× 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 August 7, 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
1995 Chevrolet P30 5.7L Hesitation, Cuts out, Stall VIN: 1GBHP32K0S
I have a Mister Softee Truck that will stall on acceleration without warning. It is an old truck and it seems like everything I test is either marginal or bad. All of the above items were tested and replaced. Now when the truck is running, it runs better than ...
2001 Chevrolet Silverado 3500 6.6L Hesitation, Surge, MIL Lamp on VIN: 1GCJK33191
Got a Duramax here that will, under a load, go into limp mode and set code Po093(fuel system large leak). Upon inspection, noticed that the oil in crankcase has quite a bit of fuel contamination. Also has about a 40 rpm "lope" at idle. Other than the limp mode... Trouble codes: P0093
2005 Chevrolet Silverado 1500 4.8L MIL Lamp on VIN: 1GCEC19V45
we have replaced the #1 knock sensor but the 327 code keeps coming back. we checked wiring from ecm and seems to be ok. anyone have any ideas on the best way to diagnose this? have been down trouble trees to no avail. thanks larry. Trouble codes: P0327
2006 Chevrolet Equinox LT 3.4L Blower Motor VIN: 2CNDL63F66
Vehicle came in for blower motor not blowing. Checked it out and found not blowing in any speed. Followed flow chart and it came down to replace the blower motor resistor, which I did. Same thing. Still inop. It seems that I only have 9 volts at the blower mot...
2006 Chevrolet Colorado LT 2.8L MIL Lamp on VIN: 1GCCS19866
low block cell, balanced o2 readings, very high long term fuel trim of 24%, freeze frame data 23 failures in the last 93 miles. all at idle and to oper temp. Trouble codes: P0171
1993 Pontiac Bonneville SE 3.8L ebcm VIN: 1G2HX53L4P
vehicle came in with abs light on, went to pull codes but my tech 2 will just lock up with a weird message. it doesn't say no communication it just locks up. i have communication with powertrain only. tried my modis also and same thing happens just locks up. t...
2004 Saturn L300-2 3.0L rear tires VIN: 1G8JL54R24
Hello all and thanks in advance for any help, we have this Saturn L300 that came in for a noise in the rear at highway speeds, inspection found the rear tires to be worn heavily on the inside and very choppy, and the rear struts to be leaking. We replaced the ...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Cadillac DeVille 4.9L water leak VIN: 1G6CD5384M
Thanks for all the help,we gambled to just removing backing plate on water pump as requested by customer who is on a fixed income.We let them no if if doesnt work it will cost more later.Wasnt to bad of a job just be careful not to mess up gasket on timing cov...
1993 Chevrolet C1500 Cheyenne 5.0L Poor Idle Quality, Hesitation, Stall VIN: 1GCDC14H8P
bad fuel pump.pressure was good but had almost no volume.dist. looked great(a lot of people said to check it).replaced pump and all is good now.thanks to all who sent help Trouble codes: 33 (map sensor circuit too high), 44 (lean exhaust).
2003 Chevrolet Suburban 1500 LT 5.3L no start VIN: 1GNFK16Z83
The fuel pump shorted out blowing the fuse to the computer. With the shorted fuse there was no start signal from the computer. truck runs fine with new fuel pump, filter and fuse.
2003 Chevrolet Express 3500 6.0L Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GCHG35U23
Thanks to chris for sending me some good diagram info. I ended up printed up a wiring diagram from mitchell and traced to where the problem was. I measured the voltage for the working wires and they turned out to be somewhere in the lines of 12.4 volts. T... Trouble codes: P0300, P1020.
2003 Chevrolet S10 4.3L Hesitation, MIL Lamp on VIN: 1GCCT19X23
iatn apparently isn't showing me an update option but anyway. My brother in law is kinda slow to return you know the type young and so busy but anyway. I am still toying with the truck I noticed something interesting. He had a friend install 2 amplifiers in ...
2004 Chevrolet Silverado 3500 8.1L transfer case VIN: 1GCJK34G74
Most of the replies were right on track. As originally thought, the encoder motor was the fix. Thanks a lot to all who replied and to IATN!
2004 Chevrolet Cavalier LS 2.2L Mechanical VIN: 1G1JF52F74
Thanks to all who replied. Most everyone said bent valves and you were right. All is good now thank you everyone.
2005 Chevrolet Silverado 1500 LS 5.3L service lamp VIN: 2GCEK13T15
Thanks for all the lightning fast replies!! Most of you were right on the money with the encoder sensor, and it was a fairly easy repair as many of you mentioned. Thanks again for the help, have a great weekend! Mark.
2006 Chevrolet Cobalt LS 2.2L MIL Lamp on VIN: F777103254
thanks to every body ,put coolant sensor in to start with,watched coolant readings while car running ,the temp would drop real fast then go back up .replaced thermostat temp stayed the same its fixed anouther lucky customer had there car fixed by iatn.thanks Trouble codes: P0128.
2001 GMC Yukon SLE 5.3L MIL Lamp on VIN: 1GKEK13T41
Thank you Thank you. After smoking this thing everyway i could think of both Gordon and Mark hit it on the head. I dropped the tank and smoked it for a half and hour. Filling the tank with as much smoke I could. I ended up getting a very small wisp of smoke fr... Trouble codes: P0442.
2002 GMC Sierra 2500 HD SL 6.6L Poor Idle Quality, MIL Lamp on, lack of power climb VIN: 1GTHK23182
Sorry about the late close of this help request. A pile of unrelated problems made me forget about it until the customer finally called yesterday. The truck was just out of the injector warranty period of 7 years and the owner was going to see if GM would ho... Trouble codes: P0089 (Fuel pressure regulator performance), P0101 (MAF sensor performance), P0404 (EGR open position performance), P0540 (Intake air heater feedback circuit), P1093 (Fuel rail pressure low during power enrichment).
2001 Pontiac Montana 3.4L ac VIN: 1GMDX03E21
What fixed this car was the blend door actuator. The reason my ac wasn't so cold was blend door wasn't moving to full cold. I would watch actuator and blend door when operating from full hot to full cold door would stop before full cold, a gentle push on doo...
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next