× 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 October 27, 2010
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
2006 Buick Rendezvous CXL 3.6L hazard fuse VIN: 3G5DB03716
car came to shop with hazard fuse blown #40 in center console fuse box. replaced fuse, fuse seems to blow intermitantly when braking making a turn. We disconnected orange power wire from blue connector at brake switch, then drove car fuse did not blow. Reconne...
1990 Chevrolet Lumina Euro 3.1L Poor Idle Quality VIN: 2G1WN14TOL
runs 10 inch of vacum at idle bring up rpms about 300 vacuum is 17 inch idle bad runs ok down the road
1995 Chevrolet Impala SS 5.7L Flourescent display VIN: 1G1BL52P5S
Vehichle came in with the flourescent display inop in the middle of the IP. Gauge lights work, radio display works, and all other illumination works all with the dimmer switch . send IP off two times to the rebuilder...came back two times with the same problem...
1999 Chevrolet Silverado 1500 5.3L No Start VIN: 1GCEK19TOX
I have checked all the normal stuff. Spark ok,fuel psi 55 But have found the cranking Vacume to be ONLY 1hg. Compression is 185 seems kind of high but cant find any spec. Unbolted the exaust flanges pluged exaust is not the problem. Smoked the intake no leaks....
2004 Chevrolet Impala 3.8L 1st gear start VIN: 2G1WF55K84
Purchased this 9C1 from county auction with 138k. 4T65E Trans & fluid was clean, car has had regular service from county DOT. I have bought several cars from them and all have been well maintained prior to purchase. Problem is as follows; problem only happens ...
2004 Chevrolet Silverado 1500 5.3L speedometer VIN: 2GCEK19T94
This 04 chevy K-1500 the speedometer does not always work the needle stays at 0. It stared just acting up in the morning but after driving 5-10 miles it would start working. Then it got to were when it started to move at 60 mph it showed maybe 10 or 20. Now it...
2006 Chevrolet Colorado LS 2.8L starting VIN: 1GCDT13856
Customer brought truck in for a crank but no start condition, which I verified this morning. Security light was flashing, so I left the key on for 15mins, walked back out and fired the truck right up. I know I have a security problem, so I just need a little i...
2007 Chevrolet C4500 Kodiak C4E042 6.6L fan clutch VIN: 1GBE4V1917
can't get fan clutch to engage with a/c on have checked all relays and forced engine to heat up with a/c off and fan clutch does engage thanks for your help
2002 GMC Sierra 1500 Denali 6.0L Seal VIN: 1GKFK66U92
This one is starting to be a pain. I replaced the axle seal on the front housing for the rt side and somehow this thing still wants to leak. First I used a National seal, next I used a NAPA brand and after both times within a few weeks it starts seeping. At fi...
1994 Oldsmobile 88 Royale 3.8L Misfire VIN: 1G3HY521LR
The coil for #3 & #6 not working at idle, both other coils working, coil will start to work at high rpm's, igniton module and crank sensor have been replaced. Trouble codes: P0300
2002 Pontiac Grand Prix SE 3.8L Abs VIN: 1G2WP52K32
This vehicle came in due to an ABS light. When hooked up to the diagnostic computer to read codes, it is not holding codes but light is on. Read the readings with the speed sensors and left front and right rear are reading fine. The right front is reading when...
1999 Saturn SC2 1.9L engine VIN: 1G8ZY1274X
mornin techs,we have this little saturn that is using quite a bit of oil.smokes pretty bad when at op temp.dont smoke at all until 200 degrees.shes using a quart in about 300 mi.i was hoping the pcv valve was stuck open but no such luck.im thinking valve stem ...

Fixes & Summaries for GM
Fix/Summary Answers
2003 Cadillac CTS 3.2L MIL Lamp on VIN: 1G6DM57N73
Hello all! IATN technicians are great! I checked the wiring in the circuit, connections at the PCM. All were good. I told the customer I thought the problem was in the PCM. The customer decided to take the car to the Cadillac dealership. She said that they det... Trouble codes: P0161 (Oxygen sensor heater circuit b2s2 fault), P0160 (Low oxygen sensor activity b2s2).
