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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 7, 2006
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1999 Buick Regal LS 3.8L instrument cluster VIN: 2G4WB52K3X
dear fellow techinicians: we have a 99 buick regal with no instrument panel working. will not communicate with scan tool unless battery is disconnected and reconnected. will work for 5 minutes then speedometer and tach quit working. no idiot guages work. has ...
2003 Buick LeSabre Limited 3.8L ebcm VIN: 1G4HR54K43
Hello, We are having trouble with a warning that appears on DIC of this vehicle. The message is SERVICE STABILITY SYSTEM. The abs unit is a bosh 5.3 hybrid unit. codes c1287 and 1288 have returned after clearing. I checked the Steering Wheel Position sensor f...
1991 Cadillac DeVille 4.9L MIL Lamp on, Lack of power VIN: 1G6CD13B7M
Hey Guys,Runs smooth ,no power at all.Throttle to floor and still runs smooth just no acceleration.Replaced Cat. 375 deg. inlet 800 deg. outlet. still same. I checked for other sections of exhaust plugged found none.(All motor mounts bad)Its hot here in vegas ...
1991 Cadillac Fleetwood 4.9L Fuel data center and climate control VIN: 1G6CB53BXM
This car came in with the blower inop and the digital displays in the instrument cluster, fuel data center and climate control panel inop. The 16V wire had no power. I found the CCP shorted. Replaced the CCP and BCM and now the display for the instrument clust...
1997 Cadillac Seville STS 4.6L missfire at idle VIN: 1G6KY5291V
car came in for over heat found head gasket problem. did head job and repair head bolt theads. now car won't idle very well and check engine light on. code are po300.which is multipule random missfire. number 1-3-5-7 are missing at idle up to 1500 rpm. had num...
1994 Chevrolet S10 4.3L tint VIN: 1GCDT14Z7R
My window tint is peeling up. Is there a way to reglue it. its in good shape so if i can save it, i'd like to. What is the best adhesive. I hear some just use soap. Thanks
1995 Chevrolet K1500 Cheyenne 6.5L 3-4 shift VIN: 2GCEK196S6
vechile came in in limp mode ,trans stuck in 2nd gear tach and speedometer inop,checked fuses - trans fuse has no power,scanned vss reads ok,checked for open ckts ,none found had no symptoms before this faliure
1999 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1ND52J0X
Greetins to all tjhis malibu has a code for air injection system.Through the scan tool I can run the air pump and it does engage I removed the hose fromit and it does produce a lot of air.My question to you techs is,this valve has a vaccum hose going to it tha... Trouble codes: P0410
2001 Chevrolet Cavalier 2.2L engine VIN: 1G1JC52471
This one is killing me. Originally came in overheating, loss of coolant. I found no leaks, it appeared thermostat was not opening causing a no-flow condition. Replaced thermostat, refill per GM, road test ok Came back, same complaint. I diagnosed as air trapp...
2001 Chevrolet Astro 4.3L MIL Lamp on VIN: 1GCDM19WX1
I did a recent tune-up, everything was fine. Drove the vehicle for about 40 miles and ses light came on. Here's the part I don't understand. I hooked up my Snap-On graphing meter to search for codes. I went into every mode and there were no codes. I thought th...
1994 Pontiac Grand Am SE 3.1L Starter VIN: 1G2NE53MXR
This vehicle starts and run fine but ocasionaly when at operating temp will not start ,it will not even turn over. You turn the key and nothing happens.Tried in both park and neutral no diffence.Starts in both park and neutral all other times. There is no cu...
2003 Pontiac Aztek 3.4L drive train VIN: 3G7DB03E23
complaint is when turn sharp/ full lock a "moaning" noise appears at rear axle/diff area. normal turn and straight drive ok. have inspect drive train. ck. tire pressures, inspected and changed fluid. use versa trac, (suspect possible contamination). test...
2004 Pontiac Grand Am SE1 3.4L Misfire, Poor Fuel Economy VIN: 1G2NF52E94
Vehicle came in with a low power complaint. At 92000 we checked for codes and found none. Test drove and it felt like a wire breaking down. Suggested tune up which we were allowed to do and still the same problem. Changed type and grade of fuel still the same....

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Regal GS 3.8L Cuts out, Stall VIN: 2G4WF5519Y
The problem really acted up the other morning, all the lights on the dash were flashing and the vehicle would not even start.When it would not start the SES light was on real dim. I noticed that playing with the ignition switch would make the problem come or g...
2003 Buick Park Avenue 3.8L magna steer VIN: 1G4CW54K53
today customer stopped back in to see if i had any more ideas,i should have mentioned that no codes were present at 1st exam. told him what i learned from ,robert ,tony,matt and jack and that car was doing just what it was designed to do. after more conversati...
1997 Cadillac DeVille 4.6L engine VIN: 1G6KD54YOV
The customer did not want to do the head gaskets, or an engine, so we used 'block seal' and some GM cooling system suppliment to fix it temporarily. Thanks for the help. Ladd
1991 Chevrolet Corvette 5.7L No Start, Stall VIN: 1G1YY3381M
Yes!! This is a classic IATN help request, and why the IATN is my freind. Stan, Dan, Robert , Dave, Brian hit it on the head. There must be alot of V'ets in the Midwest becuase thats were most of the replies are from! We tested all the fuel injectors and found...
1995 Chevrolet G20 Chevy Van 5.0L MIL Lamp on VIN: 1GCEG25H7S
I did do voltage drop tests on my powers and grounds and they all were good.I went and got an ecm from dealer and all is well.It solved all my communication problems as well as my no power issue.
1998 Chevrolet S10 2.2L brake lights VIN: 1GCC51948W
thanx to all. found melted wires up under the dash for the chmsl. repaired these wires and all is fine
1998 Chevrolet C1500 Suburban 5.7L fuel gauge VIN: 3GNEC16R8W
thanks for all the input-got in touch with a ipc rebuilder and found a problem with a coil in the ipc unit-pieces not available -got exchange unit
2001 Chevrolet Silverado 1500 4.8L MIL Lamp on VIN: 2GCEC19V21
Vehicle has not returned.When customer returns I will definitly post a fix. Trouble codes: P0440 (evap large leak detected), P1637 (gen l term), P1638 (gen f term).
2002 GMC Envoy SLE 4.2L Poor Idle Quality, Cuts out, Stall VIN: 1GKDT13S52
This vehicle appears to be fixed. Since I was unable to duplicate the problem on any test drives, I waited a few days before declaring a 'win' on this one. The fix turned out to be the fuel module. I also replaced the crank sensor just to be sure. The replies ...
1994 Pontiac Firebird Formula 5.7L Excessive Emissions, Poor Idle Quality, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2G2FV22PXR
Thank you all for your help. It lead me to look at it in a way I might not have. Anyway, it turned out I had a bad distributor. The first one was defective. I had to change it twice. Then I found out I had diesel fuel in the gas tank. It would not go through t... Trouble codes: 18 (cranking pusle), 44 (lift bank lean condtion).
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