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Prev Professional Automotive Repair Technical Discussions for March 3, 2011
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Open Help Requests for GM
Help Request Answers
1997 Buick LeSabre Custom 3.8L Misfire, MIL Lamp on VIN: 1G4HP52K4V
car came in with lifter noise and miss-pullled valve cover and found #5 intake rocker loose-bad lifter. Pulled intake and could not get lifter out the top. pulled engine and removed cam lifter came out bottom. put in new cam and lifters-chain ok. now car has l... Trouble codes: P0300
2000 Buick LeSabre Custom 3.8L charge VIN: 1G4HP54K74
installed new compressor, oil levels right , vaccuumed for an hour and a half, added 12 ounces of 134a. High speed fans don't operate but system gets up to 185 pressure at high side then drops to 75 and at the same time low speed fans come on. I know this is n...
2000 Buick Century Limited 3.1L No Start, Poor Idle Quality, Hesitation, Misfire VIN: 2G4WS52JXY
OK this customer complained the vehicle wouldent start. He added starting fluid and got it to start and brought it in. wecould not duplicate the problem tell the next morning during no start we found good spark and good fuel presssure we noticed tand was at a ...
2001 Chevrolet Silverado 1500 LT 5.3L Starter, Inj., Dis VIN: 2GCEK19T81
owner is in construction & truck is nice condition. owner stopped at several jobs with out a problem. came out to go to lunch & truck had no crank. sec light was flashing all the time. key on/off, door open or closed. fauld codes present-p0102 maf cir sig low,...
2001 Chevrolet Impala 3.8L Poor Fuel Economy VIN: 2G1WH55KX1
Working on a 2001 Impala with a 3800 in it and the customer stated he use to get 350 miles to a tank, and is now barely getting 200. NO codes. He also stated the oil smelled like fuel. (I did not think the oil smell like fuel, and he stated he needed an oil ch...
2004 Chevrolet Impala LS 3.8L Misfire VIN: 2G1WH52K44
I have a cylinder #6 misfire under load around 2500 rpm. It idles ok runs fine until you try to accelerate then falls on its face. Dead miss found a weak coil replaced it and plug. Tried a different wire didn't affect it at all. ohmed injector 13.7 same as oth...
2006 Chevrolet Impala LT 3.9L right front turn signal VIN: 2G1WS55146
any ideas?missed something.
2006 Chevrolet Equinox LT 3.4L No Start, hesitates VIN: 2CNDL73F66
This car will not start when cold(sub zero)I can hear the fuel pump run but has zero pressure at the fuel rail. It has power draw of 3.0 amps (tested draw when new pump was installed and was 6.8 amps)when it warms to 30 degrees or better starts and runs but se...
2007 Chevrolet Cobalt LT 2.2L Power Door Locks VIN: 1G1AL55F37
Greetings fellow IATN techs. I have this cobalt that has come in for basic service, along with problems with the door locks. The complaint the customer has is that the doors seem to always lock when put in gear, don't always unlock when put in park, and doesn'...
2005 GMC Sierra 3500 SLE 6.6L Mechanical VIN: 1GCHK29295
My question is has any one had the heads cut on these trucks my loveley local machine shop cut [...] off with out telling me and sent them back i had a b gasket on both sides no do i go to a c any help would be great thanks

Fixes & Summaries for GM
Fix/Summary Answers
2001 Cadillac Seville SLS 4.6L Intermitt Nostart VIN: Y11U250960
thanks to all the replys. it turned out that the ignition switch was the problem replaced, and hasn't failed again yet, again thanks to all who replyed
2003 Chevrolet Malibu 3.1L No Start VIN: 1G1NE52J43
We ended up sending to dealer, they messed around for two to three days and finally said it was fixed but didnt gaurantee it would stay fixed. I didn't get the whole story i was helping a fellow shop with diagnosis, I believe they reset the system with tech 2 ... Trouble codes: U1000.
2004 Chevrolet Silverado 2500 6.0L Unknown VIN: 1GCHK29U14
What a dope! Beacon switch on the RIGHT hand side was on and draw is gone when pressed. In my defense there was a button on the left hand side of dash which icon appeared to be similar to a beacon but was the cargo lamp. Additionally, without a beacon, ther...
2005 Chevrolet Uplander LT 3.5L abs VIN: 1GNDX33L85
As most of the respondents indicated, the harness fixed the problem. After we cut the old one out and removed the loom, the problem was apparent. Spliced in new GM harness and all is good now. Thanks for the help.
2006 Chevrolet Suburban 1500 LTZ 6.0L 6Way Driver Seat Control Module VIN: 3GNFK16U26
Thanks so much to everyone that replied. The answer is that yes, this module has to be programmed. I also found out that some of these modules cannot be installed and driven prior to the programming as it will cause the module to lock out any new programming...
2000 Oldsmobile Alero GL 3.4L keyless entry VIN: 1G3LN52E8Y
I really appreciate everybodys help, but Richard from Michigan and Patrick from British Columbia hit the nail on the head. cycle the ignition key ON then OFF, twice, and then turn to the ON position. 2 Door locks will lock and then unlock. 3 Press the lock bu...
1999 Pontiac Grand Prix SE 3.8L Tcc VIN: 1G2WP52K8X
I pulled the side cover off in the car (it was easier than expected, took about an hour) and replaced the TCC solenoid. As stated this was already replaced with a new solenoid on overhaul. I had just done another 4T65E last week and the TCC sol that I put in t...
2002 Pontiac Montana 3.4L Hesitation VIN: 1GMDU03E2D
thank you for the help , after trying everything , took acomputer from a 2003 montana and everything was great, seems like the old computer was playing with the timing ,had computer reflashed and all is well Trouble codes: 440 (evap).
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