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Prev Professional Automotive Repair Technical Discussions for January 15, 2009
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Open Help Requests for GM
Help Request Answers
1995 Chevrolet Cavalier LS 2.3L Excessive Emissions, Misfire VIN: 1G1JF32D3S
missing in overdrive between 45-50mph, only. came in for missfiring 3 weeks ago and replaced all ign. components dealer parts.. now car has returned. modis says missing on #2 and #4 only in overdrive at 45-50 then nothing has anyone seen this before.. tryed sw...
2001 Chevrolet Blazer LS 4.3L Unknown VIN: 1GNDT13W21
help!! I have a low brake pedal on this blazer, when running. we have replaced booster, master, abs pump, front pads and calipers, and have bled the system many many many times. have even activated abs many times and then bled some more. no external leaks. the...
2001 Chevrolet Impala 3.4L MIL Lamp on VIN: 2G1WF55EX1
The vehicle came back with an O2 sensor heater code, 3x reference code, egr code, and transmission adaptive limit. We replaced the O2 sensor, replaced the connector for the egr valve and those problems are fixed but the P1374 continues to come right back. I re... Trouble codes: P1374 (3x reference error)
2002 Chevrolet Impala 3.4L Cuts out, Bucking VIN: 2G1WF52E42
The problem has been around before the crank pulley or tune up was performed. The Car will occasionally buck(feels like ignition dropout)for one to four times under load in first or second. It will occasionally leave a misfire or two in the misfire data(differ...
2003 Chevrolet Silverado 3500 8.1L No shift, No communication w/TCM VIN: 1GCJK39GX3
This one was brought to me from a trans shop. No shift. No PRNL reading on dash. Check engine light and ABS lights on. Found PCM codes P0802 - Engine torque signal ckt, P1571 - Traction control torque request ckt, ABS code c0055 - VSS ckt, Transfer case code U...
1993 GMC Vandura P3500 5.7L Hesitation, Cuts out, Stall
This is a tow vehicle for customers race car. He blew the engine a few months ago and installed a new crate engine from Kragan. At the same time he replaced the MAP, TPS, EGR, and CTS. He also installed a new factory Distributor and fuel filter. Engine starts ...
1995 Oldsmobile Aurora 4.0L dash lights VIN: 1G3GR62C5S
Customer complains of the dash lights intermintantly illuminating. primarily the abs and brake lights as well as the audible brake warning indicatior. This customer had been to me in the past and would be fine for months at a time. Now it's at a point ware it ...
1997 Oldsmobile Achieva S 2.4L Security system VIN: 1G3NL52T7V
This is the first passlock system we have attempted to fix. Car came 3 weeks ago, no start, code B1026. Performed relearn (10 min key on) and car started no problem. Car came back 1 week later, no start, code B1026 (Bad vtd timinig 3 times). Followed flow char...
2000 Pontiac Montana 3.4L heater VIN: 1GMDX03E2Y
Not sure where to place this post,so here goes... Thanks in advance for all assistance.This Montana came to us for a poor heat complaint.Coolant level and condition were OK,and the engine temp was consistent on initial test drive as per Snap On scanner.Heat ...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick LeSabre Custom 3.8L No Start VIN: IG4HR52K3V
Thanks to all that replied. Most of the replies mentioned a leaky fuel pressure regulator or a fuel pressure issue. Both of those were ok. The problem ended up being the crank sensor. Sorry it took so long to post the fix. I was gone for a few we...
2000 Buick Century Custom 3.1L Problem filling tank VIN: 2G4WS52J81
Overwhelming response was for lack of venting of gas tank. checked the vent valve and it was ok. We pulled tank again, (3rd time, had a defective sender first time) and checked all valves, etc. --- NTF. Reassm, still wouldn't take gas. Had gas in vapor can, dr...
2002 Buick LeSabre Custom 3.8L Blower Motor
Hi all, BIGGIE THANKS TO ALL OF YOU! After reading all of the replies I had the encouragement to proceed. It was indeed possible to do without removing the Case. Following the advice of some of you, I pulled the Carpet and Padding out of the way. Was able ...
1987 Chevrolet R30 Scottsdale 7.4L low pedal VIN: 1GBHR34N6H
hi guys thanks for all the responses but all areas that were recommended have been done prior to post have no real information to post so i am going to close this thanks again!!!
1994 Chevrolet Lumina Z34 3.4L spark plug VIN: 2G1WP14X2R
Well I've got this one fixed. Thanks to all of you who responded. I called some local jobbers and 1 was able to help. Kit I bought was Perma-Plug brand and cost $22.00. It had 3 different length inserts, the special tap, and a swedging tool. I greased the tap ...
1998 Chevrolet K1500 Cheyenne 5.7L Hesitation, Cuts out VIN: 2GCEK19R9W
I would like to thank all of the people that responded to my cry for help. It turns out to be the ignition switch. I tryed to catch the problem with my scope, but unable to because it was so intermittent. I took a chance and replaced the ignition switch as man...
2002 Chevrolet Monte Carlo SS 3.8L brakes VIN: 2G1WX15K32
sorry it took so long to close this request but my customer has not come back yet.I feel it is going to be a front end problem that I missed since new rotors made no differance. I will repost when she comes back in
2003 Chevrolet Venture LS 3.4L awd VIN: 1GNDVO3E23
Thanks for the help everyone. The tech went back over everything and found the rear to be low on fluid. One of you ( I think Lloyd ) said about the rear not having a ring and pinion but something like a pump. That makes perfect sense now. Not enough fluid to p...
2003 Chevrolet Silverado 2500 6.0L Misfire, MIL Lamp on VIN: 1GCHK23U53
I want to thank all that took time to respond to my question, and as most of you said it was a plugged right bank catalytic converter, the vehicle is just within the 8 year 80,000 mile warranty so I am sending him to the dealer for warranty replacement. Other... Trouble codes: P0300 (Random Misfire), P0101.
2004 Chevrolet Monte Carlo SS 3.8L brake pedal VIN: 2G1WX12KX4
You guys where exactly right the material was broke off the backing plate of the pad roll back and the pad material would be in the right spot and have brakes roll forward and sometimes the material would move away from the pad and it would wish the piston was...
1999 GMC Yukon Denali 5.7L Back Up Lights & Instrument Lights VIN: 1GKEK13R2X
First I would like to apoligize for taking so long to close this request. Seems with the holidays and everything I just fall further behind. The problem with this vehicle was a poorly installed 4 prong trailer plug that was shoved up on the frame and we failed...
2006 GMC Sierra 1500 SL 4.3L No Start VIN: 1GTEC14X06
The PCM was bad. The company had put a PCM from an identical truck but even with matching numbers the program wont let it run. A new PCM reflashed did the trick
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