× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for March 2, 2006
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for GM
Help Request Answers
1998 Buick Park Avenue Ultra 3.8L entire vehicle VIN: 1G4CU5215W
this car had an idler pully that was grooved to the point of wearing on the drive belt to the supercharger. if you are familiar with this setup, it is the one that is behind the motor mount bracket on the front of the engine. as a maintenence repair we replace...
1997 Cadillac Seville STS 4.6L tcs activation VIN: 1G6KY5292V
cad techs need some help with the traction control system on this 97 seville sts, frequently but intermittently,the the traction control system activates for no reason - when taking off from a stop the system will activate & the low traction light will come on...
1998 Cadillac Catera 3.0L oil leak VIN: W06VR52R5W
Hi Guys, I hate to ask for information and this is only the second time for me doing so. I have this Catera that is leaking oil when running and running down the power steeringg pump, I thoughtit might be the V/c Gaskets for a moment until I saw this. The cust...
2000 Cadillac Seville STS 4.6L Starting VIN: 1G6KY549XY
This STS was toed in after my brother R&R'd the alternator to replace a bad bearing. Now it will not start and it has all kinds of bizar electrical including ignition staying on with key off and also DRLights staying on and fuel pump running steady. We tried a...
2002 Cadillac DeVille DHS 4.6L Steering Sensor VIN: 1G6KE54Y32
I have 2 trouble codes related to the steering sensor a : C1287 & C1288 Sensor is listed at being at the bottom of the steering collumn. Some points of interest list disabling the sir system in zone 3 and using a J42640 steering collumn lock pin tool inserte...
1985 Chevrolet S10 2.8L engine VIN: 1GCCS14B2F
We are trying to find the casting number, not the engine ID number, to determine the correct parts needed for this engine. For some reason there are 2 different 2.8L engines and this casting number is important in determining which engine we have. Can any one ...
1994 Chevrolet S10 2.2L Poor Idle Quality, Surge VIN: 1GCCS1444R
Hi everyone. I got this s10 that idles bad,and runs good off idle. Vacuum is low at 16 at idle and the blm numbers are 90 at idle. There is a rattle noise, cold from the front of the motor. Goes away warmed up or is not as bad.The egr has been replaced at anot...
1996 Chevrolet Lumina 3.1L ABSmodule VIN: 2G1WL52M7T
hey guys got this car with the abs light on history codes are C1234,C1276,C1278 current codes is C1234.EBCM ignition voltage is 14.6 volts,EBCM battery voltage is 2.5volts i am also getting 2.5 volts at the abs fuse i know there is a short somewhere but have a...
1998 Chevrolet Venture 3.4L Cuts out VIN: 1GNDXO3E9W
Good morning Techs, Venture van has turned into a technical adventure. It sounds and feels like it is going into a rev limiter at 3200 rpm. Shift tranny into low gear and at 3200 it will go into rev limiting and stay there until I manually shift to second. Rev...
1998 Chevrolet Corvette 5.7L Stall VIN: 1G1YY22G8W
Hello All, It's rare that I have to post a help request, usually I can find information here rather quickly. I have a corvette with a Service Column Lock message on the dash and it will die when trying to move it. Now I have read all kinds of posts about the l...
1998 Chevrolet Venture 3.4L Hyd. Brake System VIN: 1GNDX03EXW
Hey Guy's We did the rear wheel cyls and shoes on this one and went to bleed it and no fluid would come out. we removed the cover on the hyd. control unit and rehomed the the center gear on the unit and were able to bleed the system, but when we road tested th...
1998 Chevrolet K3500 Cheyenne 7.4L fuel guage VIN: 1GBJK34J6W
I Have this k3500 with dual fuel tanks. The customer would like to remove the rear tank so that he can put a spring loaded ag hitch in. The problem i am running into is making the fuel gauge work. With dual tanks there us a fuel balance module that the signal ...
1999 Chevrolet K3500 7.4L Hard start hot VIN: 1GBJK34J5X
HI This truck start hard hot after it has set about 15 min. starts fine cold or if you shut it off hot and start it right backup. fuel pressure dosen't leak down, has a intermittent 1351 has new delco fuel pump,ign module, and crank sensor. Sents we installed... Trouble codes: 1351 (ign coil control circuit high voltage)
2003 Chevrolet Silverado 1500 HD LS 6.0L loses power VIN: 1GCGC13U23
Occasionally-once a week- this Chevy will lose power, the driver pulls to the side of the road and can go 30 MPH or so. The check engine light comes on. He then shuts the engine off and restarts, this makes the vehicle runs normal until the problem re-occurs. ... Trouble codes: P1516 (Throttle Position out of Range)
2001 GMC Sonoma SLS 4.3L abs module VIN: 1GTDT13W11
hello everyone , hope you can help with this one . vehicle came in with abs light on and codes c0 225 , 226 , and 227 all refer to abs wheel speed sensors . pulled up diagnostic chart from alldata . found left front abs wheel speed sensor wiring broken at spee...
1990 Oldsmobile Cutlass Supreme SL 3.1L Misfire VIN: 1G3WS54TXL
I have this Olds in with a 3.1 DIS ignition system. I have no spark on two cylinders that share a common coil (3,6). I diagnosed it as a bad coil and apparently I was wrong. Put a new coil in and same thing. I guess it must be the ignition module (under the co...
