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Prev Professional Automotive Repair Technical Discussions for February 18, 2008
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Open Help Requests for GM
Help Request Answers
2005 Buick LeSabre Custom 3.8L No Start VIN: 1G1HR54KX5
car will not start after sitting overnight. Has spark and good fuel pressure. Once you get the car started it will run fine all day even when it gets cold only has problem after sitting all night. No engine codes. Coolant temp reading good. Theres a tsb we got...
1990 Chevrolet C1500 Cheyenne 4.3L No Start VIN: 1GCD14Z0LE
Howdy folks, I have a "ever since ya " one here this morning . I installed wheel cylinders on this thing last week . Truck has no fuel out of the 2 injectors . Has fuel pressure to the t body, spark is good ,truck runs with an alternative fuel source. I dont h...
1994 Chevrolet C2500 5.7L fuel system VIN: 1GCFC24H2R
The vehicle first stalled on the highway. Made it to shop and when attempted to turn over, negative start. Cranked but no start, the fuel pump is kicking on. But it doesnt appear that the fuel is making it to the TBI. Any help would be a help.
1995 Chevrolet C2500 6.5L Starting VIN: 1GCFC24S1S
This truck will start and run decent if I unplug the coolant temp sensor. Data is good on scanner if I plug in the CTS engine running.With CTS unplugged data shows -35 degs. I have 5V ref. on yellow wire and ground on the black. I have tried another A/C delco ...
1999 Chevrolet Malibu LS 3.1L MIL Lamp on VIN: 1G1NE52J6X
Vehicle came back 2 more times with same P0410 Code on each inspection air pump had some defect, the first one the brush holder assembly broke and the second one the fan blade itself came loose from the motor.Has anyone run into this issue with this part numbe... Trouble codes: P0410 (Secondary air injection system)
2000 Chevrolet Astro 4.3L Pinion shim VIN: 1GCDM19W2Y
Hi and thanks in advance for the help.I am trying to setup a rear pinion with the Gm kit.The Question i have is,What is the difference in the 7.5,7.5/8,and the 7.625 differentials as far as setup tools used.The local dealer is of no help on the subject.If i us...
2000 Chevrolet S10 4.3L No Start VIN: 1GCDT14W6Y
Vehicle came in on the hook for a no start. Checked for spark and it had none. Replaced coil and spark returned. checked and replaced fouled plugs. Still no start. Checked for injector pulse and had none. Did vtd relearn and got pulse. Still no start. Checked ...
2004 Chevrolet Cavalier LS 2.2L Poor Idle Quality VIN: 1G1JF52F24
This one came in with MIL on P0300 & P0172 present. Checked history misfire counts and all seemed to be close on all cylinders. Vacuum @ idle 10 hg. Smoked intake and little seepage out throttle valve - but no other vacuum leaks. Checked compression 160 all cy... Trouble codes: P0300 (Random misfire), P0172 (Rich exhaust)
1997 GMC Yukon SL 5.7L belt / pulley VIN: 1GKEK13ROX
This sounds like it should be a easy fix but I'm not making any headway. Everything replaced except ps pump and tensioner spring assy. If you saturate belt noise will go away for about 2 minutes. 3 belts have been installed same thing. Balancer was replaced ab...
2006 GMC Envoy XL Denali 5.3L fuel guage VIN: 1GKET66M06
fuel guage reads empty all the time with a code p0463. i have very little info on this . was checking to see if there is and commin problems or if the there is a problem with the fuel sending unit. Any help would be great thanks
2000 Oldsmobile Bravada 4.3L all wheel drive light VIN: 1GH8T13W7Y
This AWD Smarttrack Bravada will blow the ATC fuse fuse and then the awd light comes on. Install fuse and then it is ok for several miles then reoccurs. With fuse blown, no communication with our scanner. With good fuse, comunication is fine. It is engaged in ...
1996 Pontiac Grand Am SE 2.4L starter engages VIN: 1G2NE52T5T
Hello group. Vehicle came to us with starter totally engaged while running. Thought starter was shorted. Removed starter, bendix ruined, teeth all chewed. We replaced starter, still would engage and ignition tumbler felt strange, loose feel. We replaced igniti...
