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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 29, 2015
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Open Help Requests for GM
Help Request Answers
1990 Buick Riviera Luxury 3.8L Stall VIN: 1G4EZ13C1L
hi everyone, this car has been in the shop for a couple days with very intermittent stalling condition. the car will stall without any warning at all and doesn't always happen in the same way sometimes a short buck or hesitation is felt before the car stalls, ... Trouble codes: 26 (quad driver module)
1989 Chevrolet Camaro Iroc-Z 5.0L high idle VIN: 1G1FP31F3K
Vehicle came in with idle sticking high. Inspected the throttle body, took off all the cables, tbi seemed O.K. with engine off. After starting engine, throttle stuck high & won't return to close position! After stopping engine, I noticed the throttle plates cl...
1991 Chevrolet Lumina Euro 3.1L Poor Idle Quality, Surge, Stall VIN: 2G1WN54T6M
having trouble with this one. Car was owned by the little old lady, with the usual short drives. not sure if the problem was there and for how long. customer has had the car for a couple year, and say it has been doing this since they got the car. Car will idl...
2010 Chevrolet Impala LS 3.5L all shifts VIN: 2G1WA5EK0A
I replaced the transmission in this 2010 Impala because it was brought to the shop with loss of drive, found broken band and shavings in pan. A used unit was installed, tag said it was from a 2011 Impala. The vehicle now sets a p0961 within a few seconds of st...
1996 GMC K2500 Sierra SL 5.7L spark VIN: 1GTGK24R6T
When problem occurs has no spark coming from distributor cap and has good spark at coil. When you unplug the coil wire from the cap it and plug it back in it will start tried new cap, rotor and wires several times with different name brand stuff and problem st...
2004 Pontiac Grand Am GT 3.4L Hesitation, Surge VIN: 1G2NW52E24
Vehicle has severe hesitation and surging under load and worse at 35-45 MPH. No stored DTC'S. Test drive with Tech 2 installed and ST fuel trims are normal. Labscoped TPS,Substituted known good MAF. Installed test port in exhaust downpipe and drove and monitor...

Fixes & Summaries for GM
Fix/Summary Answers
2003 Chevrolet Impala LS 3.8L MIL Lamp on VIN: 2G1WH55K13
sorry for the delay. i havent heard back from the customer so im assuming the MIL hasnt come back on. im sure the after market cat is working on the borderline of specification. and my opinion [...] be that warming the engine back up got the fuel trim correct en... Trouble codes: P0420, P0128 (Coolant thermostat below reg temp).
2009 Chevrolet Impala LTZ 3.9L 2-3 shift VIN: 2G1WU57M09
I had the transmission module replaced and still had the same issues. I was fairly confident there was an internal problem with the 3rd gear issue. Went ahead and replaced the trans. and that solved all issues. Thanks
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