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Prev Professional Automotive Repair Technical Discussions for July 16, 2009
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2003 Buick Park Avenue 3.8L A.B.S. module VIN: 1G4CW54K33
I run this help request once before and was closed before the customer brought the car back but what it does at higher speeds when you first hit the brakes it goes into abs braking for a split second then stops fine when I pulled the abs fuse the condition wen...
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1993 Cadillac Seville STS 4.6L HVAC displays VIN: 1G6KY5291P
Wife's Car (so is urgent) not all the time but more frequent HVAC displays go "--" dashes, first to go is outside temp reading (on right display) then left fuel data display goes out "--" dashes, then rest of screen on right display goes out "--" , HVAC system...
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2002 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y42
Hi everybody! Thanks in advance for your help. 3 months ago, this cadillac came in for lack of power and for check engine light. The code was for secondary air injection problem on bank 1. The car was tested, and yes, it lacked power. The air check valve was p... Trouble codes: P0410, P0420, P0420
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2000 Chevrolet S10 2.2L Hesitation VIN: 1GCCS1957Y
posting for another tech in shop. engine was pulled due to rod spun, afterwards the truck has developed a severe intermittent tip in hesitation. monitering scan data, the truck goes into open loop,the a/c comp cuts off,tp at 9%@,71 v, map fell to 4.7 v ,477 rp...
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2002 Chevrolet Silverado 1500 HD LS 6.0L Poor Idle Quality, Misfire VIN: 1GCGK134U5
Thanks in advance for any replies. This ones got me scratch'n my head. 02 Chevy Silverado 6L, engine code U. Idles rough, intermittently, does not set a misfire code but on Tech 2 Scanner misfire graphic, all cylinders will show misfire intermittently. Fuel tr...
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2003 Chevrolet Silverado 2500 6.0L abs/air bag light VIN: 1GCHK29UX3
TRUCK CAME IN WITH AIR BAG LIGHT ON. SCANED AIR BAG AND GOT U1000 CODE. wENT TO ALL MODULES FOUND WE COULD GET A DATA STREAM FROM ALL EXCEPT ABS MODULES. WITH KEY ON ENGINE OFF THERE IN NO ABS LIGHT ( THAT IS NO YELLOW OR RED BRAKE LIGHT; EVEN WITH THE EMERGEN...
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2003 Chevrolet Corvette 5.7L Stall VIN: 1G1YY12501
thanks in advance this zo6 will run ok then it will cut out the c.e.l traction control, air bag. the info display says service trac assist,service air bag,abs,the dash lites flicker like i am loosing power or ground. i have checked power and grounds all are go...
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2003 Chevrolet Venture LS 3.4L Key is not learned by pcm VIN: 1GNDX03E53
Is there any way I can have a certain wave from too the pcm that I know its going right and to pcm for relearn.??? or suggestions.Thanks
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2007 Chevrolet Malibu LS 2.2L Misfire VIN: 1G1ZS57F37
This Malibu missfires under a moderate acceleration usually after rolling through a corner and then accelerating at the apex. Watching the missfire counter on the Tech 2 it racks up missfire counts on Cyl #1 ONLY in left hand turns and missfires on Cyl #4 ONLY... Trouble codes: P0300 (random missfire)
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2008 GMC Sierra 1500 WT 5.3L Poor Idle Quality, MIL Lamp on VIN: 2GTEK19JX8
check eng. light on p0121 p0506 idle goes up and down sometimes too low eng. hesitates i did replaced throttle body, and clear codes run good for five minutes until i step on the gas rpm goes up but it won't come down until you shut off the eng. or put it on ... Trouble codes: P0121 (tps vol. doesnt agree with maf.), P0506
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1992 Saturn SL 1.9L master cyl VIN: 1YVGE22C1R
car came in with no brakes . replaced calipers front brke hoses and rotors . rear wheel cyls and shoes and a front brake line . ( we have rust proublems here in michigan ) car is fine . coustmer live 50 miles away . after 30 miles or so on the highway brakes s...
