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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 12, 2011
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Open Help Requests for GM
Help Request Answers
1994 Cadillac Commercial Chassis 5.7L Cuts out VIN: 1G6DW52P7R
1994 Cadillac Brougham with the LT1- These have Traction control-- symptom came to me as "car bogs down when going on expressway" from the elderly owners. Disabled the TC with the glovebox switch, and problem goes away. This TC I believe, by design does not ki...
2000 Cadillac Catera 3.0L Heater No Heat VIN: W06VR54R4Y
Hello, This is my first time asking for help on this site. Thanks in advance for any input. Need some expert Catera/opal help here. I am working on a friends 2000 Cadillac Catera. It has no heat. The car does heat up and run at the proper operating temperature...
1965 Chevrolet C60 292CID Engine swap
Thanks in advance. Customer has bad 292 original engine. He has provided a fuel injected 1997 366 with a 16 inch flywheel and adapter housing which we can not use with his existing transmission. The 366 he provided is a flangeless one piece rear main setup whi...
2001 Chevrolet Blazer LS 4.3L Excessive Emissions, Poor Idle Quality, Surge, Stall, Poor Fuel Economy VIN: 1GNDT13W81
Truck came in on hook, stalled on road and won't restart. We found it to be a bad fuel pump. replaced pump and filter. ran great for a half day now cust complaint is surging and stalling and just running bad. I tested fuel pressure and found that the fuel pres...
2004 Chevrolet Tahoe LS 5.3L traction control ? VIN: 1GNEK13Z64
hello everyone and happy holidays. I have a problem I would like some help with please.we replaced the transmission due to a noise and shift concern.this seems to have solved the problem but,vehicle came back a few days later with a customer complaint of a shi...
2005 Chevrolet Astro 4.3L Sdm VIN: 1GCDM19X15
Just a general question. Air bag light on all the time. No communication with SDM. Removed seat and found SDM damp and corroded. I know it needs to be replaced what I can not find out is if it needs to be programed or reprogramed if a use one is used and is a ...
2005 Chevrolet Trailblazer LS 4.2L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 1GNDT13S15
This vehicle came in with MIL on, DTCs P0106, P0014, and P0017. But it also had a nasty engine knock and looked like the oil had been severely neglected so we replaced the engine with a shiny new Jasper engine. Started up and ran great for about 15 mins, now w... Trouble codes: P0017 (Ckp/exhaust cmp correlation)
2008 Chevrolet HHR LT 2.4L ignition lock cylinder VIN: 3GNCA53P48
This HHR was brought in on the hook. Customer shut car off last night then remote started this morning and went out to take off when she noticed the key would not turn at all. Found an archive about the lock cylinder and houseing. Any luck out there. Shopkey d...
1993 GMC G2500 Vandura 5.7L Excessive Emissions VIN: 1GDEG25KXP
This ones a real hair puller. This van won't pass state emissions but it runs real nice. I don't have a gas analyzer except for my nose and this one smells really rich. Plates are expired so I don't really want to run it on the open road to test drive it. I'm ...
2003 GMC Sierra 2500 HD SLE 6.6L wastegate VIN: 1GTHK23103
I am not proficient at diesels but am trying to aid a customer. He had several other problems including faulty thermostat and a faulty turbo boost pressure sensor that was setting a code P0236. We monitored the sensor values and replaced the boost sensor which...
2000 Pontiac Grand Prix GT 3.8L MIL Lamp on VIN: 1G2WP52K7Y
have this car that gets +16% ltft at idle and -18% ltft while driving. it started with a positive ltft at all driving conditions. fuel system pressure test revealed a faulty fpr (low system pressure). we replaced the fpr. and also replaced valve cover gasket... Trouble codes: P0171
2002 Pontiac Grand Prix GT 3.8L Air Flow VIN: 1G2WP52K12
Customer brought vehicle in complaining that it blows cooler air on the driver's side than the passenger's side. What I discovered when I drove it is that it actually blows the same temperature air on both sides; When in the cold position (his/hers controls)...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Riviera 3.8L MIL Lamp on VIN: 1G4H5H5K4S
thanks for all the help. got my scope back and the vehicle back in finally. tested waveforms for 18x crank sig and cam sig at ecm. signal never dropped out and cam/crank error never exceeded 2 counts. 0 actually. vehicle needed another ecm. second replacement ... Trouble codes: P0341, P0342.
2000 Buick LeSabre Limited 3.8L Cuts out VIN: 1G4HR54K6Y
wow is all i can say. thanks to everyone that replied with help. so many of you was on the right track. it was the mass air flow sensor. i guess what threw me off was the car came from another shop that replaced the mass air flow trying to fix this problem. tu...
1994 Chevrolet Astro CL 4.3L left front brakes VIN: 1GNDM19Z4R
Have to close this post. Unfortunately, the vehicle did not get fixed 100%. Much to my chagrin and disappointment. However, it's much better and safe enough to drive, although a hard slamming of the brake pedal at a high speed would still make it veer sharply ...
1998 GMC K3500 Sierra SL 7.4L Emissions VIN: 1GTHK33J0W
Thanks everyone, but my customer decided to apply for emissions waiver. They spend much more than the minimum to spend and the problem still exists. Ps. Had to replace all 8 injectors because two were. It firing correctly causing the misfire. I'll open another...
2008 Pontiac Grand Prix GXP 5.3L Electronic VIN: 2G2WC55C28
thanks for the info found pinched wires from the factory on the fuze box on pass side near firewall all good to go works fine now
2006 Saturn Ion-2 2.2L ignition VIN: 1G8AJ55F16
BCM replaced and programmed with some trouble, Drove fine for 15 miles. Next time we started it, it runs for about 6-10 seconds, stumbles and stalls. Codes are P0101, P0171. They are new. Old ones P0300 and P0326 are still present. Timothy
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