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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 19, 2007
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1986 Buick Century Limited 3.8L ignition VIN: 1G4AL1933G
this car came in as a no start. we checked for spark and had none. next we checked for a crank signal and had none. we replaced the crank sensor and still had no spark. but now we have a good crank signal. the cam sensor signal is good as well. we have a signa...
1993 Cadillac Eldorado Sport 4.6L No Start VIN: 1G6EL12Y6P
Hello Techs. I have this caddy giving me a fit. All data specs say fuel pressure should be about 40 psi and i am getting 75psi at idle and it bleeds off slowly when vehicle is shut off. It starts fine cold but if you drive it to normal operating temp. then shu...
1999 Cadillac DeVille 4.6L Slight Miss VIN: 1G6KD54Y4X
Good day to all, We have a 99 Cadillac DeVille that has a miss when the engine is first started up. Originally it would occur after sitting over night and then progressed to 2-4 hours of sitting and now the customer states today, that after about 1 hour of sit...
1995 Chevrolet C1500 4.3L Stall VIN: 1GCEC14Z8S
Hi techs, I have a problem finding how to adjust the base idle, someone tampered (customer)with the adjustment! I maybe mistaken but i thought you by-passed the aldl to run in the iac and go from there. All info that I find is iac ignition cycles after disconn...
2001 Chevrolet Malibu 3.1L No Start, VTD flashing VIN: 1G1ND52JX1
Vehicle was no-start with flashing theft warning on IP. It has no codes in PCM, and BCM had history u-codes, ABS had codes in history as well, comunication and RF wheel speed sensor code stored. It has an intermitent no-start, and in June of this year had both...
1995 GMC C3500 Sierra SLE 6.5L Cuts out VIN: 1GDKC34F8S
gmc or mechanics who have experience with those type of trucks,the truck where cut off when hot even in idle,we replaced the fuel pump and clean fuel filter in the tank,yhe car ran for almost a day then the owne brought the truck back and complaning about the ...
1999 Pontiac Grand Prix SE 3.8L Poor Idle Quality, Stall VIN: 1GFJUW5678
hello everyone this car came in with a intermittent stall at idle and sometimes at a stop when turning wheel idle will go down and rev up to about 2000 rpm car has no codes runs fine other than that need help thanks
2001 Pontiac Bonneville SE 3.8L No Start VIN: 1G2HX54K81
I have replaced the iginition swith per GM Bulletin 00-08-49-015 which did not resolve the issue. I was able to replicate the condition. A quick turn to start of the ignition and no crank. I quickly tried again...still no crank. The third time I switched the k...
2002 Pontiac Grand Am SE1 2.2L No Start VIN: 1G2NF52FX2
I need some guideance on this problem. First customer came in and requested to put in a fuel pump and filter. They supplied parts and declined any diagnostic. It was a factory Fuel pump assembly. I installed and still no start. so check the obvious and I have...

Fixes & Summaries for GM
Fix/Summary Answers
1989 Buick Reatta 3.8L Poor Idle Quality, Misfire VIN: 1G4EC11C5K
I did try to run injector #3 from #6 and had poor results. I am leading to major wiring issues, of the intermittent kind. The cars runs O.K. then not.The harness surely needs to come out and be checked one wire at a time. The customer wanted this car to be put...
2000 Buick Regal GS 3.8L Cuts out, Stall, MIL Lamp on VIN: 2G4WF5515Y
Found Supercharger valve on intake intermittenly sticking open thanks for all the help this one really was about to get me
1990 Chevrolet C1500 Cheyenne 5.7L Poor Idle Quality, Cuts out, Stall, Misfire VIN: 2GCEC19K4L
I'v been to 2 goat roppin's & several county fairs & ain't seen nothing like this before. In 34 yrs of this mechanical mahem I have yet to cross a distributor with the reluctor wheel loose on the shaft. Apparently I have been under a rock somewhere as about 25...
2001 Chevrolet Silverado 1500 4.8L turn signals VIN: 2GCEC19V21
Most of the responses posted pointed to a problem with a ground wire. So I retraced all the grounds and came to one attached to the radiator support which was bad. Fixed it and now everything works fine. The problem was so simple that I could not believe I mis...
2005 Chevrolet Silverado 1500 4.8L Poor Idle Quality VIN: 2GCEC19VX5
Everyone thank you for taking the time to help with this problem, I took another truck and monitered data, and voltages, and everything seemed the same so then I decided to swap the throttle plate assembly, and that seemed to fix it. So I replaced it with a ne...
1994 GMC Sonoma SL 4.3L hydraulic VIN: 1GTCS14Z8R
Thanks to IATN it's fixed! It was the ABS HCU as several had advised. I wanted to be able to check the HCU for a leaking dump valve before I replced it but was unable to do so. I found a very good article on diagnosis of 4WAL at ...
2003 Oldsmobile Aurora 4.0L No Start VIN: 1G3GS64C23
ok, i posted this fix last week, but i guess it didnt go through, so i will try agian. sry for the delay. it was accually just what i thought. you need the tech 2 and the gm TIS2000 program to get past the theft deterant. i had the tech 2, but not the prog...
2001 Pontiac Bonneville SE 3.8L Ignition VIN: 1G2HX54K81
Good Morning Gents...well as history has it, the ignition switch did not resolve the issue. The customer returned the vehicle with the same issue. Once I had it in my hot little hands...I was able to duplicate the issue. I am going to repost. Thanks to all...
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