× 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 March 16, 2011
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
2000 Checker montecarlo 3.8L ac VIN: 2G1WX12K6Y
i ben working on this car for half a day non stop; is a ac problem the conpresor dont com on, i chek all fuses,relay,we replace the control assembly,still the same tink,replac the relay,all the wires are good,i not geting power to the ac relay, if any one seen...
1998 Chevrolet K1500 Silverado 5.7L Brake lights VIN: 1GCEK19R7W
Brake light only works on a slight pressure as you continue to push on the brake pedal light goes out at bottom of stroke.This happens wether engine runnin or not. turn signals and all other light work fine. Do you think turn signal switch could be malfunctioi...
1999 Chevrolet Express 2500 5.7L won't start VIN: 1GTGG29R1X
Hello all and thanks in advance, My neighbor has this van with a very strange starting problem in that when it rains hard, it often won't start. When it does this you will see erratic operation of the instrument cluster while cranking such as the speedo needle...
2001 Chevrolet Venture LS 3.4L Window VIN: 1GNDX03E11
The front passenger door window will go down slowly and will not go up. There is voltage thru the switch, (passenger door), to the Dark Blue and Dark Brown wire at the switch and at the connector at the motor. There is continuity from the Black wire at the swi...
2002 Chevrolet Express 3500 5.7L MIL Lamp on VIN: 1GBH31R721
Hello asking for some help vehical has code for crank shaft relearn but cant do it due to park indacator wont light up along with nutral,3,1 checked wiring and found conectors mangled up from customer getting unpluged. Replaced conectors with ac parts still ...
2003 Chevrolet Silverado 1500 HD LS 6.0L Hesitation, Surge VIN: 1GCGK13U13
Hi to all .. I have a puzzler here. Replaced throttle body and pigtail connector couple weeks ago due to surge under light to moderate accel and had 2 thr pos. codes. Codes have not returned, however after a week to 10 days, surge is back. Feels like gas pedal...
2004 Chevrolet Impala 3.8L ABS Module? VIN: 2G1WF55K84
Customer complaint (fairly new owner) states that he hears a ratcheting sound from what he believes to be abs self-test everytime he comes to a stop (can be heard outside the car by other drivers). Happens about 12 mph. Only happens when vehicle is warmed up, ...
2005 Chevrolet Equinox LT 3.4L Mechanical VIN: 2CNDL63FX5
Customer leaves a message on 3/07 to call him about a brake problem. He tells me that over the weekend the brake pedal sank to the floor while sitting at a traffic light. He stated this happened only that one time as he continued to drive the car. I explained ...
2005 Chevrolet Impala 3.4L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 2G1WF52E45
This vehicle came in running very rough and had a noticible vacuum leak (whistle) a visual inspection noticed a exhaust blackening under the intake plenum near the throttle that melted part of injector wiring pvc vac tube partialy melted a injector, coolant te... Trouble codes: P0101 (p0300-), P0300 (p0620-), P0620 (p1106-), P1106 (p1626-), P1626
2007 Chevrolet Uplander LS 3.9L Starter VIN: 1GNDU23197
The 2007 Uplander has 82,635 miles. We are experiencing a short clicking noise just before the starter engages. The starter is not at fault as it has been tested and is in good working order. The battery is in good working order as we have load tested it sever...
1997 GMC K1500 Suburban 5.7L MIL Lamp on, Solenoids,tcc affect VIN: 1GKEK13R1V
This vehicle shows speedo pegged at 100 mph odometer inoperative and no tach signal, upon shifting into drive vehicle struggles to move if put in low vehicle moves but slowly then operates as if kicking in, believe need to pull dash and speedo to check resisto... Trouble codes: P0740 (Tcc solenoid elec malfunction), P0785 (--2 solenoid elec malfunction), P1860 (Tcc pwn solenoid elec malfunction), P0441 (Evap emissions), P0713 (Tft sensor check), P0758 (2-3 shift p0713 - 1-2 shift)
2000 GMC Jimmy SLS 4.3L Mechanical VIN: 1GKCT18W3Y
Hi there ,we have this one vehicle in the shop thats giving us a problem.Customer came for a brake job we replaced front pads and rotor,couple days later customer is back saying front wheels are sticking and can smell burning smell from the brakes, we pulled i...
