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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 25, 2009
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1998 Buick Riviera 3.8L No Start VIN: 1G4GD2213W
First off i can't beleave i am posting this on a GM 3800.We have always been able to troubleshoot and repair this engine. Anyway i could use some help on this one. The car was towed here from a shop down the road.The 3800 code one supercharged engine has good ... Trouble codes: P0706 (also po705 all are low voltge coodes), P1646 (po122-), P0122, P0403 (p0405-), P0405 (p1122-), P1122 (testing and results)
2004 Buick Rendezvous CX 3.4L 4th gear Flair/Slip VIN: 3G5DA03E04
I'm not sure if this vehicle had a 4th gear flair/slip prior to working on it, of course the customer will say no. The vehicle had come in because the vehicle would not start in park @ times, and continued to get worse with time. Complaint of door locks not op...
1988 Chevrolet Corvette 5.7L Cuts out
I have an 88 corvette that cutsout at idle and off idle. I checked the computer for codes and found code 42 EST problem. I installed a new ignition module and I still have the same problem. Today I am going to follow the trouble code chart. I think I may have ...
1994 Chevrolet Camaro Z28 5.7L Interior VIN: 2G1FP22PXR
help chevy guys this z28 keeps blowing horn and courtesy fuse aadata wont come up so no wiring diagrham thaks in advance for help jimmy
2001 Chevrolet Monte Carlo SS 3.8L Surge VIN: 2G1WX15K31
This is my first posting on iATN. My 2001 Chevy Monte Carlo 3.8 Liter surges and hesitates under a load, yet at idle it runs well. After checking fuel pressure, vacuum, and exhaust backpressure I cleaned the injectors with a can of injector cleaner. During the...
2003 Chevrolet Astro 4.3L No Start VIN: 1GNDM19X13
this truck got towed in on friday the driver said that the truck behaved funny before stalling and not restarting the fuel guage went all the way up and then dropped and stayed there as well as some of the instrument cluster lights flashing at him as well. the...
2003 Chevrolet Trailblazer North Face 4.2L Hesitation, Surge, MIL Lamp on VIN: 1GNET16S53
I just replaced the PCM in hopes this would clear up the problem,But It didn't. The 5 Voltage problem is the culprit. Using My DVOM and the 5 volt Pin,coming from the PCM it will vary from 3.00 volts to 4.50 volts,Can't find anything else wrong,Just the varyi... Trouble codes: P1635, P1221
1995 Pontiac Grand Am SE 2.3L tachometer VIN: 1NL48JFF89
i get a hertz signal from white wire that goes up with rpms voltage stays .765 volts, white wire comes directly from ecm and it shows it might tie in one place on diagram but doesnt say where, im going to try an analog rpm tester tomorrow, but would like to kn...

Fixes & Summaries for GM
Fix/Summary Answers
1996 Cadillac Eldorado 4.6L engine VIN: 1G6EL12YY0
first of all thanks to everyone that took time to offer help. i removed the timing cover to look for debris in oil pump. found none. reassembled and performed process in bulletin . torque balancer and overfilled crankcase with 10 qts. started up and oil press...
2003 Chevrolet Trailblazer North Face 4.2L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1GNET16S53
I want to Thank all of You that Helped in my dilema. I did some checking of the system,and found out the PCM was/is the problem. The 5 volt reference was flucutating,from 3.00 to 4.50. Have a New PCM coming for it,So I'm posting this one Fixed,But I do want to... Trouble codes: P1635, P1271, P1221, P1220, P0452.
2005 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: 1GNDMI2WL2
Sorry guys it took me so long to answer this one.First i wanna thank everybody who replied to this problem.It did turn out to be the air valve on the side of the head.It was stuck and i dont reccomend cleaning it.Just replace it and the mil light will not come... Trouble codes: P0140.
1996 GMC Jimmy 4.3L dies when stopping VIN: 1GKDT13W8T
Pulled the fuel pump assembly and found that there has been an aftermarket fuel pump used with the flex feed hose replaced by a rubber fuel line which was kinked. Also found the strainers plugged. I believe the fuel line was restricting fuel flow along with th...
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