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2003 Saturn Ion-3 2.2L head lights VIN: 1G8AL52F63
headlights inop, rplacd bcm. now wont start and lights still dont work
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Fixes & Summaries for GM
Fix/Summary Answers
1993 Chevrolet S10 4.3L Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1GCCT14Z9P
Thank you to all who replied...it ended up being the coil...theres a three part ohms test in alldata,, so i did that and it failed #3 test...again thank you everyone!
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2001 Chevrolet Silverado 1500 5.3L power steering VIN: 1GCEK19T11
Thanks for all the replies, it seems clear that the problem is in the steering gear itself, tried bleeding procedures with no change, customer elected to replace gearbox on his own at a later date. Thanks again to all who replied, have a great day!
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2001 Chevrolet Astro 4.3L Ignition switch VIN: 1GCDM19W11
I took apart the tumbler housing and found the 2 gears had jumped a tooth, no apparent wear and the likely hood of it happening again I ordered a new part. I was able to hold the gears and switch and operate the ign. switch with good success. I hope this hel...
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2002 Chevrolet Impala LS 3.8L No Start VIN: 2G1WH55K92
It took awhile and alot of headaches but its finally fixed. I tried an ignition switch,a PCM and even a passloock sensor as many had suggested. In the end it turned out to be a new BCM that fixed it. I guess the BCM, just for whatever reason, was not sending t...
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2003 Chevrolet Venture LS 3.4L power sliding doors VIN: 1GBDX23F03
hi again guy's thanks to all who replied,  I ended up following the trouble tree for the original code 23 to finally diagnose it. didn't realize that the system won't re-initialize with a fault in it, i was trying to clear the code and re-test. but i finally f...
5
2003 Chevrolet Silverado 2500 6.0L oil press gauge VIN: 1GCHK29U73
Thank You ti everyone who replied,especially the folks who gave me a link to another IATN member with a similar problem. I ended up wrapping the oil press sending unit in aluminum foil. With the hood closed the op gauge would deflect, but not enough to cause a...
4
2004 Chevrolet Impala LS 3.8L No Start, Cuts out, Stall VIN: 2G1WH52K74
Replacing the MAF sensor corrected the start/stall and overfueling condition. The "hiccup" was caused by a problem with the scanner(Solus). Thanks for all the replies.
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2006 Hummer H3 3.5L A/C Blower motor
Thanks to Robert and Adrian,every little bit helps, Heather from Montana is my hero, I checked the ground on the right hand inner fender, all good, pulled the passenger kick panel, the flat connector, terminal #7, once opened, exposed a burned wire terminal, I...
4
2007 Hummer H2 6.0L auxilliary ac
customer finally got some diagrams from the folks at krystal limo, and we were able to quickly diagnose the problem. i know if one of you had a diagram,it would have been much quicker.thanks
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1991 Pontiac Firebird Formula 5.7L Cuts out VIN: 1G2FS2383M
Every person that replied to my request agreed that I should replace all 8 of the injectors. After replacing all the injectors (Genuine OE AC Delco)the engine ran normal with no leftover issues. As I had said in my original post, one of the injectors (#1 actua...
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2001 Pontiac Bonneville SE 3.8L MIL Lamp on VIN: 12WER456YU
hi guys i replaced purge sol. and vent sol. short money. erased lite customer hasnt notified me if lite has come back on.fuel sensor was still reading 1.47 volts, which is atmospheric pressure so i am sure the lite came back on,customer was a relative and most... Trouble codes: P0452, P0440.
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2001 Pontiac Bonneville SE 3.8L Surge VIN: 1G2HX54K71
We retuned the vehicle to the car dealer to decide what he was going to do, he brought it back and said that depending on the road the vehicle wouldn't do the surge, he thought it was in the suspension, struts shocks. He showed me on a test drive and to me it ...
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2003 Pontiac Montana 3.4L Stall VIN: 1GMDX13E63
WELL THANKS TO ALL FOR THE GOOD INPUT THIS FIX WAS A SUCCESS BY REPLACEING THE MASS AIR SENSOR BUT AFTER REPLACEMENT THE VAN STALLED 1 TIME I WENT TO MY (NO-DATA) AND LOOKED FOR A IDLE RELEARN BUT NO LUCK BUT AFTER DRIVING TO AND FROM WORK FOR 3 DAYS WITH @ WI... Trouble codes: P0101 (M.A.F.sensor range/ performance problem).
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