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Prev Professional Automotive Repair Technical Discussions for August 5, 2014
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Open Help Requests for GM
Help Request Answers
1999 Buick Park Avenue 3.8L abs VIN: 1G4CW52K2X
when i hit a bump on the right rear wheel the abs traction light comes on and sets abs code c1228 excessive wheel acceleration. I checked continuity to the wheel speed sensor and cannot find a break in wire. replaced the wheel bearing assembly few days later s...
1999 Buick Park Avenue 3.8L Turn Signal/Hazard VIN: 1G4CW52K8X
This vehicle came into my shop with some strange turn signal function. The customer told me that her brother had removed the bulbs from the left side because the LR bulb had stayed on causing her battery to go dead. I replaced all the bulbs with 3057's (most h...
2003 Buick LeSabre Custom 3.8L Codes -no lamp VIN: 1G4HP52K73
2000 Chevrolet Express 1500 5.7L Hesitation, MIL Lamp on VIN: 1GBFG15R8Y
When first started cold...will pop and sputter. Took on road test with fuel pressure gauge hooked up at full throttle will pop and back fire thru intake...fuel pressure will go to 61 psi and stay there until throttle released, then it will jump down to 52psi. ... Trouble codes: P0171 (Lean exhaust bank1), P0174 (Lean exhaust bank 2)
2003 Chevrolet Impala 3.4L No Start VIN: 2G1WF52EX3
Hi all, Got this Impala towed in this morning as a no start. No crank until I jump the starter relay, then no fuel after a second. Scanned for codes and the PCM won’t communicate with the scanner. All other modules communicate and most have codes for missing ... Trouble codes: U1000, U1016, U1255
2007 Chevrolet Silverado 1500 WT 5.3L Electronic VIN: 2GCEK133X7
truck came in with no code in engine system, had p071D code in transmissioin system. was not current code, was history code' 'trans mode switch B circuit' I could not find this code in Mitchell. ifound a p071A code, which had to do with the Tow switch. custome...
2007 Chevrolet Equinox LS 3.4L Brakes VIN: 2CNDL13F67
Vehicle will drive 60 miles with no problem and even more but if in stop and go traffic after 20 min brakes lock up customer will pull off road turn off key wait few min and restart and brakes not lock up anymore also track light and stabil light on
2003 GMC Sierra 2500 HD SLE 6.6L Excessive Emissions, No Start VIN: 1GTHK29153
Hi, folks. This diesel has a long crank, and intermittent no start hot. It also shows a lot of black smoke on hard accel, and has a smoke "haze" even at idle speed. The inside of the tailpipe is heavily sooted.It has a slight diesel knock, too. No codes. Tech...
2007 GMC Sierra 1500 Classic SL 4.8L Misfire, MIL Lamp on VIN: 3GTEK14V67
Hello All this one has been awful. The vehicle came in on the hook customer said it was running a little hot , oil light came on and he didn't think there was an issue. He kept driving it, check engine light started flashing a few minutes later of driving the ... Trouble codes: P0300
1998 Oldsmobile Aurora 4.0L ABS Module VIN: 1G3GR62C2W
I have this gem of a car just kidding its a headache...I have checked and back probed powers and grounds and communication lines to abs module I have no communication to this or the air bag module. I unplugged the air bag module still no com. with the ab...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Chevrolet Astro 4.3L Front wheel bearings VIN: 1GNEL19W5V
Thank you all for replying, it was very well appreciated. The customer has decided to just come back at a later time to have the front differential rebuilt. He uses his van for work and don't want to take a chance. Thank you once again all and have a great day...
2000 Chevrolet Tracker 2.0L Stall
I think this one is fix. Crank signal on the lab scope look normal and also it the cam sensor. Customer haven't come back. We put a OEM CMP senor and it fix it. THANK AGAIN. HOPEFULLY this will help someone in he future. Trouble codes: N0NE.
2001 Chevrolet Silverado 1500 5.3L dlc VIN: 1GCEC19T31
Thanks to all for your thoughts and inputs to this issue, turned out to be the green wire at the dlc, when I checked it for continuity it appeared to be fine, the problem was when you plugged in the scanner that pin would push out as abd not make good contact...
2003 Chevrolet Avalanche 1500 5.3L PW , PDL, Power mirrors VIN: 3GNEC13T53
Thanks for the replies. I replaced the DMM and all is well. My Avalanche is a bare bones model. The only option it has is no body cladding. I am guessing because of this I did not have to have it programmed to work. I now can also scan it with my Genisys. Ther...
2005 Chevrolet Silverado 2500 HD 6.6L Stall VIN: 1GCHK23205
hey I am posting this for a friend of mine his truck now he tells me when its stalls when hot after a hundred mile drive he pumps the pump on the fuel filter and always gets air out of it sometimes it restarts and sometimes it does till it cools off so he is g...
2004 GMC Envoy SLT 4.2L Hesitation VIN: 1GKET12S84
Okay members we fixed this one with all your help. I was told to chase that po641 and 651 code for loss of reference and that's what I did but did not find problem. Jeremy from Michigan advised me to check wiring going into pcm so I unplugged each connector ... Trouble codes: P0641, P2138 (Po122-), P0122, P2135 (Po651-), P0651.
2007 GMC Yukon XL 1500 Denali 6.2L liquid line VIN: 1GKFK66857
man o man,,, It is fixed. turns out this vehicle was causing a harmonic vibration when ac was on only at 2500 and 4000 rpm. when replacing right side motor mount we noticed that the bracket that the compressor mounts to was missing the rear most bolt,,, n...
2008 GMC Acadia SLE 3.6L Ac Check Valve VIN: 1GKER13768
again tks to all that replyed. we have fixed the acadia. checked all lines blew out and flushed front and reat evaparatore and all the lines . replaced the ac compressor. customer bought a used one :( but it works. thanks for all the help again
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