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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 6, 2006
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Open Help Requests for GM
Help Request Answers
1998 Cadillac DeVille d'Elegance 4.6L Stall VIN: 1G6KE54Y1W
Thanks for your time in reading this. Customer concerns are a stall on decell or at stop lights, he states it usually happens while driving below 40 mph. I have not been able to reproduce the concerns. I initiall replaced the crank sensors and fuel pressure re... Trouble codes: P1599
1989 Chevrolet Cavalier Z24 2.8L Excessive Emissions, Poor Idle Quality VIN: 1G1JF31W8K
hey guys Ive got an ugly one on my hands.This car came in for an emmission test,after it failed miserably the customer told us it had failed a number of times before and he had been trying to fix it for three months.I found the ecm loose in the glove box with ...
1990 Chevrolet G10 Sportvan 4.3L Hesitation VIN: 1GNDG15ZXL
this van is driving us crazy. under accell if falls flat on its face. we tried dropping the exhaust at the manifold thinking the cat was plugged but that was not it. when problem occurs, if we spray choke spray down the tbi unit the van picks right up. we saw ...
1993 Chevrolet K2500 Cheyenne 6.5L 4th gear/overdrive VIN: 1GCGK29F0P
test tps with all test. sweep test good. cleared trans codes. turn on key & code emediately returns. clear codes & hold throttle open before turning on key computer stays out of limp in mode & can read tps voltage. allow trottle to drop back to idle & computer...
2000 Chevrolet Impala 3.4L Cuts out, Misfire, MIL Lamp on VIN: 2G1WF52E6Y
this is a real hair puller. vehicle came in with complaint of no power and no overdrive. we found that the od was working ok, but at the rpm mentioned. it would start to misfire. it had several codes, but the only ones we could reproduce on a regular basis wer... Trouble codes: P0300 (multiple cylinder misfire), P0304 (cyl 4 misfire)
2001 Chevrolet Cavalier 2.2L engine
Car will not start. It does crank & has no spark. Once in a while it will start
2002 Chevrolet Venture LS 3.4L No Start VIN: 1GNDX03E42
We have this Venture that is a wheel chair accessible conversion. About once or twice a week after sitting overnight. It will not start. It has good cranking and good spark but, no fuel pressure. Sometimes there will be a code for fuel pump enable circuit. (th...
2003 Chevrolet Tracker 2.5L Starting VIN: JNNE34KN3W
650 ma.draw always dome lamps go off as designed ,but there is a 650 ma. draw on that circuit...any help in this area would be truly apprecianted,,,thanks in advance doug.
2005 GMC Sierra 2500 HD SLE 6.6L MIL Lamp on, low power VIN: 1GTHK23215
Intermittently CEL comes on and engine looses power. Happened only once since we had it and we cannot duplicate it while in the shop. We think itís related to TSB 05-06-04-047B but are not sure. We tested the wiring from the control module to the injector and ... Trouble codes: P0207 (Cylinder 7 injector circuit problem), P2146 (Inj Pos Voltage control Circuit Group 1)
1995 Pontiac Bonneville SE 3.8L Poor Idle Quality, MIL Lamp on VIN: 1G2HX52K43
Hello, Car came in with a intermittent check engine light on and a rough idle complaint. When I checked for codes there was no comunication with the ecm. We checked the power and grounds at the data link, (OBD II style), and the continuity to the computer fo...
1996 Pontiac Grand Am SE 2.4L ignitio VIN: T7TC775415
hey whats up already this vehicle was running fine the customer replace battery and now the vehicle wont start. it will start and dye out in 3 sec. i check all wiring and everything seems fine. i try hooking up a scanner but it wont reade my scanner. also try...

Fixes & Summaries for GM
Fix/Summary Answers
1989 Buick Electra Park Avenue Ultra 3.8L 1-2 shift VIN: 1G4CU54C6K
Well, this sick puppy is on the road again. Thanks to all who took the time to respond, and especially to Tony Potter from Connecticut. His wisdom was invaluable in this fix. Tony had me to remove the governor, pull the side cover (after lowering the side fram...
2001 Buick Park Avenue 3.8L power door locks,windows,mirrors VIN: 1G4CW54K61
Sorry for the late post, the problem was the bcm and the LF door module.After installation and reflashing of the bcm we had communication. After many non productive hours we finally replaced the left front door module also.We just applied logic after doing as ...
1992 Cadillac DeVille 4.9L ABS codes VIN: 1G6CD53B7N
Thank You to all that took time to read and replay. When the car came in it had right speed sensor and PMV codes, tested and speed sensor was found to be bad, PMV tested fine, replaced right wheel bearing with speed sensor and tried to clear codes nope. Drove ...
1996 Cadillac DeVille 4.6L all upshifts VIN: 1G6KDF2Y8T
Thanks to all who replied. the problem turned out to be bad valve body. i replaced it with one from the dealer and everything worked great. i don't know exactly what failed on the original valve body.
1994 Chevrolet Blazer 5.7L Cuts out VIN: 1GNEK18KOR
Thank you to everyone that dedicated time to help me with this inconvenience. My corrective action was removed and replaced ignition coil. Very simple, and again thank you.
1997 Chevrolet Malibu 3.1L cruise control VIN: 1G1ND52M6V
Well guys I followed mitchel over about four times and it led me to replace the CC module/servo. I did with two differant ones, and problem remained. Customer did not want to spend anymore time on it. Thanks anyways for the replies
1997 Chevrolet Astro 4.3L steering box VIN: 1GNDM19W8V
Replaced Sector and problem is gone, valves in sector were found to be stuck
1999 Chevrolet Astro 4.3L Surge VIN: 1GCDM19W6X
The customer finally brought the van back to have us go thru it again. As it turns out,it was in fact the TPS. had a portable lab scope and was able to catch it glitching. Thanks to all who tried to help and especially to Kent who got me pointed in the right d...
1990 GMC K1500 Sierra SLE 5.7L Unknown VIN: 1GTDK14K7L
thanks for all the great responses on this many of you were right on (as usual) the rear anti lock valve was the problem.with vehicle stopped, pressure to rear brakes were good.would squirt fluid across rear axle.with the back off the ground and running in gea...
2004 Hummer H2 6.0L rear a/c VIN: 5GRGN23U04
Customer found a compressor kit for the limo. A company in Orlando says that this will fix the problem. When I install the kit, I will post my results in the A/C forum. Thanks to all who helped.
1991 Pontiac Sunbird LE 2.0L No Start VIN: 1G2JB54K3M
Thank you all for great responses I feel at home with this community, concesus was bad pickup coil, the fix was complete distributor assembly (used and it looked better than the reman it had in it)...thanks to Tim from Minnesota made the diagnosis simple and J...
1996 Saturn SC1 1.9L all shifts VIN: 1G8ZF128XT
Thanks for all the suggestions guys. I ended up buying a used transmission and rebuilding it and problem solved. I did check that the previous transmission was correct for the car.Also the problem with the vss and turbine sensors not reading was my wonderful s...
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