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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for March 14, 2005
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Open Help Requests for GM
Help Request Answers
1998 Buick Park Avenue 3.8L anti-theft VIN: 1G4CW52KXW
no-start. installed anti-theft module. i did the key off and on for 10 min. then off for 10 sec. three times. cust. took delivery,drove over the week-end. mon. morn. no-start.is there any way to by-pass anti-theft system.some one with gm. exp. cust. request
1987 Cadillac DeVille 4.1L Timing Chain VIN: 1G6CD1180H
My own car,started out as R&R of Haronic Balancer/Pulley due to slipped so unable to check Ignition base timing . Timing cover was leaking for awhile and condition of chain was unknown,soooo I tore into it,found chain loose 5/8" play,ordered new set,9/16" play...
1992 Chevrolet Cavalier RS 2.2L No Start, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire VIN: 1G1JC5448N
Four days wasted so far. This car came in running and driving but would stumble and surge on heavy acceleration. I checked fuel pressure and it was 47 Unregulated and 40 with 10 inches of vac applied to regulator. Scanned for codes and got code 33 map out of r...
1997 Chevrolet Express 1500 5.7L Fluid Temp, brake switch, pressure switch VIN: 1GBFG15R4V
VSS showing eratic on the scan tool but works fine on the speedo, shows no brake switch operation on scan tool but brake pedal will disengage the cruise. Shows -40 degrees on the trans temp but when the speed senor starts to send a signal the senor shows 29 de...
2000 Chevrolet Venture 3.4L Speed O meter VIN: 1GNDX03EAY
Van was brought in for erratic speedO operation. Scanned vehicle had no codes. picked up vehicle on hoist and monitor speed O on scanner and while on hoist speedometer and scanner speeds matched.But while driving vehicle speedometer goes from 10 mph to 45mph a...
2001 Chevrolet Express 2500 4.3L blower fan
Hey techs, sorry about no vin left it at work-went home for lunch. Have this plumbers cargo van blowing #12 fuse in under dash fusebox. Already replaced the blower resistor/relay under hood on case-came back 2 days later fuse blown again. Replaced blower motor...
2001 Chevrolet Blazer LS 4.3L transfercase VIN: 1GNCT18W61
Sunny dry day ,customer shut off vehicle @store ,came out and the transfercase defaulted to 4-lo.It will not come out of 4-lo but tries, and makes quite a bit of noise doing so.The customer said she did not touch any of the buttons on the auto 4x4 panel, she j...
2003 Chevrolet Express 2500 5.3L Poor Idle Quality, Misfire VIN: 1GCFG25TX3
Truck came in with multiple misfires, mostly 1,8. Also MIL worked sometimes. Found TSB for wiring problem near l/f upper control arm. Repaired 4 wires that the convelute tubing wore through the ecm wiring, that got inj 1, inj 8 and the MIL working properly. No... Trouble codes: P0200, P0300
1988 GMC C1500 Sierra 6.2L transmission VIN: 1GTDC14KJZ
this vehicle came in for several problems. it was surging at idle,hesitating, code 43, late shifting, slipping, and a chuggle/jerk/buck (however you wish to describe it)at 35-45 mph in lock-up. all ignition pieces were oe and showing it. was getting "funny" pa...
1997 GMC Yukon SLE 5.7L MIL Lamp on VIN: 1GKEC13RSV
I inspected all the parts that he had replaced and all seemed fine. Alldata led me to belive that the distributor was off one tooth (cap is marked for 6 or 8 cylinder). While at TDC on number one cylinder, I pointed the rotor at #8. Still had the misfire; trie...
1999 Saturn SC2 1.9L monitor reset VIN: 1G8ZHI273X
Hello fellow techs, The vehicle that I'm posting has us confused as to the reason that the "cat" monitor will not run to completion. We have ran every possible drive cycle that GM has and even return the vehicle to the customer for the weekend to see if the dr...
2002 Saturn SC2 1.9L Stall, Misfire, MIL Lamp on VIN: 1G8ZY12712
Hello, This vehicle was towed in because it would crank but not start. The customer said the MIL light had been on for 2 weeks. It had been starting hard, then would run rough and then stall. It finally failed to start and it was towed. We replaced the plugs, ... Trouble codes: P0341 (CMP Out Of Range)

Fixes & Summaries for GM
Fix/Summary Answers
1995 Chevrolet S10 LS 4.3L Poor Idle Quality, Cuts out, Stall, Misfire VIN: 1GCCS19Z1S
Thanks For all the Help folks most of you keyed in on the EGR valve sticking, as soon as read these I knew too. Replaced EGR valve and truck runs fine. I became fixated with the tune up stuff and quit looking at the whole system. Good call and again thanks for...
1996 Chevrolet K1500 6.5L Mechanical VIN: 2GCEK19S3T
thank you all for the replies.even though the gentleman says he never used the e- brakes we took a chance and cut them off and the problem went away.we installed new cables on today.we are in quite cold climates here and i think he is on alot of gravel poss th...
1997 Chevrolet K1500 Cheyenne 5.7L Dump valve VIN: 2GCEK19R0V
The problem was the combination valve. Gary from Kalamazoo sent me a 10 page test for GM low brakes. The article came from Bill Williams writing for Brake and Front End June of 2001. It is a very good article and I will go online to see if I can print out the ...
1997 Chevrolet C3500 6.5L Cuts out, Stall VIN: 1GCGC33F2V
Replaced injector driver and also did relocation mod. suggested by most of the responding techs.
2000 Chevrolet Impala LS 3.8L brake lights, turn signals VIN: 2G1WH55K2Y
customer would not approve any further diagnostics. we tried turn signal switch, hazard switch, checked all bulbs and did not find the problem. customer has decided to sell car.
1996 Geo Metro LSi 1.3L engine VIN: 2C1MR5294T
it's fixed!!! i am very gratelful for all of the responses i recieved. 5 of the 11 responders told me to check the crank sprocket keyway. i had looked at it without taking the sprocket off and it looked ok. however, since so many people mentioned it, i took th...
1993 GMC Jimmy SLE 4.3L Mechanical VIN: 1GKDT13W5P
I have a strange but belivable fix on this one. It turns out this model year has 2 trans dipsticks available. I happened to have the wrong one. I checked line pressure and it was in specs. Since it was acting like low line pressure or a low fluid level I added...
1994 GMC Jimmy SLE 4.3L Hesitation, Stall VIN: 1GKDT13W8R
Thanks to ALL that replied. I guess I failed to mention. it was a No Start situation. After rechecking EVERYTHING the other shop did, I found They had not installed the rotor properly and a craked dist magnet. I THANK YOU ALL. Customer VERY PLEASED!
2003 GMC Sierra 1500 SLE 4.3L engine VIN: 2GTEC19X93
Thanks to all that replied. I never did find the source of the noise but I did eliminate some things.One reply said to ck for an air pump noise ,well this truck doesn't have one so it wasn't that.As I said in my original post the noise would only occur in cold...
1991 Saturn SC 1.9L No Start VIN: 1G8ZG1475M
I received lots of helpful information from all that replied. I did find one ECM fuse hanging about 1/2 way out, I cleaned the contacts and reinstalled it and got steady battery voltage to the injectors. No ground pulse though. I got to work this morning, and ...
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