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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 6, 2008
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Open Help Requests for GM
Help Request Answers
1998 Chevrolet Metro 1.0L MIL Lamp on VIN: 2C1MR2269W
Thanks to all who reply. This metro came in w/ck. eng. light on. p0420 cat. code. Cat. has been replaced sometime in the past. Checking o2 readings w/ scantool, I find hos2 voltage @1.25v. unchanging. I'm not sure what diagnostic to use for that. Please wak... Trouble codes: P0420
2006 Chevrolet Impala LS 3.5L heater VIN: 1GTSM3697A
hey gm guys ihave a 06 impala this car will blow luke warm air out the vents but if you raise it off idle it gets red hot thought maybe a flow problem but the pump is ok no leaks no restictions.some guys say its not full but it has never been apart and noleaks...
1999 GMC K1500 Sierra SLE 5.7L No Start VIN: 1GTEK19R3X
THANKS TO ALL! I have this 1999 GMC 1500 PU with a 5.3 and it will not start when it is wet or cold! It is getting fuel and spark, But will not start, unless I put a blow dryer on the distributor! and there are NO codes.
2000 GMC Sonoma SL 4.3L drivetrain VIN: 1GTDT19W1Y
i have not had very much experience on 4wd vehicles-especially noise or howling coming from the drive train as the truck is driven-the noise starts on takeoff and is noticeable right away-when i shift from 4wd to 2wd it does not change any-when i go to 55 mph ...
2004 GMC Envoy SLE 4.2L transfer box VIN: 1GKDT13S54
This system worked fine till one of my employees moved the car. he swears he did not do anything adverse. the service transmission lamp is illuminated all of the time. The position lamps on the modes selectors light up at engine start up, but go off when runni...
2006 GMC Sierra 1500 SL 4.3L No Start VIN: 1GTEC14X06
This truck will not start. Fuel pressure is O.K. Injectors are firing. It has no ignition fire. The coil is not being grounded by the PCM. It has 12 volts on the power side but no signal on the ground side all the way back to the PCM. This company has a servic...
1999 Saturn SL2 1.9L Hesitation, Surge VIN: 1G8ZK5275X
HELLO EVERYONE HOPE EVERYONE HAS A GOOD CHRISTMAS SEASON WITH GOOD HEALTH. Down to business. After the fuel pump and filter was replaced, the car now has plenty of power and able to go at highway speeds with no problem, however we have an annoying surge in the...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Buick LeSabre Custom 3.8L Mechanical VIN: 1GH23RT130
First of all many thanks to everyone who replied. By removing the spark plugs we found the engine was hydro-locked. Engine coolant was found in cylinder #4. We determind the lower intake was leaking. The customer requested to replace the head gasket since we ...
1997 Buick LeSabre Custom 3.8L engine VIN: 1G4HP52K3V
thanks for all the replies some of them directed to water problem, and some of oil problem. most in the plastik manifold. we decided to return the vehicle to customer and when he will bring it back we'll check what gathered on the plugs, water or oil. thanks a...
1998 Cadillac DeVille 4.6L Speedometer
This is one for the books. This problem stumped iatn, identifix, a GM dealer garage, a Cadillac dealer tech, and a knowledgeable car electrical specialist who often deals with dash problems. The key to this problem seems to be the 16 volt VF signal that no on...
1998 Chevrolet S10 4.3L no heat VIN: 1GCCS14XZW
Thank you for the tips guys I ended up replacing the heater core again and doing an agressive flush bypassing the radiator & heater core. Also removed and replaced thermostat (3rd time) I could not believe the amount of rust flecks and sludge I filtered out of...
2003 Chevrolet Suburban 1500 LT 5.3L Unknown VIN: 1GNFK16Z83
First, thanks for all the good replies. I ended up clearing some sediment from master cylinder resevoir ports. Flushed and bled the brakes completly again. They seem to be working fine so im having the customer take it and see what he thinks, put it to the "ac...
2005 Chevrolet Aveo LS 1.6L strut mounts VIN: KL1TD52625
hey all not much response on this one. what i did to fix it i would not recommend unless you have to. i got new upper mounts from napa (dealer says 2weeks to 1 year for parts daewoo) and i installed them upside down. the mounts seem to fit better this way....
2006 GMC Envoy SLE 4.2L No Start, Misfire, MIL Lamp on VIN: 534811GKDT
I checked for a bad ignition switch as suggested and when I rechecked the fuses I noticed the fuse block under the hood was LOOSE!!I didn't loosen it and I suspect it was that way from the factory.Taking the cover off and pulling the fuel pump relay must have ... Trouble codes: P0300 (multiple misfire), P0443, P0506, P0787, P0973, P0976 (shift solenoid B control circuit low).
1991 Oldsmobile 98 Regency Elite 3.8L Poor Idle Quality, Misfire VIN: 1G3CW53L8M
The problem turned out to be a defective Carquest module. I was finally able to induce the miss by tapping on the module while it was running. Most of the replies suggested module and/or ECM and/or cam/crank sensor problems, and also wiring harness issues. I t...
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