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Prev Professional Automotive Repair Technical Discussions for September 21, 2012
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Open Help Requests for GM
Help Request Answers
1999 Chevrolet Tahoe LS 5.7L wheels VIN: 1GNEK13R5X
I do not believe that the slight amount of ball joint play is the cause of the wander condition (although I do intend to sell it). This Tahoe is not equipped with an electronic orifice for variable steering. The power steering is the standard pump and gear typ...
2004 Chevrolet Silverado 2500 HD 6.6L all ecu VIN: 1GCHK23194
customer left windows open during a rain storm, now has no comm w/ several modules such as tcm and abs. I replaced ipc which took care of bcm u codes. if anyone is familiar with water damaged ecu's I would appreciat any input. i unplugged modules and pulled f...
2006 Chevrolet Silverado 1500 LT 4.8L blend door VIN: 1GCEC19V46
hi everyone, this is my truck and it just started doing this about a week ago. ac blows cold at all vents, then all of a sudden drivers side vents blow hot. the only way to get it to blow cold again is to shut off truck and restart then all is fine for a few m...
2006 Chevrolet Cobalt LS 2.2L MIL Lamp on VIN: 1G1AK15F46
This one is silly. I believe I covered all the bases here. I also replaced intake manifold gaskets/o-rings and filled intake with gas{out of the car of course ) no cracks or leaks found. Air inlet tube checks out good also.MAP/BARO pressure sensor seems to wor... Trouble codes: P0171
2008 Chevrolet Express 3500 6.6L Cac Piping VIN: 1GBJG31688
Wanting to check around and see if any body else has run into this problem. First off i am posting this for a friend that's having problems. His van has blown the cac tube off the turbo repeatedly. The first time it happend he took it to the dealer and they cl...
2005 GMC Safari 4.3L Misfire, MIL Lamp on VIN: 1GKDM19X65
I have an 05 Astro. Just installed a new jasper 4.3 and an install kit. Engine ran fine just the thrust bearings were bad. I now show misfires on #1 and #4 cylinders but only @ 2000-3000 rpm free reving or light or heavy load. The vehicle does not feel or appe... Trouble codes: P0300
2005 Pontiac Grand Prix GT 3.8L MIL Lamp on VIN: 2G2WS52205
vehicle came in with multiple codes, poor idel quality, surge on acceleration, progressive loss of power, misfiring, and intermitent stalling. checked TSB's, found one for p0300 recomended reflash and updates for comp. did that, replaced cat, HO2 S1 B1, and MA... Trouble codes: P0134
2008 Pontiac G6 GT 3.5L Misfire, MIL Lamp on
This vehicle came in with the engine light on. Only missfires at idle. Scanned the computer and pulled a p0302 code. Cylinder #2 is missfiring on the missfire counter on the scanner. Inspected ignition system. I have spark at plug and I even swapped plugs to m... Trouble codes: P0302

Fixes & Summaries for GM
Fix/Summary Answers
1996 Cadillac Seville SLS 4.6L Excessive Emissions VIN: 1G6KS52Y7T
Thank you to everyone that lent a had in my ask for help. I learned a couple more things about emissions in your replys. I ended up putting upstrem O2 sensors and spark plugs in the cadillac. The HC dropped enough to make it through the test. 41@ 15mph and 31...
2001 Chevrolet Impala LS 3.8L no start/no crank VIN: 2G1WH55K51
It turned out to be an intermittant poor brush contact on the armature which resulted in a 'no ground' condition for the solonoid...thanks everyone !
2004 Chevrolet Tahoe LS 5.3L transfer case VIN: 1GNEK13Z54
Thanks you for your quick responce everyone! Alot of people stated motor/switch assembly. Some mentioned grounds. We preformed a drop test over the ground located at the frame left side where the body mount is right under the driver feet. there are two seprate...
2006 Chevrolet Silverado 1500 HD LT 6.0L No Start, Stall VIN: 1GCGC13U86
Well this one made me feel dumb, at the advice of a fellow tech i turned my attention to the fuel system. Pulled the injectors and fuel rail to make sure they were actually firing. they fired ok not the greatest spray, but we noticed there wasnt a gasoline odo... Trouble codes: P0101, P0300, P1626 (Vehicle Theft Deterent passlock active).
2009 Chevrolet Impala LS 3.5L Air Bag VIN: 2G1WB57K59
Thank you all for your help. I was able to get the Air Bag system working. Wish I would have posted here first, instead of thinking I knew what was going on. After reading the posts, I unplugged and plugged in the 2 "2" wire connectors under the passenger se...
2003 Oldsmobile Alero GL 2.2L Accessories VIN: 1G3NL12F93
I Haven't completed the job on this one because the owner hasn't had a repeat occurrence since her original complaint. I am sure it will happen again though because I haven't seen one fix itself yet. Thanks for all your input!
2002 Other GM workhorse 5.7L Poor Idle Quality
Thanks to all for your help.I could not get info from my veris scanner. I borrowed my friends tech 2 and found the iac was at zero.Still it did not have any codes. Checking the harness i found a broken wire. Repaired the wire and fined the problem. Thanks agai...
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