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Prev Professional Automotive Repair Technical Discussions for May 23, 2006
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Open Help Requests for GM
Help Request Answers
1993 Buick Skylark Custom 3.3L Poor Idle Quality, MIL Lamp on VIN: 1G4NM54NOP
We just recieved this buick into our shop yesterday for a mil light and rough running. Check vehicle and found that vehicle had recent tune up, pulled codes had code 26 and code for tps. checked the tps and voltage was not changing. Checked for a misfire and f... Trouble codes: 26
1997 Buick Skylark Limited 3.1L ABS module VIN: 1G4NJ52T6V
Customer's original complaint of popping noise and ABS light on. Found codes for right front speed sensor shorted to power. Replaced speed sensor and repaired wiring to right front speed sensor. Also replaced left front speed sensor. Replaced ABS unit with use...
2000 Buick LeSabre Custom 3.8L odometer VIN: 1G4HP54K3Y
instrument panel is digital. everything works but odometer.Odometer Reads error. Trip works.
1996 Cadillac DeVille 4.6L Misfire, MIL Lamp on VIN: 1B6KU1EY9T
We have a cad here that missfires when cold. The motor was just replaced because of a bad headgasket. The motor replacement was used with about 100K on it. Did not have this problem before motor replacement. Cylinders 2,4,6 and 8 are the only ones that miss on... Trouble codes: P0154, P0300
1995 Chevrolet Astro CL 4.3L unknown VIN: 1GNEL19W8S
Greetings Y'all! Gots me a doozy. This beastie likes to pull right during hard braking before ABS kicks in. It will vary in intensity depending on speed and how fast you hit the pedal (ie: round town, light braking, hardly noticeable. Highway with panic, Holy ...
1996 Chevrolet C1500 4.3L Misfire VIN: 1GBEC14W5T
customer has had this truck for over a year and has had this issue looked at at dealerships and other shops. it misfire on # 3 and 4 cylenders between 1800 to 3100 rpm . cylender #2 is now showing a miss at idle i have replaced wires, plugs, dist cap and rotor... Trouble codes: P0300 (multiple cylinder misfire)
1997 Chevrolet Express 1500 5.7L driver power window VIN: 1GNFG15R6V
This vehicle has been a number of time for a inop drivers power window. What we have found out is the auto down feature is not turning off when the window stops a lower limit and burns up the motor. We have replaced the switch, motor and regulator well over a ...
1998 Chevrolet Malibu 3.1L Suspension VIN: 1G1ND52M5W
Hi techs: got a weird problem with this malibu. when going over bumps I get a very bad rattle from the front of vehicle. I've already replaced the front struts, strut mounts and springs, the rear control arm bushings, anti-swaybar bushings and links and a brok...
1999 Chevrolet Lumina 3.1L Surge, Cuts out VIN: 2G1WL52M5X
this car acts like the rev limiter is active, or it just cuts out extremely bad, only and i mean only after it rains and the car sets 2 days. it can be in a monsoon and set all day, it will be fine. it will run fine in the rain. if it set over the weekend and ...
2000 Chevrolet Express 1500 5.7L Stall VIN: 1GBFG15R2Y
This van will stall at idle , runs good , no codes present .Throttle body is clean , PCV valve is good , no apparent vacume leaks , and idle quality is smooth.But once in a while it will stall out @ idle.Leaning toward an idle control valve, milage is 55K.I ch...
2000 Chevrolet Lumina 3.1L information
Over the years we have accumulated a number of OE GM parts. Does anyone know of a website we can go to for supercessions and applications? Or a service we can subscribe to? Or books we can purchase? We have tried a number of sites (gmpartsdirect, gmpartscenter...
2000 Chevrolet Astro 4.3L compressor VIN: 1GNDM19WXY
This truck came in with a rapid cycling clutch just like it was low on charge. We pulled out the old charge and refilled it. It was full at 3 lbs. It has rear air. While letting the a/c run the clutch stopped working. Checked the fuse's, the low pressure switc...
2001 Chevrolet Express 2500 5.7L wipers/blower/abs VIN: 1GCGG25R91
Hello all, I was wondering if you GM techs have ran across this before. I looked at a van today for a short time, The ABS fuse was blown, Wipers inoperative (fuse good), & blower motor not working (fuse good). I tried looking at several of the wiring harnesses...
1996 Oldsmobile Cutlass Ciera 3.1L No Start VIN: 1G3AJ55MST
This vehicle towed to shop with no start conditin. I check for fuel pressure it is fine. I checked for spark and injector pulse. Has injector pulse but no spark. Hooked up scanner no codes present checked for rpm signal , cam and 24x signal counts as you crank...
