× 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 8, 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
2003 Buick Rendezvous CX 3.4L Hesitation, Cuts out VIN: 3G5DA03E73
I have an interesting problem that is puzzling me. When you accelerate with more than half throttle and over 3000 RPM the car falls flat and doesn't pick up much speed.It feels like multiple misfires. Put your foot to the floor and bogs down even more. Sounds ...
2006 Cadillac CTS 3.6L Abs VIN: 1G6DP57786
Hi this car came in with brakelights on, trouble codes CO281 DRP performance, CO550 ECU performance and brake fluid level code which is full. I have tested powers and grounds loaded circuits all good. Module is expensive does anybody know of a source to repair...
1989 Chevrolet C1500 Cheyenne 5.7L all drivetra VIN: 2GCEC19K2K
thanks in advance for all assistance..we are an auto electric repair shop and we have one brought to us that is puzzling us.. when you drive this truck it intermittantly gets a hard shutter causing truck and steering coloumn to shutter real bad.. it almost fee...
1997 Chevrolet C1500 Cheyenne 5.7L MIL Lamp on VIN: 1GCEC19R7V
I'm hoping someone can shed some light on the problem I am having with this truck. I believe the problem is fuel pressure related. First off,I have checked thoroughly for vacuum leaks and found none. The MAF has been replaced with a known good part with no imp... Trouble codes: P0171 (p0174-), P0174
2001 Chevrolet Silverado 2500 HD 6.0L Surge
Hi everyone. Iam struggling with this trucks idle. Iam getting a surge and low idle sometimes even a stall when throttle plate closes. I have cleaned throtlle plate, also replaced iac motor thinking motor was a little slow, no change after either repair. The b...
2002 Chevrolet Silverado 1500 5.3L 4 Lo VIN: 2GCEK19T22
This vihicle came to me with 4lo shift problem. Checked shift actuator and works properly. Did a volt test and checks good. Nuetral switch checked good. However when putting into nuetral the indicator lights up the park light. The 4lo light blinks and will not...
2003 Chevrolet Silverado 1500 4.8L Mechanical VIN: 1GCEK19V13
Hello all This is my own truck,have changed oil every 3 thousands miles using castrol 5w-30.Since the last two oil changes after 1500 miles it is down a quart.I replaced the pcv valve and changed the oil again and now it is at 1500 miles and a quart low.There ...
2004 Chevrolet Aveo 1.6L no heat VIN: KL1TD52624
we got this aveo that has 170 degree temp outta center vents but only 80 degrees outta drivers vent. same goes for if the mode door is on defrost, hot on pass side and cool on drivers. thanks in advanced for any helpful hints guys.
2005 Chevrolet Impala LS 3.8L No Start VIN: 2G1WH52K55
cust complained of int. but frequent cranks but no start cond. will start after letting it sit or trying several different times. cust says vehicle has sputtered at stop lights 1or2 times but never stalled. customer doesnt think security light was on (I forgot... Trouble codes: P0340, P0341, P0385, P0128, P1811
2006 Chevrolet Suburban 1500 Z71 5.3L Front Blower VIN: 1GNFK16Z76
Blower intermittently doesn't work. Used volt meter and scope to verify HAVC control working properly. Found that red wire to blower control module intermittently had low voltage and chased that to connector in passenger side dash panel and I wired around it (...
2007 Chevrolet Cobalt SS 2.4L Friction Disc VIN: 1G1AM55B37
We have this 2007 Chevrolet Cobalt that has had the clutch friction disc replaced 3 times. The current one has no friction material left. The last time the friction disc was replaced along with the flywheel, pressure plate, and slave/throw out bearing (This tr...
2008 Chevrolet Silverado 2500 HD LTZ 6.6L Poor Fuel Economy
Need some help on this one, duramax LLM very high oil consumption, 1 gallon per [...], 10-12mpg. Oil seems to be getting sucked through pcv valves, into turbo inlett, through intercooler and back around, all connections and egr very oily. Turbo seems to che...
