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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for February 7, 2012
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2007 Cadillac Escalade 6.2L Charging VIN: 1GYFK63837
Hey guys, Here I am stuck with this Escalade. My customer said it wouldnt turn on. We went over to where she had the car and checked the battery which was dead, no power to the car at all. We replaced the battery with a new one and it turned on with no hesit...
1998 Chevrolet Venture 3.4L Excessive Emissions, Poor Idle Quality, Surge, Cuts out, Stall VIN: 1GNDX03E1W
Since that repair my idle went to normal but when warm starts to stall n excessive emissions start to buil up n engine dies before comin to stop noticed when unplugin iac engine idle went way up but that's the only way I can drive this monster n it won't stall...
2001 Chevrolet Tahoe 5.3L No Start
Dash, p.r.n.d. Life's on at all times, unless ign o fuse pulled. I can communicate with all modules PCM shoes PCM , bcm , vcm communication failure. Has t.p.s. code bypass 5 v ref. to signal still shows o on scanner. Electronic throttle does not open. Replaced...
2002 Chevrolet Trailblazer LS 4.2L No Start VIN: 1GNDT13SX2
Customer complaint, hard starting when hot, after it sits for a while will start. Upon road test, to warm up vehicle i notice my temp gauge was not moving, and scanner was reading, 45 degrees f. Unpluged sensor and checked 5 volt ref., ok. Plugged sensor back ... Trouble codes: P1523 (Throttle set position)
2003 Chevrolet Venture LS 3.4L tps VIN: 1GNDX03E93
vehicle came in with po121 tps performance,it was jerking when accelerating.I replaced tps and now it has a very high rev.it has 5 volt referance,low volt referance,about 2v at idle and the ground is good. It shows tps % at 35 when in closed throttle position ...
2004 Chevrolet Cavalier 2.2L No Start, Poor Idle Quality VIN: 1G1JC52F04
I am attemping to get this cavalier to idle when it is cold . When the engine is cold the iac counts are 0 and you must be the iac. At this time the car runs extreamly rich (black smoke ) After about 5 min the car will begin to take over idle control the iac c... Trouble codes: P0506, P0507
2004 Chevrolet Silverado 2500 HD 6.6L No Start, MIL Lamp on VIN: 1GCHK23114
veicle will not start except on ether customer has put gas in the fuel thats when these problems started recommended fuel injector pump due to low pressure 580psi cranking with new pump 650psi please help thankyou in advance codes 0087 0101 0102 0202 0203 020...
2005 Chevrolet Silverado 3500 6.6L exhaust clamp VIN: 1GCJK33215
Just some general information. We tightened up the clamp to begain with and that would last about a week. We tried that two different times. Finally the customer went to GM and got a new clamp. We installed that and it lasted about three weeks. The problem we ...
2009 Chevrolet Silverado 3500 HD LT 6.6L MIL Lamp on, Delayed turn off VIN: 1GBJC84689
This truck has a delayed turn off, you can take the keys out of ignition and it will keep running for at least 15 seconds. Mitchell doesn't give good diagnostics and if i un plug bcm truck dies. Replace bcm and still has same problem.if the tech 2 is pluged in... Trouble codes: B1440 (Ignition mismatch)
2008 GMC Yukon XL 1500 SLE 5.3L door locks VIN: 1GKFK16388
Hi all ! Customer brought vehicle in complaint, Only drivers door lock operates with key fobs or by operating drivers door lock button, there are no codes in any of the computers. Also factory remote start not working. checked all fuses . When we try yo comman...
1999 Oldsmobile Silhouette Premiere 3.4L Steering gear/Pump VIN: 1GHDX03E8X
Thanks in advance for help with this one, this vehicle came into shop with leaking steering gear, p/s pump, and both hoses, all were replaced, (and yes I know what everybody is going to ask)they were replaced with A1 Cardone units and gates p/s hoses. Steering...
1995 Pontiac Grand Am SE 3.1L Hesitation, Cuts out, Poor Fuel Economy, hot exhaust
Well, I have this grand am that idles decent now that I tuned it up, but same as before the tune up, when load is increased, it falls on its face. I have done a fuel pressure test at idle and the pressure and volume are good. I have not checked them under a lo... Trouble codes: 28 (trans range sensor error)
1997 Pontiac Firebird Formula 5.7L sparkplug threads VIN: 2G2FV22P5V
I have a Firebird in the shop that the spark plug blew out of leaving very few threads. Of course it is the number 8 plug. Always the easy ones. Anyway the machine shop tells me the head will come off with the engine in the car. Has anyone had success with a t...
2008 Pontiac G6 GT 3.9L Air Delivery VIN: 1G2ZH36168
Car comes into shop not blowing out of ac vents when adjusting to that position. Has code for actuator b0248, can disconnect battery for a few seconds reconnect and everything works good, switching to all the positions. Check with scanner and watch the door op...

Fixes & Summaries for GM
Fix/Summary Answers
2007 Cadillac CTS 2.8L Power Steering VIN: 1G6DM57T57
Thanks for all the help. It turned into being 2 problems after finding out more about history, the car was in a accident and there was a crimped line also there was a rack issue after repairing the line.
2000 Chevrolet Blazer LS 4.3L 4WD operation VIN: 1GNDT13W0Y
Vehicle finally came back. Installed new encoder switch with same results. With a calm and clear head reinspected all components and signals. The tccm conector is no longer avail. so I had to use same connector housing with different terminal inserts. One o...
2002 Chevrolet Monte Carlo LS 3.4L security/radio/inst panel VIN: 2G1WW15EX2
Thanks to all who responded! The bcm relpacement was the fix! This car is gone,and i regain my sainity.That is until next time!lol regards Ari.
2005 Chevrolet Silverado 1500 HD LS 6.0L Encoder Motor VIN: 1GCGK13U35
Thanks to all for taking the time to reply. Once again sorry for the delay, wanted to meake sure the truck was going to stay gone. So far so good. I replaced the last thing left in the system, the TCCM. When I took it down to the dealer, the tech told me h...
2008 Chevrolet Cobalt LS 2.2L P0171 Lean VIN: 1G1AK18F38
Hey friends. I have this one fixed thanks to the guys and gals on IATN setting me on the right course. I have this wonderful smoke machine that gathers plenty of dust. I got it down and blew it off. I unplugged the vacuum hose from the purge valve and star...
2006 GMC Sierra 1500 SLT 6.0L MIL Lamp on VIN: 2GTEK13N36
Well this one will be a mystery for me. Order there part and she never showed up, must of sold the car. Got the pedal and the module, but no truck to install it in. If they do one day decide to come back, I will update this. Trouble codes: P1125 (TP/APP sensor circuit), P2125 (APP sensor 2 circuit).
1995 Oldsmobile Aurora 4.0L Mechanical VIN: 1G3GR62C3S
Amazing the majority of you guys are awsome, the head bolts were stripped & came off as you said, we recommend new engine, but for the age of the car its not worth fixing it, custmoer decline the repair & i dont blame him,,,Thanks to all of you
2001 Pontiac Grand Am GT 3.4L Unknown VIN: 1G2NW12EX1
i guess i over thinked this one a little bit, i think what threw me off was the security light staying on steady.. i removed the bcm on a cold pennsylvania morning and found about a 1/4 inch of ice in it. i cleaned it all out and dryed it and i didnt see any s...
2006 Pontiac G6 GTP 3.9L Misfire VIN: 1G2ZM15166
Determined problem is due to an exhaust valve/spring/guide issue. Recommend removal of head. Customer is going to save up for repair.
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