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Prev Professional Automotive Repair Technical Discussions for February 21, 2006
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Open Help Requests for GM
Help Request Answers
1989 Buick LeSabre Custom 3.8L Stall VIN: 1G4HP54CXK
Please help!?!?! This vehicle is realy getting the best of me will only die on a test drive and not re start will have to be pushed or towed back in. Origionally this vehicle came in for a no start module was keeping coil energized and a no spark condition. Re...
1994 Buick Regal Custom 3.8L brakes VIN: 2G4WB15L4R
vehicle has hard brake pedal, worse cold. acts as though no booster. If put vehicle into a hard ABS stop, will have normal braking until shut off vehicle & let sit for a few hours. Then when restart, concern is there again. replaced booster (2x) & still there....
1997 Buick Riviera 3.8L Steering VIN: 1G4GD2214T
This Riviera has a tight steering complaint. It seems to be worse to the right. Turning to the left is normal. We have disconnected the tie rod ends as a first response and the struts seemed very very tight so we replaced the strut mounts. Problem seems a litt...
1998 Buick Century Custom 3.1L long crank to start VIN: 2G4WS52M8W
Hello everyone i have a long crank time before it starts, its interment it will not do it all the time. It has a cam sensor code alll the time. I changed the cam sensor, but it did not help any. i removed the sensor and looked at the camshaft and it is not lik...
2000 Buick LeSabre Limited 3.8L suspension VIN: 1G4HR54K5Y
Customer complained of a "SNAP" noise when turning and when hitting bumps. Customer had hit a curb with the right front, but noise is comming from the left front. Have checked everyhing visible on the suspension, but nothing seem to get rid of the "snap" noise...
1995 Cadillac Seville SLS 4.6L Shifting and Engadgement VIN: 1G6KY52945
I am having a tough time with this car. It has been in and out for three weeks. The vehicle has very harsh engadgement, shifting and is clunking when cold and the SES lamp is on. When the vehicle warms up, the lamp goes out and vehicle operates normally. There...
1989 Chevrolet Corsica 2.8L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy VIN: 1G1LT51W4K
hello car came in customer complained running rough. Checked coil output at coils very good. Checked output at wires very good. Checked plugs they were new but very black running rich. So replaced plugs changed oil . Checked fuel pressure normal 35 to 45 . Che... Trouble codes: 45 (running rich)
1994 Chevrolet G30 Chevy Van 5.7L Poor Idle Quality, predetonation VIN: IGBJH32K5P
first time we saw this vehicle it had two plug wires on the exhaust manifold which were burnt.after completing a tuneup, the vehicle was fixxed.about two months went by before customer brought it back for knocking sound under load. it has a small misfire at id...
1995 Chevrolet Lumina LS 3.4L Poor Idle Quality, Hesitation, Surge, MIL Lamp on VIN: 2G1WN52X1S
Greeting! This is my co-worker's car with "SES" on. Pulled the code p1640 & p1650; Quad Driver A& B Error. I checked & make work Fan#2, which controlled by Quad A driver from computer connector. So I jumped to conclusion that computer has the problem. So we re... Trouble codes: 1640 (Quad Driver A Error), 1650 (Quad Driver B Error)
1996 Chevrolet Lumina 3.1L radiator VIN: 2G1WL52MXT
The main concern with this vehicle is that after a day of so of intown driving the temp gauge goes high and vehicle overheats. Customer always shuts engine down before it gets too overheated and calls me. One cooling fan (driverside) comes on at 225 degrees an...
1996 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC1246T
Hello to all, I have a no spark condition with this cavalier, 0 rpm on scanner, here's were it get weird, i checked for power and ground at crank and cam sensors and found only 11 volts(very dim test light)at the cks and 0 volts at the cms battery voltage is 1...
1998 Chevrolet Malibu 3.1L po401 VIN: 1G1ND52M8W
test drive after replaceing egr,code comes back.check all that i know im stuck Trouble codes: 401 (egr low flow)
2001 Chevrolet Impala 3.4L doesn't accelerate VIN: 2G1WF52E41
Customer brought this vehicle to us to have a lower intake manifold set installed. We replaced it with revised felpro gasket, and put plugs in the vehicle. It will not accelerate or takes a long time to do so. The car idles fine and will accelerate when there ...
2002 Chevrolet Tahoe LS 5.3L No Start, Stall VIN: 1GEC13292R
almmost same as be for cold weather no start good fuel pressure no spark this time backfire through intake every now and then. Has Died going down highway twice left set started next morn. drove to shop.Have changed crank, sensor same prob.whats next cam senso...
1999 GMC Savana 1500 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire VIN: 47W28E6545
hi all i have a van and i need some help i got this van from another tech and it's been there 5 months it would not run so he replaced plugs cap and rotor vehicle starts but stalls and falls on it's face no power. back fires found computer damaged and all swe...
1997 Pontiac Grand Am SE 2.4L Drive Axle VIN: 1G2NE12T1V
This is a new customer I picked up. She had a CV axle installed a week ago. The car immediately started making a clunking noise when put in gear, and while driving. And, the person has yet to come back to inspect why the vehicle is making the clunking noise. I...
1999 Pontiac Sunfire SE 2.2L starter VIN: 1G2JB1240X
Hello people. I have this 99 Sunfire that has an intermitted no crank condition. Client said she tryed to start engine and engine did not crank. All dash lights where on and wipers worked so it doesn't sound like a battery problem. Vehicle was towed to me and ...
