× 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 November 4, 2010
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
1994 Buick Century Custom 3.1L Hesitation, Cuts out, Misfire VIN: 1G4AG55M4R
Ok this one for the older Techs! Problem.. Vehicle hesitates and may backfire on accel. (Intermittent) No codes. Under hard power braking I can feel very a slight misfire. Feels like a restricted exhaust, yet is intermittent. (New Cat). Ohm tested injectors,...
1998 Buick Park Avenue 3.8L Electrical VIN: 1G4CW52K7W
Hi everyone, We have this car that runs the battery down over the course of about a week. The owner doesn't drive it very often. It sits in his garage one or two weeks before it gets driven. We get about 97 milliamps battery drain after about five mintues when...
2001 Chevrolet Tahoe LT 5.3L air conditioning VIN: 1GNEC16T51
hello a/c techs this chevy tahoe has no cold from front a/c and rear is getting cold ambient temp. is 95 deg. hi side 275 low side 45 low side line is cool. block off heater hoses rev. to 2000 rpm temp. inside car goes to 52 pretty cold take off clamps on heat...
2002 Chevrolet Silverado 2500 HD 6.6L Glow Plug VIN: 1GCHK23132
Basically two glow plugs have had their entire cores pulled out. So I'm wondering if anyone has removed the threaded part without removing heads. Just want to replace the two broken glow plugs and send him on his way. Maybe there is a special tool for removing...
2002 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: 1GNDT13S12
Hi techs . I have looked on the posts for a real answer on this one but not sure if posts had a real true answer. My problem is that had this Trail Blazer on the lot for a few months and never had a problem . So we go to sell it and the check engine light is o... Trouble codes: P1345 (crank/cam sensor correlation), P0014 (cam phaser performance), P0340 (camshaft postion sensor problem)
2003 Chevrolet Silverado 2500 HD 6.0L lug studs VIN: 1GCHK29U73
this truck has wheels studs that break off . this truck is used on train tracks so the rims have an inward offset. I think someone is over torquing lug nuts but before I do I wanted to know if anyone has ran into this .
2004 Chevrolet Silverado 1500 4.3L Air bags VIN: 1GCEC14XX4
Vehicle came in for a service air bag light being on. Checked for codes and found front right crash sensor malfuntion. We followed the diagnostic tree and tested the right front crash sensor tests came back fine. We tested the wiring between the SDM and the se...
2005 Chevrolet Silverado 1500 5.3L Theft VIN: 2GCEK13T45
I've got a gooder this time! This truck was sent to me by a salvage shop that puchased from insurance company. Truck was stolen- no keys. Customer had key made by GM from VIN and dropped it off to me before truck arrived. Correct key opened door but didn't tur...
2007 Chevrolet Tahoe LT 5.3L MIL Lamp on VIN: 1GNFC13097
This sad tale begins as many evap. stories seem to with repeated trips to the dealer with no resolution.Apparently service bulletin 09-06-04-028 did not yield the desired results.This unit belongs to a family member , who at this point is not going back to the... Trouble codes: P0442, P0455
2008 Chevrolet Silverado 3500 HD LT 6.6L abs VIN: 1GCHK33678
I was hoping some GM tech could give me some help with this one. This truck came in with ABS and Brake lights on also said trailer brakes inop. I tried to scan abs and trailer but had no comm.also no comm with esp. scanned bcm had code u0137 forlost comm.Scann...
2003 GMC C4500 Topkick C4C042 6.6L Fuel system
Hey guys looking for a little insight here. This truck came in today low oil pressure running very rough. Blowing oil out the pcv tube. Found oil reading about a foot up the dipstick. Drained the oil and found about 2 gallons of diesel fuel in the crankcase. R...
2004 GMC Sierra 3500 6.6L Cuts out, Misfire VIN: 1GTJK39124
Diesel performance junkies we need help! vehicle has violent miss under acceleration with edge perf. Box turned on any mode. Problem began with original edge box only when it was turned on. Edge replaced unit with new box but same problem w/vehicle when box is... Trouble codes: 0089C, 380 (Glow plug circuit), 0090A, 193A, P0374 (Timing ref. High resolution signal a no pulse)

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Rendezvous CXL 3.4L Differential VIN: 3G5DBO3EX2
customer decided to bite the bullet and go back with oe
2001 Chevrolet Express 1500 5.0L MIL Lamp on VIN: 1GNFG15M41
The vehicle still is running well but the CEL does come on. The customer didn't want to spend any more money on it. Thanks to everyone that replied!! Trouble codes: P0300, P0306.
2001 Chevrolet Express 1500 4.3L No Start, Stall VIN: 1GCFG15W11
Sorry guys,got a couple good ideas but customer pulled vehicle (after pitching a fit about the diagnostic bill), good luck to the next shop. We did verify that all reference signals were present and good, just never could make it run.
2003 Chevrolet Blazer ZR2 4.3L front VIN: 1GNCT18X23
the fix was in the transfer case it would not lock all the way in 4 wheel drive and that cause the gear to round off and not let it lock the front end.
2005 Chevrolet Silverado 2500 HD 6.6L MIL Lamp on VIN: 1GCHK23225
installed new oem egr vlv assembly and passed 4 drive cycle test so far. returned to customer today. when engine reached 140 f the egr started working normally after repair. Trouble codes: P0401, P0404, P1404.
2006 Chevrolet Silverado 2500 HD LS 6.6L Tcm VIN: 1GTHK23D26
glow plug module faulty. Flashed all other modules.
1998 GMC K1500 Sierra SL 5.7L fuel guage VIN: 2GTEK19R7W
Thanks for the help guys. As most of you said it was the guage cluster. I wasnt really looking at the cluster before because we had replaced it already with a gm unit. But another new one fixed the problem. Thanks for the help.
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next