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Prev Professional Automotive Repair Technical Discussions for October 8, 2010
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Open Help Requests for GM
Help Request Answers
1998 Buick Park Avenue 3.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G4CW52K4W
Thanks in advance guys, I'm an import guy, GM's are new to me. It was towed in, no start. Codes P0172 Bank 1 rich and P0300 Random misfire. The front bank was fuel fouled. After drying off and adding oil it started. Now has a misfire on #3 all the time and int... Trouble codes: P0172, P0300
2004 Buick Park Avenue Ultra 3.8L 2-1 coast down shift VIN: 1G4CU54164
The 2-1 coast down shift is brutal in the morning, seems to get better when tranny temp is above 160f. Scan with Tech 2 no codes all sensors within specs. In the last 3 mph of coast down the EPC amperage drops to .12 and pressure increases to 190-210 psi and 2...
1992 Cadillac DeVille 4.9L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on
Hope one of you upstanding Technicians out there can help me out with this turd. Customer request tune up.Plugs and wires not original (car quest) have been replaced before. they're not new by any means, however i sprayed with H2O and no difference while runni... Trouble codes: 47 (BCM-ECM Data Problem)
1998 Chevrolet Astro 4.3L Mechanical VIN: 1GBDM19W6W
hi evry one, my problem is that hot the engine starts making a timing knocking noise or ( pinging)only under ligh loud and havy loud when is cold it does not, has good fuel pressure, fuel trims under loud and light loud are at zero, knock sensor nwas replace, ...
2005 Chevrolet Silverado 2500 HD 6.6L fuel gauge VIN: 1GCHK232X5
The fuel gauge works sometimes, before the sending unit was put in gauge never worked. Now the gauge will work only sometimes, and only with key cycles.
2005 Chevrolet Express 2500 4.8L oil pressure VIN: 1GCGG25V65
Hello, I am hoping someone who works on a lot of GM trucks might read this. Maybe a fleet or GM heavy line tech. This van has a 4.8 and I have seen a few 5.3s with the same issue. This is a one owner van that has had oil changes done on time since new and does...
2008 Chevrolet Express 1500 4.3L Vent VIN: 1GCFG15X78
Driver for dry cleaners has complained about shift issues. Fluid leaking from vent tube hose attached to cross-member. Added 1 quart of transmission fluid. No TSB, just one that keeps popping up for a 4T65E FWD transmission for leak from vent tube. I couldn't...
2003 GMC Yukon Denali 6.0L traction control VIN: 1GKEK63U73
please help. replaced rf wheel speed sensor and it ground off face of sensor, compared new sensor to old (original one) and the new sensor is longer. replaced the LH front sensor also but it was the same as the new sensor. the shorter (original) sensor for the...
2003 GMC Sierra 3500 6.6L Shift VIN: 1GTJK331X3
Truck has 4th gear only, pressures electrical connectors ok

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Regal GS 3.8L Cuts out, Stall VIN: 2G4WF5211W
Thanks for all who replied. Most of you were correct. It was the crank sensor. The car finally got to a point where it would not restart after it stalled and thats when I was able to get my Verus hooked up and found no rpm signal. Thanks again.
1997 Cadillac Seville SLS 4.6L rack & pinion VIN: 1G6KS52Y5V
well this is fixed and down the road. got 15 replies all agreed to change the rack and inspect steering shaft u-joints. i had check the u-joints prior to posting but forgot to mention in post. changed the rack bled system and aligned car drives and steers as i...
2002 Cadillac Escalade EXT 6.0L yaw /accellerometer sensor VIN: 3GYEK63N12
Thanks to all, it was a short to ground, the yaw sensor rate wire, the BRN/WHT wire. Ran new wire rather than taking the whole dash out.
1993 Chevrolet Lumina APV 3.8L Computer VIN: 1GNDU06L3R
We had not checked the 2nd fuse box, found blown fuse, replaced and intergraters started working. Hired hand is blind!!! HaHa Thank you so much for your help.
2003 Chevrolet Impala 3.4L front end VIN: 2G1WF52E53
Several people suggested it was a bad starter drive hitting the flywheel. That was the problem. Starter drive was sliding over into the flywheel when the vehicle turned right. Thanks to all.
2003 Chevrolet Impala 3.4L engine VIN: 2G1WF52E83
Thanks everyone for the help. We finally got a good bcm and took to the dealer and reprogrammed. Cranks fine now.
2003 Chevrolet Suburban 1500 LS 5.3L output shaft seals VIN: 3GNFK16Z03
The output shafts had minor corrosion at the sealing points, on both sides (pass side worse) and the bearing on the driver was just a little loose. I don't know if that was the trouble or not. My technician did not put any sealer around the outside of the se...
2003 Chevrolet Silverado 2500 HD 6.0L abs VIN: 1GCHC23114
Thanks so much guys, The truck is fixed, it took both wheel bearings. Luckily these came with sensors. A little pricey but worth it in the long run. We tried to change just one bearing at a time and it got a little better but not quite right. We also didn't ...
2006 Chevrolet Tahoe LT 5.3L No Start, Stall, MIL Lamp on VIN: 1GNEC13Z56
After much testing of all the circuit I could test I found the ABS module had a short in it, Unhooked the ABS and I ordered and replace the PCM and programmed it, After all testing it was doing good and then we hooked the ABS module back up and after 3 days al... Trouble codes: P0606.
2003 Oldsmobile Alero GL 2.2L MIL Lamp on VIN: 1G3NK52F93
I have used the test procedures and ideas that everyone was nice enough to send me. Unfortunately I have not completely pinpointed the problem. All the testing and repairs that I have performed have helped, but I believe there is still a hidden problem in this...
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