2006 Cadillac Escalade 6.0L panic/theft deterrant VIN: 1GYEC63NX6
Thanks guys for the replies. Gary, I think you got it. As soon as I got the new key fob I was able to program it to the car. I left it sit all the rest of the day, and the alarm never went off. Customer took the car, and I have not heard from them yet, so h...
1987 Chevrolet Astro LT 4.3L radiator/ water pump VIN: 1GNDM15Z2H
Most felt that the radiator was not large enough for the application.This was also my first impression. I beleive this to be correct. We had a cool spell(65f to 75f)and I drove the van. The temperature stayed lower than 200f, sometimes bouncing off the electri...
1998 Chevrolet K1500 Silverado 4.3L steering VIN: 1GCEK19W7W
We believe the tires and tire pressure were the biggest contributor to the stiff steering. The new gear box and pump were both aftermarket parts, responses I received said to use OEM parts. The steering was improved with the new (reman) aftermarket parts, but ...
2002 Chevrolet Impala 3.4L turn signal VIN: 2G1WF52E02
sorry i did not get back so soon,it was hazard light switch ,after beating on the dash at the switch it would work ,hit again it would not,i am not saying this is the way to check it,but it worked.thanks to everybody.
2002 Chevrolet Trailblazer LT 4.2L axle VIN: 1GNDT13S72
thanks for all the replies. found that the transfer case module was asleep. With key off pulled the ATC 25 amp fuse for 30sec, reinstalled and turn key on. Used scan to to engage front axle and actuator work. According to TSB from GM, 2002 trailblazer need to ...
2004 Chevrolet Suburban 1500 LS 5.3L Aux HVAC Temp Actuator VIN: 3GNFK16Z94
Thanks for the reply William. I guess this stumped everyone because you were the only person to reply. I Kept the new warrantee AUX HVAC Control Module in because old module would not perform recalibration sweep on temp door actuator but new module would. I h...
2006 Chevrolet Cobalt LS 2.2L Electronic VIN: 1G1AK55F26
As I had said before THANK YOU for all who replied, 1 post did redirect me to the harness that had rubbed through in the cylinder head area (not just the filter area) but the problem was compounded by the local GM dealer programming the new TCM with wrong cali...
1995 GMC K2500 Sierra SL 5.7L Hesitation VIN: 1GTK2ZE500
THANK YOU TO EVERYONE WHO REPLIED!!! Man, I never expected so many replies. The problem in fact was the FUEL PUMP. I replaced it with an OE pump, and the problem was gone, with the fuel pressure gauge showing me 15-16psi (thats more than spec). Many of you sai...
2006 GMC Envoy XL SLE 4.2L MIL Lamp on VIN: 1GKET16SX6
Case closed... Thanks to all for the replies and it was the vent solenoid. I'll do more homework next time. Time for me to go help someone else to repay my debt to iatn members who helped me. Trouble codes: P0449 (Evap vent solenoid ckt.low).
2007 GMC Yukon XL 1500 Denali 6.2L rear defog VIN: 1GKFK63807
after 10 hours this one is done. i traced the short to the drivers sill plate. some one installed it not watching out for the harness bellow. the clip that retains the plate is metal creating the bridge for the two circuits. the pocket that retained the clip i...
1968 Pontiac Firebird 5.7L Front end, filler panel assembly VIN: 223378L110
Thanks for your replys, they all related where to get the information. We already had one manual but not the relevant info. We have sorted all the bits and assembled. Thanks again
2003 Pontiac Bonneville SLE 3.8L Tranny VIN: 1G2HY54K13
This Bonnie is fixed and gone and most of the replies were right. it was the torque converter. I put a remaned one in and installed it and noise is gone. every thing else in the tranny looked fine. THANKS AGAIN FOR THE SUPPORT!!
2006 Saturn Ion-2 2.2L MIL Lamp on VIN: 1G8AJ55F96
Sorry for the delay in responding to your fixes. After reviewing the suggestions it seems that the TSB referenced by several of you is a direct match to the symptoms we are seeing. I have recommended having the computer updated to the customer but they have de... Trouble codes: P0326 (Knock Sensor Performance).
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next