× 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 December 31, 2009
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
2001 Buick Century Custom 3.1L door locks VIN: 1G4HP54K41
we bought this buick to sell. the door ajar light comes on intermittenly when all doors are closed. during this time the odometer can't be seen. if we press the odo/trip button the mileage shows up. i don't have a scanner that can monitor the doors but isuspec...
1995 Chevrolet C3500 6.5L master cylinder VIN: 1GBJC34F4S
As stated, this will be the third clutch master cylinder to be replaced. Can not find any reason for this to be happening.
1998 Chevrolet C3500 Silverado 6.5L fuel gauge VIN: 1GBKC34F8W
Hey folks, I've got one here that is causing me to pull my hair out. This truck has a minor problem where the fuel gauge will basically vibrate really fast. It isn't moving around much just vibrating. I've seen a few of these over the years doing this but no o...
2001 Chevrolet Blazer LS 4.3L low beam headlamps VIN: 1GNDT13W51
hi everyone, i have a s10 blazer with no low beam headlamps, all fuses and relays are good, we figured it was a multifunction switch( like many others) installed a new gm switch. still not lights. we are thinking poss. bcm? lighting module? gm says lighting mo...
2002 Chevrolet Silverado 3500 6.6L shifts into neutral VIN: 1GCJK39152
speedometer would not work causing to shift into neutral shift indicater flashing replaced all speed sencers and shift soloind on side of transmission transmission shifts fine but but every now and then it shifts into neutral driving down the road drop it down...
2002 Chevrolet Blazer Xtreme 4.3L Unknown VIN: 1GNCS18W92
veh reposessed. inspection revealed leaking intake which after replacement veh looses heat while driving. backflushed heater core,same result. veh would start to overheat (260f) while idling. replaced t-stat, still lost heat and ran hot. flushed everything,rep...
2004 Chevrolet Colorado Z85 LS 3.5L rf speed VIN: 1GCOT13684
i have a 2004 colorado 4x4 that has a rf wheel speed sensor hard code. i have replaced the sensor and swapped a known good abs modulle and still receive the code. scan tool shows no speed from that wheel at any time. checked wiring from hub all the way back to...
2002 GMC Sierra 2500 HD 6.6L Hesitation, Misfire, MIL Lamp on VIN: 1GTHK23192
This has been an ongoing problem for the last 5 years. Every winter this duramax will go into limp mode and the ses lamp comes on. Won't go past 20 mph. And sometimes when that happens the fuel gauge will read empty and the check guage lamp is on. It happened ... Trouble codes: P0101, P0201, P0204, P0206, P0207, P1261
2008 GMC Yukon Hybrid 6.0L No Start VIN: 1GKFK13518
Vehicle arrived here from body shop,was involved in a front end collision.I suspect the crash detection sensor has locked out the hybrid system My question is do I need to replace the impact sensor and can I reset the hybrid control module with the snap on sol...

Fixes & Summaries for GM
Fix/Summary Answers
1981 Cadillac DeVille 4.1L Distributor VIN: 1G6A04747B
Thanks for all the good info everyone. I ended up lining it up the ol' fashioned way. Put my compression gauge on and turning her over by hand until she was on 1. I removed the cap and it was pointed where I had first thought #1 should be. But better to be ...
1989 Chevrolet C1500 Silverado 5.0L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 1GCDC14H8K
Thanks for all the replies. After making some phone calls this morning I found someone with a pressure guage & the fittings to hook it up. I checkes pressure in the shop & had 12psi. I went on a test drive & the pressure quickly droped to 5psi then the pump ju...
1996 Chevrolet S10 2.2L no low gear VIN: 1GCCS1449T
As stated in the update, the two solenoids read real high resistance. My respondents agreed that they were too high: read around 750 ohms, should have been 20 or so. I felt the PCM was doing its job, because we could flash the battery connection, and start the...
1999 Chevrolet Lumina 3.1L Misfire, MIL Lamp on VIN: 2G1WL52M8X
Thanks For all The Help. We Tried Ign Module, All 3 Coils, Checked Egr Valve And Made Sure Passage Was Open, Flashed Another PCM, Tested Compression, Replaced Spark Plugs, Nothing Helped. When We Flashed PCM We Could Not Get The Car To Do A Crank Relearn. Than... Trouble codes: P0300.
1999 Chevrolet Silverado 1500 LT 5.3L Four Wheel Drive VIN: 2GCEK19TXX
We put the vehicle in park with the engine running and checked to see if the drive shaft would move - it did with resistance. With someone in the vehicle we checked the drive shaft resistance going from 2 wheel drive to 4 wheel drive. Remove the detent plug ...
2002 Chevrolet Trailblazer EXT LT 4.2L Heated Seats VIN: 1GNDT13S32
It appears that the drivers door module will have to be programmed. We have programming capabilities here but GM requires a minimum 3 month subscription to TIS at the cost of 300.00, not cost effective unless we do 5-6 GM programmings over the next three month...
2008 Chevrolet Colorado LT 3.7L Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on VIN: 1GBDS14E38
Well this one seems to be a real problem I have tried everything. Some of you have mentioned checking the wiring and making sure I had used the original wiring harness which i had. The truck was at the dealer and they said it needs a 2008 model motor. I tried ... Trouble codes: P0014 (Camshaft position timing over advanced or system performance), P0366 (Camshaft position sensor B circuit rangeperformance), P0300 (Randommultiple cylinder misfire).
2003 Saturn L300 3.0L timing belt VIN: 1G8JL54R34
Thanks everyone. Guess it's pretty simple, wish the expensive software would give the proper setup information. Gates has a timing belt kit with proper instructions and pictorials (P/N TCK 285B). Happy New Year.
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next