× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 27, 2012
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for GM
Help Request Answers
2006 Buick Rendezvous CXL 3.5L instrument cluster, fuel gauge, tach, coolant temp VIN: 3G5DA03L16
Customer brought this one in with a no start complaint, found starting fine, but found security light on after start up, then on test drive Trac off light came on, then fuel gauge, tach, and coolant temp gauges dropped off! a couple of seconds later gauges sta...
2007 Buick Lucerne CXL 3.8L MIL Lamp on VIN: 153GS83JL7
this car is kicking my butt it came in with a code po411 incorrect air pump flow i checked the air pump to make sure there was no water in it then i could operate it with the scanner pump worked very well i checked all the hoses for cracks did not see any next... Trouble codes: P0411
2002 Cadillac DeVille DHS 4.6L a/c VIN: 1GEEH90Y72
Hey all this car came in about a week ago blowing warm air on drivers side and cold on pass. Side. I read through all the posts on here to try to help fix this with no luck as of yet. First off i recharged the system as many posts said this is a problem on the...
2007 Cadillac Escalade ESV 6.2L Electronic VIN: 1GYFK66847
Hi all GM techs( I have this Cadillac Escalade (expensive Suburban) after driving it for a while, evaporator freeze up( I have check The A/c system, all gauge reading good, all inside and outside ambient and inside sensor changing with temperature. I have a Co...
1967 Chevrolet C10 Pickup 5.3L 3-2shift
Customer has installed 200r4 transmission with shift kit and 2500 stall converter. He brought to me when he couldn't get it to shift as he wished. First I adjusted the TV cable on carb by adjusting pivot points and was able to get upshifts nice and crisp and w...
2000 Chevrolet Suburban 2500 LT 6.0L fuel rail, pressure regulator VIN: 3GNGK26U1Y
Vehicle came in with a noise in the fuel rail in the area of the regulator, pressure was a little off so the regulator was replaced. Noise gone, customer took home, called next morning, noise back! At this point someone suggested "fuel pump" said there's an ac...
2003 Chevrolet Impala LS 3.8L high idle VIN: 2G1WH52K43
car came in with high idle. has had intake gaskets,plenimue gaskets, mass,iac,and tps installed. noticed had 2 volts on tps, unpluged and still had 2 volts. removed iac and closed of ports and has min idle speed less then 400 rpm.
2003 Chevrolet Express 3500 6.0L MIL Lamp on VIN: 1GBHG31U93
This high mileage van has a P0300 and shows consistent misfires on cylinders 5 and 8 when accelerating down the road or in neutral, though no misfire is felt or actually occuring. We cannot complete a crankshaft variation relearn procedure, which is our main c... Trouble codes: P0300
2003 Chevrolet Express 2500 6.0L ipc,ebcm,pcm VIN: 1GCGG25U63
ipc,pcm,go down when ebcm is connected to data bus, system is normal when removed bypassed harness still same issue abs warning persists on ipc all the time looking for a pointer i have to be missing something!!! i have checked the harness for chaffing at the ...
2004 Chevrolet C6500 Kodiak C6C042 8.1L Hesitation, Surge, Cuts out, MIL Lamp on VIN: 5B4MP67G24
This thing going up hill act like it isn't getting fuel. He will stop for few minutes & continue. Looking at the scanner freeze frame, shows that it is open loop when this occurs. Any thoughts would be welcome. Thanx Trouble codes: P0131, P0151

Fixes & Summaries for GM
Fix/Summary Answers
2008 Cadillac CTS 3.6L radio VIN: 1G6DM57798
Sorry for the late reply,Never found the problem the only thing I did was removed all the fuses one by one and reinstalled and everything worked. Still to this day the customer say everything is working as normal.
1995 Chevrolet K3500 Cheyenne 7.4L Shifting problem VIN: 1GCHK39N2S
I replaced the aftermarket VSS I had previously installed with one from the dealer. Now the VSS output has no variation. I did check the tone ring for being loose and the alternator output with a lab scope, so the only thing left that it could be was a crapp...
1996 Chevrolet Blazer 4.3L Pedal VIN: 1GNDT13W1T
Well, i feel this one is fixed. First off My solus ultra, a modis, and an old mt2500 brick all state that there is no bleed function test for a 1996 blazer but all list a test for a 1997, but it will not do anything on my setup. I wanted to try a genisys from ...
1999 Chevrolet Blazer 4.3L fuel pump VIN: 1GNCT18W6X
Good evening all I think this vehicle is fixed.I had already checked the fuel pump with the amp probe and also tried switching the relay with a another one,that is why I posted the problem the way I did,just giving the symptoms and if anyone had any ideas.Well...
2003 Chevrolet Silverado 1500 4.3L dies
Okay went on side of road and fixed vehicle. The black and white wire going to the coil is the modules input. It was open at times. I took ohmeter and and check it while wiggle testing wire. Open circuit at times and at times show good. Replaced connector goin...
2005 Chevrolet Silverado 1500 5.3L Accessories VIN: 1GCEK19B85
Put in new BCM and it fixed the problem. Thanks to all .
2006 Chevrolet Tahoe LS 4.8L all VIN: 1GNEC13V26
thanks to all who replied. i measured my spindles and found them to be the same on either side and measured a pair on a known good truck with same measurements. kevin from ontario nailed it with the center link being installed improperly. tech previous to me h...
2004 GMC Sierra 1500 SLE 4.8L pcm reset VIN: 2GTEC19VX4
The PCM was bad. Once it was replaced the vehicle retained memory and all OBD II monitors ran and were retained. Vehicle passed state required emissions.
2004 Hummer H2 6.0L no cool air VIN: 5GRGN23U14
Thank you for all of your help. This vehicle required just a couple ounces over Utility vehicle specs to bring charge to spec. The customer installed an orifice tube and did not have the equipment to recharge the system.
1999 Oldsmobile Aurora 4.0L headlites/taillite/stoplite VIN: 1G3GR62CXX
well here goes..this car we bought cause its clean n the only problem it has is not headlites but park lamps stay on w/everythin n off position.switched modules n now my headlites r stayin on..i`m goin backwards so i`m closin request w/still same problem if no...
2000 Pontiac Montana 3.4L Misfire VIN: 1GMDX03E7Y
Well, I kinda feel like a moron, but not completely. I always tell my guys not to overthink things and stick to the basics to begin with. Ended up doing a full compression test and found ZIPPO compression on cylinder #5. (now, I know that #5 is the mate to ... Trouble codes: P0300 (Cylinder misfire).
2000 Saturn SL2 1.9L compressor VIN: 1G8ZK5274Y
this one is finaly gone!!! thank you to every one. all though that it caind of turned in to a blog for some people. others were very help full about my problem. it turned out to be a bad reman conpressor. afther re checking and replacing the expansin valve fou...
2000 Saturn LS2 3.0L Hesitation VIN: 1G8JW52R9Y
Sorry this toke so long. We finally put a delco mass air flow and the hesitation went away!! After about 30 seconds of great running it quite but after a qiuck change of a crank sensor everything is great.
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next