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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 8, 2010
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Open Help Requests for GM
Help Request Answers
1997 Buick Skylark Custom 3.1L Oil Pump VIN: 1G4NJ52M9V
Hello fellow techs. This car came in originally with a missfire and noisy lifters. I assumed that the lifters were not getting oil because of sludge buildup and in turn causing the missfire to occur. I added and can of engine flush and let the engine idle fo...
2003 Buick LeSabre Limited 3.8L Rear shocks VIN: 1G4HP52K83
Ok thanks for helping me out with this one. This is my first attempt at using IATN so be patient lol. I have a clunk coming from the rear shocks on this lasabra. It has air shocks where the strut and air ride are one peice. The customer came in and asked if we...
1978 Chevrolet Corvette 5.7L hyd. lines VIN: 1Z87485422
Hello all, I have a 78 vette that we put a mstr cyl on, bled the system, gravity and manual. i am getting clear fluid from all 4 calipers, no air. pedal builds good pressure when not running, or when running with the vacuum line disconnected from the booster. ...
1989 Chevrolet S10 2.5L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, MIL Lamp on VIN: 1GCBS14E5K
The vehicle runs much better when I created a vacuum leak by unplugging the MAP. PCM shows 25 in/hg with MAP vacuum unplugged. Engine vacuum at idle is 18-20 in/hg, but PCM only shows 9 in/hg with MAP plugged in. The truck is hard to start, hesitates when the ... Trouble codes: 33 (MAP Sensor Circuit Signal Voltage High)
1997 Chevrolet S10 4.3L battery draw VIN: 1GCDT19X2V
Can any one help with this S-10? It has a battery draw and I have found the draw when I remove one wire from the battery junction box.There are 5 studs on the battery junction box and if I take the one wire that is the second stud from the front of truck there...
2003 Chevrolet Impala 3.8L No Start VIN: 2G1WH52K33
Hello techs. Got another problem on a gm. This one got towed in. No start no crank. Security light, service vehicle soon, flash on message to right of cluster. Back and forth with key on. Airbag light will flash then stay on. Abs light never comes on. Only bra...
2004 GMC Envoy SLE 4.2L Brakes VIN: 1GKDT13S94
This vehicle is driven daily by my wife. This problem surfaced a couple of years back but only happened every once in a while, maybe not more than a couple times in a year. Within the last couple weeks it has progressed to happening nearly every time you drive...

Fixes & Summaries for GM
Fix/Summary Answers
2005 Cadillac STS 3.6L No Start VIN: 1G6DW67725
well i got 5 replies all saying this can happen if car is putted around town. talking with customer this car hasn't gone over 40 mph all summer. told customer to take the out once in a while and strech it's legs. customer said will do so. thanx for replies.
1998 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 1G13C5246W
Well i hope this makes sense to somebody.Ikept checking until i found that the fuse in the ip fuse block named cls/pcm would do the same as taking the battery cable off.i could take it out with the switch on and it dod not change anything.i could take it out w... Trouble codes: 107 (map sensor).
2001 Chevrolet Silverado 1500 5.3L loud grinding noise VIN: 1ZGCEK19T7
well i had a few good tips on things to check but now when the wheather got colder here in wis. it quit making any noises. the custemer is going to trade it off while its not making any noise so i guess i will never know what was making that noise. i want to t...
2002 Chevrolet Silverado 2500 HD 6.0L Engine VIN: U92Z312184
The vehicle did not return after replacing both head gasket. When I replaced the broken valve spring last month I found that I reversed the gasket, they both sure looked alike. Before I removed the heads the second times, I did the chemical test and treached t...
2003 Chevrolet Trailblazer LT 4.2L pressure hose VIN: 1GNDS13S43
thanks for the advise. however i deduced that since it was only vibrating in drive that it could be a mount issue, even though the mounts werent torn or outwardly damaged. so i physicly pushed the engine towards the drivers side (unloading the compressed mou...
1998 GMC Savana 3500 6.5L Poor Idle Quality, Hesitation, Surge, Misfire, Poor Fuel Economy, Lags, won't Rev up VIN: 1GTHG35FXW
This was a nightmare but it is gone and running good according to the person who works for this company. I had to fix several problems all at once on this van 1. The fuel tank was going into a vacum. Thanks to Alex for a heads up on that one. I removed the cap... Trouble codes: P0266, P0275, P0284, P0301.
1998 GMC Savana 3500 6.5L No Start, Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1GTHG35FXW
This was a nightmare but it is gone and running good according to the person who works for this company. I had to fix several problems all at once on this van 1. The fuel tank was going into a vacum. Thanks to Alex for a heads up on that one. I removed the cap...
2002 Pontiac Grand Am SE 2.2L timing chain VIN: 1G2NE52F72
Hello, Thanks for all the replies! The shop manager finally listened to me and got me out of the nightmare and were installing a reman engine. it is an interference motor and if you have one with a broken chain, suspect bent valves/damaged pistons. thanks agai...
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