1999 Oldsmobile Silhouette Premiere 3.4L Hesitation, Surge, Cuts out, Stall VIN: 1GHDX03E5X
Need Help, Vech after Driving 10-15 Miles stalls, surges, dies. We first replaced water Pump due to leaking and water was geting on crank sensor, vech came back still stalling check fuel preasure found fuel pump below specs. replaced new pump & fuel filter. Ba... Trouble codes: P1107 (Map Sensor)
1999 Pontiac Grand Prix GT 3.8L engine VIN: 1G2WP12K9X
Customer stated that while driving home the car started to run bad, and as she continued to try and get home the vehicle started running worse until it finally died. When cranking it almost wants to try and start but not close. I am leaning towards the timing ...

Fixes & Summaries for GM
Fix/Summary Answers
1996 Buick LeSabre Custom 3.8L Heater Blower, Battery VIN: 1G4HP52K3T
Well I got the car back in today. I spent most of the day tracing wires. I had orignaly suspected the ignition switch because of the ign #2 wire haveing power. I unhooked the ignition switch harness and put the dvom to it. I found that the power was coming fro...
1998 Cadillac DeVille 4.6L gauges VIN: 1G6KD54Y8W
Well I got this car in this morning ( Tue 5-23-06 ). Talk about feeling like a dummy. I went to the owners book and set it for milage instead of instant. Fixed . Thanks to all who responded. I didn't have a clue. Our Chevy garage took over Caddy so maybe next ...
1947 Chevrolet coupe 235CID master cyl
Hi, first off , a BIG 'Thank-YOU' to all who replied, the bulk of replies were right on the money, that being that I needed a residual valve in EACH system, I was able to get these at Jeg's High Performance parts and also was able to reconfirm with their tech ...
1995 Chevrolet Astro CL 4.3L intake valve VIN: 1GNEL19WXS
Thanks to everyone that replied. What we ended up doing was sending the head back in and had a new valve installed and reground that port. We also warrantied the injector spider. P.S. we will not be using this machine shop again. He never did say exactly what ...
1998 Chevrolet S10 LS 2.2L No Start VIN: 1GCCS1947W
Thanks for all of the replies. I finally got to the point of pulling the harness, and found that someone had tapped into the crank sensor wires for some unknown reason, fixed that and the vehicle runs fine now. Trouble codes: P1626 (Theft code fixed with new lock cyl. and ignition switch).
1998 Chevrolet Corvette 5.7L Fuel Gauge VIN: 1G1YY22G7W
Gentlemen( and ladies too), I'm sorry I don't get to call this one fixed and I'll tell you why. One of my replies suggested to check WWW.CORVETTEFORUM.COM to see what problems other Corvette owners were having with their fuel gauges, so I passed this along t...
2000 Chevrolet Malibu 3.1L Mechanical VIN: 1G1ND52J3Y
sorry about the long delay on this one , iv'e try'd several thing's on this one try'd oil flush with a wynns chemical machine, previouly replaced lifter's and checked lifter lift and still make's noise ,body shop the car came in with the noise , and are not wi...
2001 Chevrolet S10 4.3L Starting System VIN: 1GCDT19W71
Various replies touched on the fact of the positive battery cable possibly loosing connection and/or the starter relay not sending power to the starter. Even though we replaced the ignition switch and he says that it acted up a few times since we were not able...
2001 Chevrolet S10 LS 4.3L plenum drain VIN: 1GCDT13W11
As always I got some good repllies on this. Some suggested work already done (read complete post). No fix found yet. Many suggested baffles in heater core to stop sloshing noise, not sure that is the cause of this one. I only get the noise after extended opera...
2003 Chevrolet Trailblazer LT 4.2L lack of power VIN: 1GNES16S13
thanks for all of the suggestions. i was unable to pinpoint problem but did find the screens in cam phase actuator was missing and replaced but failed to fix. thanks for all of the help!!
1993 GMC K2500 Sierra 5.7L drivablilty concern VIN: 1GTGK29K8P
again thanks to all that responed, finally found the problem and it seems that when this motor was rebuilt either someone installed the wrong cap on rod 1 and 4 (switched them) or did not have a clean enviroment for building engines. The ulimate damage took ou...
2002 GMC Envoy SLE 4.2L Transfercase VIN: 1GKDT13SX2
well four replied with the tccm needs to be changed and re program. not able to do this as dont handle reprogramming but instead sent to a dealer and have them fixed what the four of you said. as a friend customer , called me to inform me what they did. thanks...
2003 GMC Sierra 3500 6.0L Misfire VIN: 1GDJC34V23
Hi group, thanks for all respond. we find the problem on the GMC. this morning I pull the oil pan YES I saw the problem,the last two cam lobes and roller lifters were severly damaged due to the lack of lubrication,(but not bad enough to cause back fire or pop ... Trouble codes: P0300 (testing and results).
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