2002 Saturn L200 2.2L Misfire VIN: 1G8JU54F82
Posting for a friend in another shop. This vehicle has a random missfire code for cyls 1 & 4. The vehicle had the same problem 700 miles ago and the tech replaced the coil pack and module for those cylinders. Vehicle came in today with exactly the same problem... Trouble codes: P00, 300 (Random Missfire)

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick LeSabre Custom 3.8L charging system VIN: 1G4HP52K4W
Sorry guys it took me so long to close. A little more information on my part may have been helpful. Customer first brought car in because on a cold start volt meter on dash would go into red zone on gauge. Red on this gauge starts at 16 volts. After 6-8 minute...
1995 Cadillac DeVille 4.9L blower fan motor VIN: 1G6KD52B9S
Thanks for the replys. Eric, thanks for the advice. I didn't realize that the car had to be running for the fan to come on. Thanks again
1993 Chevrolet Lumina Euro 3.1L Excessive Emissions VIN: 2G1WN54T9P
Thank you to all who took the time to reply to my cry for aid. While most of the replies had similar suggestions ranging from injector issues to vacuum to cat function, none proved to be the silver bullet needed to fix this fine piece of Detroit detritus. I re... Trouble codes: 43 (ESC module circuit - intermittant).
1997 Chevrolet Blazer 4.3L shift & tcc solenoid VIN: 1GNCT18W3V
Thanks to all who offered help. Those who told me to replace the ignition switch nailed the problem on the head. I didn't realize that the power to the trans fuse came from a seperate feed from the ignition switch. I hooked up a volt meter to the trans fuse an...
1997 Chevrolet Lumina 3.1L Unknown VIN: 2G1WL52M7V
As I stated in my original post, I had isolated the alt electrically by disconnecting the bat wire and the reg plug from the back of the alt. By removing one fuse at a time, I was able to determine that the bal of the draw was in the circuits protected by fuse...
1998 Chevrolet K1500 Cheyenne 5.7L Stall VIN: 2GCEK19R2W
Pulled and reinstalled the dist. Moved it one tooth and that fixed the problem. Thanks for the help everyone Patrick Trouble codes: P1345 (Not sure).
1998 Chevrolet C1500 Cheyenne 5.7L No Start VIN: 2GCEC19R7W
This truck is fixed, as several of you mentioned , the fuel pressure regulator was leaking. I replaced it and the fuel pressure maintains like it should. I had the cam retard set correctly and it has some fresh delco tune-up parts. Thanks for all of your help....
1998 Chevrolet Cavalier LS 2.4L horn VIN: 1G1JF52T4W
the fix was all the information ken [...] sent me explain everthing in detail and all the other informtion that was sent and fax to me . i dont know what i would do without itan thank you all hope i can help some day thank you all jim
1999 Chevrolet C2500 5.7L Starting VIN: 1GCGC24R6X
Thank you all for your help. I guess it is not possible to by-pass the computer so I recommended that the customer bring it in when it's acting up.
2000 Chevrolet S10 4.3L abs system VIN: 1GCDT19W9Y
hello, the customer had decided to try and fix this himself, what a mess. he finally brought it back to me on the hook because he wrecked one hub assy. and found out that they're not cheap. i have no idea what he was trying to do, but i don't think he had any ...
2001 Chevrolet Blazer LS 4.3L fan clutch VIN: 1GNDT13W51
thanks for all the help iant! almost all of the 20 replies suggested the same thing, that this is normal. gm document id# [...], provided by one of the responders, proved the point that the fans are noiser when first started in cold because the fluid i...
2001 Chevrolet Silverado 1500 HD LS 6.0L Drive-axles VIN: 1GCGK13UX2
Thanks for all the replies it was good just to hear that I was not the only one having problems removing this axle shaft. I decided to monitor the leak for now as one of the replies suggested and not to bother with it since it was not to excessive at this time...
1998 GMC Jimmy Envoy 4.3L vcm ebcm VIN: 1GKDT13WXW
The fix is that the VCM output to the EBCM is a digital wave form. The vss sends a signal to the VCM and it then sends a digital signal to the EBCM. It would be real simple fix if GM and perveyers of printed media in the form of flow charts simply stated that ...
2004 GMC Sierra 3500 SLE 6.6L front diff/t-case VIN: 1GTJK33124
Good day.Customer has yet to return.Had 4 replies stating to look at the tire sizes and measure all tires for rolling diameter,another for most current programming,and grounding issues.All look like great things to inspect if and when this guy gets back from t...
1996 Pontiac Grand Am GT 3.1L Stall VIN: 1G2NW12M4T
Thanks for all the help there was no codes in the IPC only a code 1629 allreardy replace passlock sensor.The problem was very intermitant we got it to mess up 1 time with tech II hooked up it lost comunication from PCM TO IPC so we got a IPC from salvage yard ... Trouble codes: 1629 (passlock cylinder).
2001 Pontiac Aztek 3.4L Battery VIN: 3G7DA03EXI
Thanks to all for the replies. This post is late because I sent the customer to the dealer after finding defective body control module (staying on). Since it had to be programmed by them anyway, I called in a favor at the GM dealer and they put one in for him.
1999 Saturn SL1 1.9L MIL Lamp on VIN: 1G8ZH5284X
Finally got the Saturn back in on Monday. Replaced the EGR, the ports were clean... Tail lights down the road. Thanks for everyones help Chas
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