2007 GMC Sierra 1500 SLE 5.3L Mechanical VIN: 1GTEK19047
hey guys! another hair puller! truck came in for 100k service. brake flush on the list. manually flushing like we are bleeding brakes. rear brakes went fine. started on rf and after fourth time down pedal went clear down to floor. fluid level at minimum but no...
2006 Pontiac Torrent 3.4L no start VIN: 2CKDL63F46
This vehicle starts fine. After it warms up, and the vehicle is shut off, it won't start. The fuel pump relay has no power fron the computer when this happens. If you let it cool down, the power returns to the relay and it starts.
2001 Saturn SL 1.9L Unknown VIN: 1G8ZH52851
I'm not to familiar with these trannys. On a road test with Snap on scanner the trans would shift to 3rd and go into 4th after a delay and then snap. It would almost feel like a shift kit installed. When I started out the trans temp was 63 degrees and TCC slip...
2006 Saturn Vue 2.2L automatic lights VIN: 5GZCZ33D26
ok, hello to all first and thank you in advance for your time. i think i may have screwed something up but i hope that there is someone out there to tell me differently. i replaced a bcm recently on this vehicle for stalling problems and codes (tsb on this) an...

Fixes & Summaries for GM
Fix/Summary Answers
2005 Buick LeSabre Custom 3.8L Poor Idle Quality, Stall VIN: 1G4HP52K55
Hello everyone, I wanted to let you know what I found with the '05 buick LeSabre. After rechecking all power and pcm signals everything appeared to be normal. I then physically removed the aftermarket IAC motor and inspected the bore and pintle for damage, non...
1997 Cadillac Eldorado 4.6L Misfire, MIL Lamp on VIN: 1G6EL12Y4V
Finally caught it acting up when it was ice cold. turned out to be intake gasket. Thanks for all your help. Trouble codes: P0300.
2005 Chevrolet Silverado 3500 6.6L Starting VIN: 1GBJC34235
Thanks for the replies, I found wiring burnt together in the harness near that alternator zip tie that everyone was referring to. Thanks for all the help and replies. Vehicle is gone and customer is happy.
2007 Chevrolet Impala LT 3.9L Poor Idle Quality, Misfire VIN: 2G1WC58R17
I have my doubts that others will experience this problem, but, it still needs to be discussed. so, this is what I did: after a complete maint tuneup ie: ac delco plugs and wires, missfire was then just on #4.(it was originally on multiply cyl's) switched plug... Trouble codes: P0300.
1996 GMC K2500 Sierra SL 5.7L Tcc VIN: 1GTGK29R9T
Owner yet to bring truck back. I do know that it only does when warmed up, at 1800-2100 rpm, the ecm is comanding the tcc on and off and will continue to do so as long as you are in that rpm range, it does it in 3rd and 4th gear. Been over the brake switch, vs...
2007 GMC Canyon SL 2.9L timing VIN: 1GTDT19937
Thanks again for your replies. I had our service department pull all history on this vehicle.seems this vehicle has a history of setting a p0300. I was able to watch missfires climb on cyl #1 using tech 2. I removed #1 cyl plug to test cylinder leak down at 5...
1998 Pontiac Bonneville SE 3.8L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire VIN: 1G2H52K5WH
Finally fixed the problem! Thanks to Gene, i rescoped everything and found there is just a slight glitch in the crank signal. removed the balancer and inspected the new sensor carefully. found there is a scratch in it where the sensor reads from the balancer i...
2005 Saturn Ion-1 2.2L MIL Lamp on VIN: 1G8AZ54F75
Ok five out of six of you agreed. I replaced the ecm and that fixed it. I had scoped the powers and ground at the ecm and they never disappeared when the engine died. The thing that made up mind was the no crank after dying. Even if I had lost fuel pressure,sp... Trouble codes: P0601.
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next