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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 20, 2009
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Open Help Requests for GM
Help Request Answers
1993 Buick Park Avenue Ultra 3.8L keyless entry/twilight sentinnal VIN: 1G4CU5314P
Vehicle came in w/ keyless entry inop. System wouldnt go into program mode. Ran test and replaced RAC module. Also has twilight sentinal that never turns off unless turned off manually. Now keyless entry will go into program mode, but if vehicle sits for half ...
1996 Buick Century Custom 3.1L valve train VIN: 1G4AG55M8T
here we go 1996 buick 3.1 came in for intake gasket leak customer wanted valve job while had down . we sent out the heads they needed miled and couple valve seats shop supplied .020 shim gaskets put all back together started and test drove more i drove the noi...
1993 Cadillac Allante 4.6L Lighting VIN: 1G6V53391P
Well I have this Classic Caddilac its in good condition doesnt apperar to have been taken apart before I got to it but the guy who owns it has done some tinkering and even has the factory manual which is coming in handy . Now the problem is the instrument clus...
1993 Chevrolet Lumina 3.1L long crank to start VIN: 2G1WL54T4P
This just seems odd so I want to post it. This vehicle has a long crank to start cold after sitting for over 6 hours (seems worse when colder). There is no fuel pressure but I hear the pump prime. Have power at the relay and back at the pump connector. After c...
1995 Chevrolet Monte Carlo LS 3.1L Engine noise VIN: 2G1WW12M3S
I have a strange noise in this Monte Carlo right after it starts up. Sounds like a clunking noise, about 3 times and after that the engine sounds just fine. It's not the ABS module clicking noise. It doesn't clunk every start up, about 50% of the time.
1998 Chevrolet Express 3500 5.7L speedometer VIN: 1GCHG35R6W
Hi gang. Need a bit of help on this gm van. Came in with customer saying trans gives a jolt once in a while. They forgot to mention that the speedo is reading up to 25 before I'm out of my lot, & at 95-100 mph when actually going maybe 30 mph. Shifts are stack...
2000 Chevrolet Astro 4.3L Hesitation, Surge, Cuts out VIN: 1GMDM19W3Y
Vehicle came in with a problem when you accel hard it will hesitate and bog down runs pretty well normally. Fuel pressure 62 lbs tried to drive without map plugged in and wont go at all. Replaced the distributer and coil did find a coil issue with arcing somet...
2001 Chevrolet Cavalier 2.2L Hesitation, MIL Lamp on VIN: 3G1JC52481
I'm wondering if somebody out there can guide on how to address a p0122 code throtle position or accelerator pedal position circuit problem.It runs very smooth until the engine warms up,when the engine is hot transmission will not shift or if it shifts it will... Trouble codes: P0122
2004 Chevrolet Impala 3.4L rear defogger VIN: 2G1WF55K44
I have tested the rear defogger and this is what I have. I have 13 volts at terminal 87 on the rear defogger relay. When I first turn it on I have 13 volts at the rear glass for about 10 seconds then it goes to .29 volts. When this happens I still have 13 volt...
2000 GMC Jimmy SLT 4.3L brake lights VIN: 1GKDT13W0Y
This vehicle came in because the brake lights were staying on all of the time. I jumped the gun and replaced the brake light switch and then when that didnt work I got into the real problem. When the key is OFF the brake lights work correctly but with the key ...
2000 GMC Jimmy SLT 4.3L engine VIN: 1GKDT13WXY
While accelerating from a dead stop it sometimes makes a loud blowing sound like a sticking fan clutch, jet engine, high rpms, etc. Have replaced fan clutch, seemed to be gone, came back next day. Fathers vehicle, noise becoming more often, need fix asap, he i...
2004 GMC Envoy SLT 4.2L MIL Lamp on VIN: 1GKDT13S34
This one came by today with the MIL on. She said it stalled after she started it and when she restarted it the MIL was on and it ran fine. I ran through a All-Data diagnostic chart with my MODIS. It basically just had me check codes and communications with all... Trouble codes: P0606
1997 Pontiac Bonneville SE 3.8L power to systems VIN: 1G2HX52K4V
After a short warm up some electrical systems began to lose power. The car begins to run worse and then die. If one of the other systems affected is operated as the problem is occuring the power loss is worse, ex: If you feel the car starting to run worse and ...
2001 Pontiac Montana 3.4L abs VIN: 1GMDX13E31
this montana van came in and customer was complaining of a brake noise, rattling sound. we inspected brakes and found no problems. she also stated the problem has been there for several years. one day she came by and our technician drove with her and heard the...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick Park Avenue 3.8L Headlights VIN: 1G4CW5213R
Thanks for the replies, we used bba-reman.com in Mass, one day service, very reasonable, our customer has had his car for over a week now. It is working fine.
1995 Buick Regal 3.8L Surge VIN: 2G4WB52LXS
Thanks for all the suggestions. We tried several scanners on this vehicle (older ones that we had and borrowed a new Snap-On scanner from a different shop) all came up with the same codes. But all the codes were in the History Codes. We could not get it to gen... Trouble codes: P0113, P0118, P0123, P0140, P0341, P0502.
2004 Buick Park Avenue 3.8L Display & blower VIN: 1G4CW54K74
Fixed it. Got three excellent replies from Kevin, Gary, and Dave who confirmed that the price I was quoted was indeed correct for one of these units [new]. I had this unit rebuilt by Boulder Bros Module Repair in Medford Oregon [Contact: James Brickley @ 541...
1994 Cadillac DeVille Concours 4.6L No Start VIN: 1G6KF52Y4R
Turns out the jumper harness that runs across the top of the fuel tank and connects the vehicle harness to the fuel pump had poor pin tension and when you wiggled the connector the pump would run. Replaced the vehicle side connector and all is okay.
2003 Chevrolet Cavalier 2.2L Blower Motor VIN: 1G1JC52F63
Sorry for the long delay in updating. The customer was out of town and only recently returned my call. The fix was to remove the dash cover and clean the evaporator core as suggested. We also removed the foam because of deterioration. We cleaned the air du...
2001 GMC Savana 3500 5.7L Engine VIN: 1GDFG15X73
Thanks for all the replies, all of them were helpfull. I got a few of the pushrods from the engine and one side was broken off and the rod was bent pretty bad on them. What I have come to the conclusion of is it must have been at least partially my fault. I...
2003 GMC Yukon SLE 5.3L Computers VIN: 1GKEK13Z13
Lady came back and the a/c started working and some of her other problems disappeared. If it returns with the same symptoms I will unplug each module to see what is hindering bus communication, and ck for proper voltage at the dlc. thanks for the help.
1994 Pontiac Bonneville SE 3.8L cooling fans VIN: 1G2HX52L1R
Thanks for everyones input. Replaced the ECM and fans work normally. The scan data now matches the fan operation. Joe
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