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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 15, 2014
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1999 Buick Century Custom 3.1L engine VIN: 2G4WS52M2X
no start, no spark, changed 2 crank sensor's, ign module and the computer check power & grounds at the module & computer have rpm reading from the crank sensor's no computer codes. have inj puls and starter cranks check for contunity on all related wires, chec...
2005 Chevrolet Cobalt LT 2.2L odometer VIN: 1G1AZ54F05
Replaced bcm, odometer now reading 7 miles. unable to find where to program mileage into new bcm. In the setup menu it asks if mileage is correct, if you say no, it boots you back to the main menu. latest calibration in tech 2 using pass thru procedure to prog...
2007 Chevrolet Impala LT 3.5L high idle VIN: 2G1WT55K37
After installing new throttle body, we cannot get idle relearn to work properly. We have reprogrammed the Pcm with Gm Tech 2 (twice), & attempted the relearn multiple times (per Factory relearn procedure) & the idle just wants to hang higher than normal. Actua...
2003 Saturn Vue 2.2L Fuel Injectors VIN: 5GZCZ23D93
This one was thrown on my lap, and I'm starting to understand why! This 03 Saturn Vue, which we were told ran perfectly before, was given to us by another shop that diagnosed a faulty fuel pump. The fuel pump had no pressure. We swapped fuel pump and ended up...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Chevrolet Impala 3.4L MIL Lamp on VIN: 2G1WF52E82
The owner needed the car back over the holidays for his college daughter to drive. I am waiting to get the vehicle back so I can continue working on it. Thanks for the help so far. I'll make a post in the future to let you know what fixed the car. Trouble codes: P0336.
2007 Chevrolet Cobalt LS 2.2L MIL Lamp on VIN: 1G1AK55F27
Thank you to all who took the time to respond on this one. Some of you had suggested re-learning the idle or TAC module - however on this year/model there was no procedure for idle relearn and no separate TAC module, TAC control is performed in the ECM. I did ... Trouble codes: P062F.
2009 Chevrolet Traverse LTZ 3.6L Poor Fuel Economy, MIL Lamp on VIN: 1GNER33D89
This is the shop vehicle,and like a cobblers child will have to wait it's turn in the shop as we are busy right now,and IATN is prompting me to close this post.Thanks to all that posted,we have planned to investigate the fuel system and MAF closer.We also made... Trouble codes: P2099 (lean).
1998 Pontiac Grand Am SE 3.1L No Start VIN: 1G2NE52M2W
we got out the blow dryer and heated up the lock cyl area before trying to start ao a 40 degree morn... car started and ran. Tried to sell cust ign switch with no success. Thanks to everyone who helped confirm my diag.
2004 Saturn Ion-2 2.2L Starting VIN: 1G8AJ52F44
Well the first thing I decided to do is get the customer to bring me all the reciepts from everything ever done . Seems this has been to 2 other shops and the dealer for this problem . The dealer replaced the igntion switch and the bcm . So I havent been able ...
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