare. i found the problem out of pure luck. i was wiggling around the wiring harness and noticed when i moved the harness behind the right kick panel the dome lights would flicker and the a...
1997 Chevrolet C1500 5.7L neutral safety switch VIN: 1GCEC14R0V
Thanks to all who responded, the customer has decided to not repair the truck at this time. If i get another crack at it I will let you all know what i find. once again thank you to all.
1999 Chevrolet Silverado 1500 4.3L No Start, MIL Lamp on, When Below 50F VIN: 1GCEC14W1X
Replaced Spark Plugs with AC Delco Platium plugs , that fix the cold no start. Thanks for all the techs that replyed just needed a different view of the problem,, .. Trouble codes: P1351.
2002 Chevrolet Avalanche 2500 8.1L calipher VIN: 3GNGK23G62
After replacing the caliphers, brake lines and multiple bleeding the brake system we went back the basic and performed the alignment again and found left caster slipped out of specs, eventhough the vehicle drove straght it was causing it to pull only when brak...
1995 Pontiac Sunfire GT 2.3L Engine VIN: 1G2JD12D7S
Thanks to all who took the time to help. But this car is a goner customer decided not to fix it and off to the yard it goes. Thanks again to all. Ed [...]
1998 Pontiac Sunfire SE 2.2L No Start VIN: 1G2JB5243W
thank you all for helping me find a fix for the pontiac sunfire it was the pcm we got a new one and flashed it and it worked like a top thank again for your input steve @ pete's Trouble codes: P0118, P0335, P0530, P1629, P0707.
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