1999 Pontiac Grand Am GT 3.4L MIL Lamp on VIN: 1G2NW52E2X
This vehicle will pop a code P0336 after the second ignition cycle every time it is cleared. Ran test, came down to bad 24x sensor. Replaced sensor, code comes back. Replaced again, code comes back. Then started throwing parts at it. Put in other crank sensor ... Trouble codes: P0336 (24x refence performance)
1999 Pontiac Grand Prix GTP 3.8L speedometer VIN: 1G2WR5214X
speedometer reads zero, car also has H U D it also reads zero. but with scanner shows speed working fine, replaced computor. any help would be great. thanks.
2000 Pontiac Grand Prix GT 3.8L Shift Lock System VIN: 1G2WP52K2Y
Had this vehicle come in previous with a sticking ignition cylinder, where the key cannot be removed. Did not want it changed. several months later, the shift lever sticks in park. It was possible to shift out of park, but difficult. I performed a shift lock c...
2001 Pontiac Grand Am SE 3.4L MIL Lamp on VIN: 1G2NF52E91
had ignition voltage on brown wire key on jumped brown and white wire key on no lite on test lite. unplugged harness at computer checked ohms from black white wire at harness and sensor plug at o2 have .3 ohms on 200 ohm scale my guess wire is good. TAKES LONG... Trouble codes: P0135
1999 Saturn SL 1.9L tachometer VIN: 1G8ZF5289X
Help Saturn techs. We are a asian repair shop and have been asked to help with this Saturn. When you first start car speedo needle sets at zero and vibarates very quickly, tach is inop. Rev up engine and speedo quits vibarating and tach starts working. When yo...

Fixes & Summaries for GM
Fix/Summary Answers
1989 Buick LeSabre Custom 3.8L Stall VIN: 1G4HP54CXK
Hello all, Fist I want to appologize for the delay in responding to this reply as soon as I opened this request I went down sick and spent three day in bed. And still had to come back to this heap! BUT,thank you everyone for the great responses most of you s...
2003 Buick Rendezvous CX 3.4L Rear Differential VIN: 3G5DB03E73
Fixed and delivered! Got very good replies from Bob, Robert, Stephan, Brian, and David all of which were very accurate and well thought out. Thanks much guys! The problem with this one was the pinon [and possibly ring gear] bearings which were causing the howl...
1995 Cadillac Seville SLS 4.6L a/c clutch VIN: 1G6KS52Y8S
Fellow techs, Customer has yet to return with vehicle. The consensus was that the vehicle is low on freon and that I need to invest in some guages if I'm going to troubleshoot a/c systems. Other replies suggested checking for a clogged orifice tube and one f...
1997 Chevrolet C1500 Cheyenne 5.0L timing chain VIN: 2GCEC19M2V
Ok thanks for your input. Alot of you guys said no (does not bend valves) and some said yes(it bends valves). Well this truck did not bend the valves although the chain alignment was out by about 7 teeth. The customer had some back-yarder install the chain bec...
1997 Chevrolet K1500 Cheyenne 5.7L Misfire VIN: 2GCEK19R0V
Thanks everyone for the great replies. After talking to the customer, I found that he had it in another shop for this same concern. They Motorvac'ed 3 times, replaced #6 injector, replaced plugs, wires, cap & rotor. replaced egr valve. Nothing helped. I scoped... Trouble codes: P0161, P0507 (Idle system hi Idle), P0306 (Cylinder 6 misfire detected).
1998 Chevrolet Lumina 3.1L Theft Deterrent VIN: 2G1WL5ZM1W
Thanks to all that responded. I hate when you get down to the point of having to buy an expensive electrical component in order to prove that your diagnosis is correct. I felt that I had checked and rechecked this system, looked for the common problems and rul...
1999 Chevrolet Tahoe 5.7L ABS Module, Speed sensor VIN: 1GNEK13ROX
I am going to close this post, because I really do not think it is an ABS problem. Also, the problem has not happened to me in 2 weeks of driving off and on. I did experience the problem once, before I posted. Right after that, I inspected the ECM connectors, ...
2000 Chevrolet S10 2.2L radio, service engine soon light. VIN: 1GCCS1452Y
Unpluging the bcm only stoped radio and air bag indicator illumination. What fixed the problem was to replace the ignition switch we hand just recently replaced. The switch would make contact when ambient temp was low and power up the fuse #5 and cause the pcm...
2003 Chevrolet Cavalier 2.2L speedometer VIN: 1G1JC52FX3
Thanks again to all who helped, I ended up talking the customer into going with a new unit from gm and they programmed it before they shipped it out and all I had to do was install it and it was ready to go. From the replies I got it sounds like this is a coom...
2004 Chevrolet Colorado 3.5L suspension
Well I just wanted to tell everyone that I have not seen this vehicle since the post, Ron commented that their shop has seen 3 of these vehicles with vibration problems so this one is not a special case, I will check to see if the u joint or driveshaft balance...
2000 GMC Jimmy Diamond Edition 4.3L HVAC /ABS Light VIN: 1GKDT13W5Y
Being that this vehicle is a wholesale piece the customer chose not to trak it any further. I suspect a bad VCM signal that is intermittently shut things down, but I won't get a chance to follw that lead down. Thanks for the replies. Paul
2002 GMC Savana 3500 5.7L rear wheels VIN: 1GDJG31R42
Thanks for your input. Suggestions included: torque properly; check wheel fit; check wheel and hub condition; do not carry overloads; contact Dorman; file a complaint with the NHTSB. All the trucks that sheared the studs off had had them all replaced in the co...
2001 Oldsmobile Aurora 4.0L Poor Idle Quality, Misfire VIN: 1G3GS64C01
this one is still acting up. i did receive suggestion to perform leak down test which was about the only thing i had not done. customer returned for further insp. and we contacted dealer for warranty info. vehichle still had warranty left so we sent it to the ...
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next