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Prev Professional Automotive Repair Technical Discussions for April 3, 2012
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1989 Cadillac Allante 4.5L Excessive Emissions VIN: 1G6VR3182K
Vehicle came in for state emission test failure on HC and NOX. I found multiple misfires due to shorted injectors. Replaced two injectors that were ohming out at less than 3 ohms. After repair, vehicle ran good and passed pretest. Vehicle returned a week later...
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2002 Cadillac Eldorado ETC 4.6L Lighting VIN: 1G6EC12972
The interior lights on this cadillac won't come on when either door is opened. I can watched the data stream and the BCM recognizes that the doors were opened, but the BCM is not commanding lights on. I can see the lighting command PID and it is not commanding...
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2004 Cadillac Escalade ESV 6.0L stability VIN: 3GYFK66N44
Hello all need a little advice on this problem that i have ran into here. J ust did alot of work on this caddy all went well. I disconneted battery taped sterring colium so it would not move performed all work listed below. I got done connected battery and pul...
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2002 Chevrolet Trailblazer LT 4.2L Abs VIN: 1GNET16S52
Hello this vehicle came in with the abs falsely activating at every stop, at slow speeds. Using the tech 2 data stream I verified that the right front wheel speed sensor would not start reading until about 30 mph and was causing the abs to activate. I retrieve...
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2003 Chevrolet Trailblazer North Face 4.2L MIL Lamp on VIN: 1GNET16S83
Hello, thanks in advance for any ideas or experiences shared. BACKGROUND/HISTORY: This vehicle came into my shop after already having been to the 2 seperate dealerships. While in their care there were a few repairs performed: APP replaced, PCM replaced, and ... Trouble codes: P1271 (App 12 correlation error)
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2005 Chevrolet Malibu 2.2L No Start, Cuts out VIN: 1G1ZS52F15
This Malibu has an intermittent stall, followed by a no crank situation. Last week it had a laundry list of codes, the only one that would re-occur is for the +/- shift buttons on the shifter. If you are interested, I can post them. According to the owner, a... Trouble codes: P0340, P0601
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2006 Chevrolet Trailblazer LT 4.2L Misfire, MIL Lamp on VIN: 1GNDT13SX6
MIL light on, codes p0014 and p0455, reading all of the notes on iatn, most vehicles had driveability issues, this trailblazer runs good, gas mileage is good, only a few random misfires in cylinder 6. Not familiar with this issue. Has anyone else run into this... Trouble codes: P0014 (Camshaft position bank 1 timing over advanced), P0455 (Large leak)
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2004 GMC Sierra 2500 HD SLE 6.6L No Start VIN: 1GTHK29184
hey everyone i need help iam not much of a diesel mechanic. I have this duramax that wont start. Owner replaced his own fuel filter and after a couple hours driving he noticed lack of power and his fuel pressure was dropping down he could not remember to what ... Trouble codes: P1621 (Control Module Long Term Memory Performance)
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2008 GMC Sierra 1500 WT 4.3L Misfire VIN: 1GTEC14X98
Truck came in the P0301 cyl 1 misfire. Removed #1 plug and it had carbon tracking about 1/4" wide and the length of the porcelin. Easy fix. Replaced plugs and wires with factory parts. Also had a coolant leak-water pump and head gaskets replaced. Still have th... Trouble codes: P0301 (cylinder 1 misfire)
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2000 Pontiac Montana 3.4L Misfire, all cylinders VIN: 1GMDX03E2Y
this engine has a missfire during second gear and only trough second gear. all cylinders show missfire on the scanner no other codes. notice that when egr is unpluged engine runs good as long as theres a code for the egr no missfire. i plugged a mew egr on the... Trouble codes: P0300
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2003 Saturn Ion-2 2.2L No Start VIN: 1G8AJ52F33
Hello iatn members this saturn will not start.no spark & no injector pulse.no dtcs stored in pcm & bcm. I am leaning toward defective bcm but i wanted to get some more advises. There is run/crank relay which powers up abs2,ecm,ign fuse etc. When ignition is on...
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2007 Saturn Aura XR 3.6L all lights VIN: 1G8ZV57787
The customer brought the car in and said that it was dead this morning, and they had to jump start it, but afterwards the lights were flickering. So I tested the battery first and it is good, then I tested the alt and it tested good. 14.35v no load, and 14.10 ...
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Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick LeSabre Custom 3.8L Cuts out, Stall VIN: 1G4HP52L2R
Thank you all for your help. Many techs suggested crank sensor problems, pcm problems, and the wiring in between as common failures. Some said that the ignition switch, MAF, and harmonic balancer were common culprits. I tried blocking off the EGR and symp...
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1999 Buick Century Custom 3.1L Lifters VIN: 2G4WS52M5X
Thanks all for all of the replies, we changed the oil and filter several times with sea foam, after driving car awhile engine would start missing again and would lose compression on different cylinders, I finally had the tech. pull the intake back off and remo...
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1996 Chevrolet Blazer 4.3L top end of engine VIN: 1GNDT13W2T
Well, this one is all fixed. I knew it was a bad lifter all along. I guess I needed to hear it from others to confirm. Put in a new set of lifters and all is quiet once again. I still don't see why it happened right after doing the intake gaskets. Just a stran...
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2004 Chevrolet Silverado 2500 HD 6.6L Stall VIN: 1GCHK23194
Well i will say this truck is fixed. For now anyway. We repalced the fuel hoses and clamps at fuel filter housing and put a vacumn on filter housing and it held vacumn, so we didnt replace it. Let the customer have it. Talked to him later and he said he had ra... Trouble codes: P0380.
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1995 GMC Safari SLE 4.3L power window VIN: 1GKDM19W9S
I have given up on this. Can find no more broken wires and continuity test of wires show no problem.
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2002 GMC Envoy SLE 4.2L Hesitation, Stall, on turning full left VIN: 1GKDT13S32
Customer took Vehicle to dealer and said the problem seemed to be fixed with a flash of the computer. Thanks for all the help...Dave
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2003 GMC Sierra 1500 HD SLE 6.0L heating VIN: 1GTGK13U83
HI GUYS AND THANKS TO ALL THAT TOOK THE TIME TO HELP. FIRST I JUST WANT TO POINT OUT, THAT I'M THE SHOP OWNER, NOT THE TECH WORKING ON THE VEHICLE, SO I GET THE INFO FROM THEM. SORRY ABOUT THE LACK OF INFORMATION WHEN I POSTED. AFTER DOING SOME RESEARCH WE FOU...
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