1997 Pontiac Grand Prix GTP 3.8L No Start, Poor Idle Quality VIN: 1G2WP5211V
Customer brought vehicle in and said it would not start at times,after it had a hot soak, if he lets it sit for 30 minutes it would start. Some times it would run bad for a while then it would be fine. We got it to act up one time the first day it was here. Al...
1999 Pontiac Grand Am SE 2.4L Misfire, MIL Lamp on VIN: 1G2NE52T7X
MIL on, misfire/buck under heavy load. Misfire code stored for cylinder #4 but misfire counters show #2 is missing when we experience it. Feels like an ignition misfire problem but have good spark out of each coil 30+K (coils, housing and plugs replaced a few ...
2000 Pontiac Grand Prix GTP 3.8L MIL Lamp on VIN: 1G2WR5211Y
3.8 Supercharged system, runs -22% (rich) all the way across the board, including idle and loaded. If you reset fuel trims with tech 2 it will inch it's way down to -22% rather quickly. Checked mass air reading (cleaned it also), appears appropriate. If I indu...
2001 Pontiac Grand Am SE 2.4L Misfire VIN: 1G2NF52T71
Hello all, I'm reposting this vehicle because it is still having the same issue. This is the second time back since my first posting. Last time I replaced the plugs with AC Delco ones and also replaced both ignition coils. It has been less than 2k miles and it... Trouble codes: P0300 (random cylinder misfire)

Fixes & Summaries for GM
Fix/Summary Answers
2001 Buick LeSabre Limited 3.8L ABS Module VIN: 1G4HR54K71
First, Thanks to Michel [...] for their tips. Here is what we did this last time. After rescanning with 2 different scan tools to confirm the code, we unplugged the RR wheel speed sensor and then the L...
2007 Buick Lucerne CXL 3.8L steering column VIN: 1G4HD572X7
Sorry for the delayed fix. Thank you for all of your replies and advice regarding this matter. My father was highly appreciative for everyone taking time out of their day to give him a hand. He took the car to the dealership and they replaced the I Shaft un...
2004 Cadillac Escalade ESV 6.0L front end noise VIN: 3GYFK66N64
Thanks to all who helped, the front differential was the culprit. The carrier bearings were faulty, causing the noise decided to rebuild entire diff since metal has been running through it for a while. I think the wide oversize tires along with being AWD cause...
1996 Chevrolet Lumina 3.1L Shifter VIN: 2G1WL52M6T
First off I would like to thank all 6 of you who took the time to answer my request. Ted from Michigan and Pete from Florida hit the nail on the head on this one. The park pawl actuator rod was the culprit. The end of the spring loaded pawl cone was jammed on...
1996 Chevrolet Lumina LS 3.4L Poor Idle Quality, Surge, Cuts out, Stall VIN: 2G1WN52X2T
Sorry it took so long for me to send in this close thank you all for the help. It turned out to be a bad o2 sensor that was causing the problem. Trouble codes: P1642, P1441, P1401, P0441, P0300, P0135.
1999 Chevrolet Silverado 1500 4.3L Hesitation, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GCEC14W8X
I greatly appreciate all the replies. Unfortunately I have only had limited time to work on the vehicle due to the customer not being available and in no hurry for the repair. I will post more information when and if the customer decides to come back. Trouble codes: P0300 (random misfire), P0122 (TPS/Pedal position sensor A low voltage).
2000 Chevrolet Astro 4.3L fuel gauge VIN: 1GBDM19WXY
1998 GMC Jimmy Envoy 4.3L Fuel Gauge VIN: 1GKDT13WXW
This one is fixed and down the road. Found the wire harness rubbing on the front drive shaft, and it was kind of hard to see that until you actually stuck your head right up there in front of it. The one ground wire was broke, repaired the wire and the ga...
2002 GMC Yukon XL 2500 SLE 6.0L glass latch ajar switch VIN: 3GKGK26U52
Well, today is close out day. I have not gotten this car back in the door but I want to thank you guys for responding. No, it is not fixed but this post ran out of time, sorry guys. Thank you again Sean Blanchard ASE certified technician
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