× 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 November 17, 2009
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
1990 Buick Reatta 3.8L No Start, Stall VIN: 1G4EC13CXL
This pos came in with customer saying wants to stall out while driving, but can keep it going if they drive with both feet. did experience it and felt like ignition going away. brought into shop and first thing noticed was the green goo coming out of the modul...
1998 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 1G1JC5240W
We have this 1998 Caviler that is kicking our buts. Intermittently sets TPS codes. PO121 and 122. When this happens the customer says the transmission shifts hard or bangs into gear. This has been going on for over a year now but has never given us a problem. ... Trouble codes: P0122, P0121
1999 Chevrolet Tahoe 5.7L Steering VIN: 1GNEK13R3X
I have a 1999 Chevy Tahoe that has the "Death Wobble". Around 45 mph after hitting a bump. The vehicle steering wheel shakes so bad, you have to pull over to regain control of the truck. I've checked the whole steering/suspension. I found very small play in th...
2000 Chevrolet Blazer LS 4.3L Misfire VIN: 1GNCT18WXY
vehicle missfires on heavy acceleration. very intermittant and seems to only misfire on cyl 4 and 3 Trouble codes: P0300, P0304
2003 Chevrolet Avalanche 1500 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNEK13T13
Complaint is missing at idle, with check engine light on & flashing @ times. Scan tested with tech2 & seen #8 misfiring bad under 1200 rpm, & #7 about 1/2 misfires of #8. All other cylinders ok. Spark is excellant to cylinders(tried 2 diff plugs, coil, wires e... Trouble codes: P0300
2005 Chevrolet Silverado 1500 HD 6.0L front drive axles VIN: UNKNOWNVIN
When driving the truck from 30 mph up to 80 mph, the 4wd actuator in the front differential slightly engages enough to cause a vibration and grinding noise in the front axle. If you slow down to about 5 mph, it will disengage and the noise will stop. Seems to ...
2006 Chevrolet Express 3500 LS 6.0L MIL Lamp on VIN: 1GBJG31257
i just started here at this new dalership and i accepted this veh. knowing the situation. the problem is very intermittant a very random. i repaired a chaffed gmlan ckt in the chassis harness along the frame just below the driver side A piller body mount. and ... Trouble codes: P150C, P2544
2008 Chevrolet Silverado 3500 HD LTZ 6.6L Tire size VIN: 1GCJK33668
Hi everyone, This customer has had some new oversized wheels and tires installed and needs someone to calibrate the speedometer. We have a J2534 flashing tool and were wondering if it is possible to change the tire size through GM Tis. If so could someone pl...
1995 Oldsmobile Cutlass Ciera 3.1L Poor Idle Quality VIN: 1G3AJ55M5S
We just installed a used engine in this olds. It runs graet on the highway but surges at idle after warmed up. We replaced the intake gaskets, thermosta, plugs and wires. The idle will surge from 550 to 800rpm. The fuel trim is st 128, lt 122 while its surgein... Trouble codes: 705 (PRNDL failure)
2004 Oldsmobile Alero GL 3.4L blower motor
We have replaced the blower motor and blower motor resistor 3 times in the last few years with delco parts and it is bad again. The 30 amp fuse for the high speed was blown and after replacing this it only has high speed. I was wondering if anyone has seen thi...
1999 Pontiac Grand Prix GT 3.8L wiper motor VIN: 1G2WP12R8X
I have a interrmitent inop condition concerning the blower motor, speeds 1 thru 4, the radio power, and the wiper motor / combination switch. I looked thru the archives here and after following simular diagnostic procedures I have come to a 85% conclusion the ...