1997 GMC C3500 Sierra SL 6.5L MIL Lamp on VIN: 1GTHC33F7V
Hey guys I'm not a big diesel guy and I'm a little lost here, I am trying to help a customer/friend and he just purchased this from a used car lot. I tested for the 5 volt reference at the optical/fuel temperature sensor and that's good, at that point I starte... Trouble codes: 183 (fuel temp. sensor circut high), 231 (fuel/lift feedback circut low), 251 (inj pump a rotor/ cam problem), 370 (timing reference a high res problem), 238 (boost sensor 1 circut open/high)
2006 GMC Envoy Denali 5.3L engine VIN: 1GKET63M86
truck has low oil pressure run for 5 minutes oil guage goes to o pressure put mechanical guage on truck confirms low pressure put guage at oil pan test port pressure 50 psi ran both guages on truck pan guage will show 50psi while upper guage at sending unit is...
2003 Pontiac Montana 3.4L Starter Circuit VIN: 1GMDX03E33
Everything went good with the install. Vehicle starts, runs and drives just fine. The problem is that it randomly begins cranking on its own without the key anywhere near it. Oddly enough, the harness for the chevy starter relay is 4-pin. The starter Relay for...
1998 Saturn SL2 1.9L Engine VIN: 1G8ZK5275W
Can any one tell me how to reset oil life/ service light on this, it's been a long time since i worked on a saturn. I don't see a reset button in the under hood fuse box like most saturns

Fixes & Summaries for GM
Fix/Summary Answers
1993 Buick Century Special 3.3L Excessive Emissions VIN: 1G4AG55N3P
Thanx guys it's finally done.pulled injectors , replaced 1 and rebuilt the rest.car squeaked by.Thanx again for all the replies yall a great bunch of folks, hope I can help sometime.
1994 Chevrolet S10 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GCCS14W2R
Thanks everyone for another slam dunk by my team here at the shop. We read everyone's posts, and after verifying that all of the reference signals were there (as well as scanning with Modis and verifying signal at idle and also at WOT). After verifying all of... Trouble codes: 22 (TPS Low voltage), 32 (EGR system problem).
1995 Chevrolet Tahoe 5.7L Hesitation, Surge, Cuts out, Stall, Misfire VIN: 3GNEK18K2S
Thank you to all for your replies to my problem.Removed distributor and found gear worn also cap and rotor worn so replace gear, cap ,rotor, plugs and wires.Runs much better but #8 plug oil fouls so put oil fouler in and that helped as well.This truck is throt...
1997 Chevrolet Tahoe 5.7L trans 2-3 shift hesitation VIN: 3GNEK18R5V
Basically,it boils down to the fact that the trans was hurt internally. I went thru the shift solenoids,ect and all of them checked out. I changed out the trans and all is good. I really appreciate everyone's advice and suggestions. If anyone reads this thread...
2000 Chevrolet S10 2.2L Misfire VIN: 1GCCS1451Y
Thank you for all the help... I was a failed PCM. Replaced it and it ran like a charm. If any one has any ideas what I could have done to cause this failure please post a response. Not my first GM engine replacement by a long shot and this troubles me. ... Trouble codes: P0300.
2000 Chevrolet Astro 4.3L Surge, Misfire VIN: 1GNEL19W2Y
Thanks so much for all you guys' input. It was the dist cap. I should have went with my gut feeling on this cause I have been caught before with these. What threw me off was no skip at idle so I started over analyzing things. Thanks for getting me back to basi...
2000 Chevrolet Malibu 3.1L Cooling Systems VIN: 1G1ND52J0Y
I did pull drain plug and nothing but oil came out, so I guess they overfilled it on last oil change. I forgot to add that the vehicle does run rough, but pulling plug wires makes no more or less difference on any one cylinder. Thank you all for the replies, I...
2002 Chevrolet Silverado 2500 HD 6.6L MIL Lamp on VIN: 1GCHC231X2
the customer took the vehicle saying the power was the same as before and he didnt want to spend money on diag we were leaning toward high pressure pump thanks for all your help Trouble codes: P1093, P1094.
2005 Chevrolet Suburban 1500 LS 5.3L transfer case VIN: 1GNFK16Z55
Thank you all for the help. Steve, Frank, Alek and Robert hit it on the head It was the ABS pump activating momentarily over small bumps. Disconnected the pump and took it for a ride , no noise. Plugged it back in hooked up scan tool another ride found right ...
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next