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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 3, 2005
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Open Help Requests for GM
Help Request Answers
1994 Buick LeSabre Limited 3.8L control head VIN: 1G4HR52L0R
If you set the temp Iin the middle it will either go full hot or full cold by it self. Then you reset and it will work for awhile and then start doing it again.
1997 Buick LeSabre Custom 3.8L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1G4HP52K3V
Customer Complaint of vehicle missing & surging when cold with the MIL lite on. Customer brought vehicle to a "tune-up" shop and they installed AC Delco 14 plugs and new wires. Vehicle still missfiring when cold and has codes P0171 and P0300. I found cylinder... Trouble codes: P0171, P0300 (missfire detected)
2002 Buick Century Custom 3.1L wipers VIN: 2G4WS52J12
When this vehical first came in the wipers stay up when they were turned off. We replaced the control module. The wipers now stay up during the delay setting. We replaced the wiper motor nothing changed. We got a different control module thinking the first one...
1993 Cadillac DeVille 4.9L vehicle speed VIN: 1G6KD5281R
After replacing transmission would not shift into any gear was stuck in third gear. Replaced transmission again. Now shifts all gears but not overdrive. Im thinking its got a bad transmission still, but after the third transmission the idle is excessively high...
1995 Cadillac Seville STS 4.6L ebcm VIN: 1G6KY529XS
this one has poor running, cruse inop, displays traction disabled, codes listed elsewhere in this post. i'm thinking the code 73 is causing my poor running, scan tool displays -20 for timing all the time, trying to diag the ckt and the component locations and ...
1993 Chevrolet Lumina 3.1L Poor Fuel Economy, rich VIN: 2G1WL54T3P
car runs very rich especially on cold start. coolant temp is good air temp also good. block learn 128. long term trim 110. map is new and reading 18-20 inches vacuum. fuel pressure is good with no drop or loss with engine off. pressure regulator is dry no leak...
1997 Chevrolet Express 2500 5.0L Lifters VIN: 1GTFG25M8V
This customer has came to me with a problem that I have never seen like this before. He says that this has started in the last few months. In the morning and not every morning, when he start the engine the lifters are very noisey. They seem to be getting worse...
1999 Chevrolet Tahoe 5.7L fuel gauge VIN: 1CGK3R4RUY
Hi guys, I have this vibrating fuel gauge that is driving me crazy. It vibrates when the truck is idling and vibrates faster with engine rpm. When you come to a stop the needle will jump 1/8 of a tank from where it was and will vibrate back to where it was. A...
1999 Chevrolet C1500 LS 5.7L iner axle seal VIN: 1GCK3R4RSU
this customer is complainig of a quarter size oil stain every night on his garage, i foun out the problem is the iner axle seal on the front differentia ( 4wd) drivers side i tried puling the axle out and i couldn't, no matter how hard i pull on the iner axle ...
2005 Chevrolet Silverado 1500 5.3L intermediate steering shaft VIN: 2GCEC19T65
customer bought vehicle from us new. he has returned several times with the complaint of a noise in the steering. today we r&r the steering shaft and still have the noise. help?
1989 Oldsmobile 98 Regency 3.8L Cuts out, Stall VIN: 1G3CX54C1K
My shop has been an udercar shop for 20 years, so forgive me for not using a scope on sensors. My problem is using a spark tester, spark is very weak on half of coil pack. I can swap blue wires to opposite side of coil and which ever side your color coded wire...
2003 Oldsmobile Alero GL 2.2L Shuts off on its own VIN: 1G3NL52F33
Hi guys. This Olds has a small problem with the cruise control. When you are driving with the cruise set at any speed over 70 mph the cruise will just disengage when ever it wants, and can be reapplied. With the Tech II no codes and no abnormal data is viewed ...
1998 Pontiac Grand Prix SE 3.8L Engine VIN: 1G2WS52M4W
Has any one seen alot of failures with the gm 3.1 engines. I have 3 in the shop right now with the exact same symptoms of no oil pressure and wont run. If you do get them to start they knock very bad and cut off immediatly. Any help would be great.
2000 Pontiac Grand Prix GT 3.8L Surge, MIL Lamp on VIN: 1G2WP52K9Y
Hello fellow members,Thanks in advance for any input on this one.Customer complaint is loss of tachometer and traction control lite comes on,short "chuggle" when the light comes on, was able to test curcuits 573 CKP to ignition module,curcuit 647 18X signal fr... Trouble codes: P0336, C0236 (traction control system rpm signal malfunction)
2001 Pontiac Sunfire GT 2.4L No Start, Cuts out, Stall VIN: 3G2JD12T11
hi peaple hope someone has seen this, vehicle came in with intermittant no start,fuel pump cuts out everything shuts down this does not stay off long to diagnose then it re starts. it sets off a few codes probably just on the shut down,i presume the problem is...
2001 Pontiac Grand Am SE 2.4L No Start, Stall VIN: 1G2NF52T51
Hey guys thanks in advance. Here is one for you GM guys. This car originally came in on my day off as a cranks but won't start. I understand that it started for the tech, and my boss convinced himself that it was in the ignition. Hence the ignition mod and s... Trouble codes: P1632 (received disable fuel code from bcm), B2958 (passkey circuit shorted to voltage), B2960 (incorrect code or password received)
2002 Saturn L100 2.2L anti-thief & fuel gauge VIN: 1G8JS54F72
We have a nice one here. A fellow shop owner had stopped by and picked up some wiring diagrams and info on the anti-thief for this car a couple of days ago. He later called and asked if I would take a look at it. A little history: Car presented with no turn s...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Riviera 3.8L Poor Idle Quality, Cuts out, Stall, START AND STALL VIN: 1G4G02217S
Well it looks like we got it. We replaced the ECM and all our problems are solved. It only made sence after checking powers and grounds at ecm, and icm. There was no interuption, and no loss of crank signal. We also checked the ignition switch before jumping i...
1996 Buick Regal Gran Sport 3.8L engine VIN: 2G4WF52K1T
Thanks for all the replies,checked out the pcv valve, vaccum leaks ,front dampner all ok. I believe it is a loose valve seat. After running a bit longer and harder the noise would quit, for a few seconds, go back to idle it would start up again this time with ...
1995 Chevrolet S10 2.2L MIL Lamp on VIN: 43JN5I7K95
thank you all tech. after cleaned egr did not help. i have to replace egr, took care problem. Trouble codes: 32 (egr problem).
1997 Chevrolet K1500 Cheyenne 5.7L Poor Idle Quality, Cuts out, Poor Fuel Economy VIN: 2GCEK19R8V
well it seems that a upgraded injector unit from the GM house fixed this one. The upgraded unit has mini injectors instead of poppets. All seems well customer is back on the road.
1998 Chevrolet Tracker 1.6L MIL Lamp on VIN: 2CNBE1862W
Thank you everbody for helping me fix my problem. I found the problem that was the EGR port was pluged half way at the intake manifold. Thank you everybody for helping me so much!!! Trouble codes: P0400.
1995 GMC Yukon SLE 5.7L Excessive Emissions, Hesitation, Cuts out, Misfire VIN: 1GKEK13K5S
O.K. I want to thank everyone that has offerd their input on this problem child of mine, I do appritiate all the tips, from everyone.I am sad to say I was never able to solve the problem, and my shop has given up on this truck, and me repairing it.Not my chois...
1997 Pontiac Bonneville SE 3.8L Misfire, MIL Lamp on VIN: SVH2144671
thank you all tech .removed coil pack found ignition module very hot. replaced module fixed the problem. Trouble codes: P0300.
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