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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 15, 2004
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Open Help Requests for GM
Help Request Answers
1966 Cadillac Deville/conv 429CID vacumn controls
Hello to all & thanks in advance for any help on this caddy.I am looking for vacumn & wiring diagrams for the heater & a/c controls.The system on this called comfort control.If anyone has or knows where I can find these diagrams,it would be greatly appreciated...
1979 Chevrolet K10 Cheyenne 5.7L park VIN: CKL1495203
wont stay in park frt end pointed down and will park when frt end up
1993 Chevrolet Caprice Classic LS 5.0L No Start, Cuts out VIN: 1G1BN53E7P
this car was brought to me with an intermintent no start checked for spark and fuel have strong spark and good fuel pressure but we are losing injector pulse i checked all wiring going from computer and have ignition power to injectors and ground from computer...
1994 Chevrolet C3500 5.7L MIL Lamp on, no communication VIN: 1GCGC34K7R
Vehicle was towed in for a no-start concern, cranks ok...upon checking we found no CEL...plugged scanner in, and was unable to communicate...later we learn that the customer tried to jump start w/a 36volt hi/lo...I found the PCM burnt real bad...I replaced the...
1996 Chevrolet K1500 5.7L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 1GCEK14R6T
i have got a good one for all of you this truck came in for a code p0340 camshaft postion sensor circuit code so i replaced the cam sensor cleared the codes and sent the truck on the customer didnt have anymore trouble for about 2 months when the light came ba... Trouble codes: P0340
1997 Chevrolet S10 LS 4.3L MIL Lamp on VIN: 1GCCS19X9V
no driveability problem the light comes on and off over the last year or so. I have gone thru the mitchell diagnostics for this code and it tell me to change the knock sensor module, because I have not found anything wrong with the system but goes on to say if... Trouble codes: P0327
1998 Chevrolet Blazer 4.3L Misfire, MIL Lamp on VIN: 1GNDT13W3W
Blazer has a very severe loss of power due to misfires in cylinders #1, #5,& #6 at highway speeds in OD climbing a grade. It only manifests itself after a steady acceleration for 10 seconds or so. FP holds at near 60 psi during the power loss.If you allow it s... Trouble codes: P0300 (random misfire)
1999 Chevrolet Tahoe LS 5.7L Excessive Emissions, Poor Idle Quality, Stall, Misfire, Poor Fuel Economy VIN: 1GNEC13R9X
HELP!!! The engine was replaced by another shop and it was at 2 others before coming to us. We got approval to replace almost every sensor on this vehicle. At startup when cold, the engine runs fine. After a couple of minutes it begins to miss severely and sta...
1999 Chevrolet C65 3126CC alternator VIN: 1GBJ6H1CXX
good day,hope some gm techs can help! we are a car shop, but have 2 medium duity tow trucks of our own. alternator doesnt charge and we dont have any wire diagrams or flow charts to diagnois the problem. terninal on the back marked relay has no voltage, other ...
2003 Chevrolet Trailblazer North Face 4.2L starter VIN: 1GNDT13S43
pulled this one in.starter will not engage.shiftb interlock will not work.all gauges are erratic going from o to all the way over. checked codes found none. can jumper starter & it turns motor but wont start. thanks jd
1990 Pontiac Grand Am LE 2.3L Excessive Emissions, Poor Idle Quality VIN: 1G2NE54DXL
Vehicle is failing Calif. ASM smog check for NOx, HC, and CO. The gases listed in the Idle section of this post are the 15/50 portion of the test. The gases listed in the Cruise section are the 25/25 portion. 15mph/50% load: measured-limits HC 130ppm-121p...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Century Custom 3.1L Hesitation, NO POWER VIN: 2G4WS52J52
this was a learning experience. the problem with the car is cat was pluged internally. even i checked with alldata and got the spec. 1.25psi at 2500rpm and took cat out and looked in both endes and looked fine.the spec was wrong, after talking to the dealer th...
1995 Cadillac DeVille Concours 4.6L Poor Idle Quality, Cuts out, Stall VIN: 1G6KF52YXS
After replacing this pcm a 3rd time, grounding case to chassis and installing a seperate ground from battery to ignition control module bracket, car has had over 200+ miles put on it with no problems. Thanks for all the input and replies.
1994 Chevrolet C3500 7.4L Hesitation, Surge, Cuts out, backfire VIN: 1GCHC39N7R
first, let me thank everyone for there replies. The owner opted to put in a reman distributor and try driving the vehicle rather than pay for our diagnostic labor and scope fee's. As of now, the truck is running fine. Again, thank you for your replies, iatn ha...
2000 Chevrolet K2500 5.7L 4wheel drive VIN: 1GCGK23R9Y
Thanks for the replies. Most sugested the selector switch as the problem. The drive motor for the transfer case had an open winding. It was sold as an assembly and included the encoder switch as well. Thanks again for the replies
1994 GMC Jimmy SLE 4.3L Cuts out, Stall VIN: 1GKDT13W1R
hi group got alot of great responseson this vehicleheres what we found, forgot to mention egr was ok sorry, hooked scope back upto ignition system and while checking coil output noticed that all cylinders would jump over 100kv during coil test ok, pulled distr...
1992 Oldsmobile Achieva S 2.3L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire VIN: 1G3NL1436N
Most everyone who replied said the coil cover. That was it. I should have known. I usually do everything for a tune up on this engine. I tried to side step that procedure and it bit me in the rearend. Thanks to all who replied. I greatly appreciate it as alway...
1995 Oldsmobile Achieva S 2.3L abs VIN: 1G3NL15D7S
We won this war, the fix was really simple actually. All we did was a complete rear brake job. We unplugged the ABS and drove the car, the left rear wheel locked up, took the brakes back apart again and can't honestly say that there was any real signs of being...
1972 Other GM cargo star 345CID timing gears VIN: 226811C085
Thanks to every one I emailed most directly But thanks I did not Know there where very many people that knew what a International was let a lone how to work on it well be tweene me and the owner we decided to in stall a reman eng I receved a lot of emails the ...
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