2000 Saturn LS1 2.2L MIL Lamp on VIN: 1G8JU52FXY
Data is stuck at ~455mv running or not and plugged in or not. All wires ohmed out perfect. Customer had replaced O2 sensor and we replaced it again after replacing pcm with no change. This is a pretty plain and simple circuit and has us baffled. Thank you in a... Trouble codes: P0140 (B1S2 No activity)

Fixes & Summaries for GM
Fix/Summary Answers
1996 Cadillac Seville SLS 4.6L Excessive Emissions, No Start, Poor Idle Quality, Cuts out, Stall, Misfire VIN: 1G6KS52Y0T
Hi all and good Tuesday Evening to you. Well after receiving 8, maybe 9 helpful comments. I thank you. Today our local Father Joe's pick up this vehicle. Many thanks for suggestion of removing oil filler and looking into chain drives for oil flow, more fluid t... Trouble codes: P0307 (Cylinder 7 Misfire), P0741 (Torque converter clutch off), P1377 (Timing error), P1406 (EGR error).
2006 Cadillac Escalade EXT 6.0L seats VIN: 3GYEK62N06
When I hooked up the scanner (tech 2) again I realized that the seat module is (intelligent), and I could manually switch on the heaters for each seat. Even though they would only stay active for about 5 seconds each time I was able to confirm the circuits wer...
1993 Chevrolet K2500 Suburban 7.4L running fault VIN: 1GNGK26N5P
1997 Chevrolet Express 3500 5.7L 1-2 shift VIN: 1GCHG39RXV
General consensus was the clutch that activates for 2nd gear was weak or not holding. 2nd gear would work with manual 2nd because of band application. Trans had a warranty from salvage yard, so we replaced it and all is well. Thanks to all who responded. Tom...
1999 Chevrolet K1500 Suburban 5.7L no pull VIN: 1GNFK16R2X
Thanks to everyone that took the time to help in this matter. I feel dumb but when i removed pan i found that when it was installed by owner the pan got pushed against the filter and restricted the flow. Then the clutch material fell apart. Due to the time unt...
2000 Chevrolet Tahoe 5.3L premature ABS VIN: 1GNEK13T6Y
I finally fixed this truck! Thank you to everyone who replied. I am always impressed with the people on IATN. Specila shout out goes to Timothy and Wayne. Watching the isolation valve showed what was activating and when. Wayne also said to look at the rear sen...
2002 Chevrolet Avalanche 1500 5.3L ebcm VIN: 3GNEC13T52
After sending EBCM back twice to rebuilder with code "Pump Motor Shorted to Ground" we purchased and installed new GM module. All is good and vehicle been gone couple weeks and followed up with customer stating vehicle has no "Brake" or "Anti-lock Brake" light...
2002 Chevrolet Malibu 3.1L No Start VIN: 1G1ND52J22
i found that water from a/c hose was getting into 02 sensor wiring,and going back to e.c.m . installed bigger hose at a/c routed away from o2 sensor,cleaned connector at e.c.m, problem fix. i want thank everybody for the help Trouble codes: P0141, U1040.
2005 Chevrolet Tahoe LS 5.3L Charging VIN: 1GNEK13TX5
I am going to call it a fix, however, I am not altogether certain that we changed the way this charging system works. Most of you are stating that it is normal for this system to drop down to 13 volts in a fuel saving mode. Some of you mention the lights flic...
1998 Oldsmobile Intrigue 3.8L Rear Calipers VIN: 1G3WX52K3W
Thanks to those that replied. My son has not returned with the car to check what info I recieved, however the concensus is that I need to reset the ABS with a scanner to bleed the brakes. And if this doesn't work the ABS motor needs to be replaced. Hopef...
2002 Oldsmobile Intrigue GL 3.5L headlights, radio VIN: 1G3WS52H32
Customer will take to dealership, :( Checked all inputs, no pin switch in door hinge, replaced ignition switch, disconnected radio, pulled hair out, checked every input to BCM and suspect BCM needed. Thanks for the replies, when I find out what fixed this ...
2007 Saturn Vue 3.5L air bag VIN: 5GZCZ63477
thanks all of you guys for your help. however the customer didn't want to do the seat cushion/module. Decided to trade it in. thank you all and be blessed.
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next