× 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 1, 2011
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
2001 Cadillac Seville SLS 4.6L Intermitt Nostart VIN: Y11U250960
vehicule intermittantly will not start, the controll wire for the starter relay will not ground. tested at the pcm found power coming from the ignition switch to crank but no ground signal coming out of the pcm, there is no security light on and no security co...
1969 Chevrolet Corvette 5.7L Retractable panel VIN: 194679S715
We got this vehicle after another shop worked on it. What I need is a schematic diagram for the vacuum that operates the retractible panel that covers the wiper arms. Also I need the vacuum schematic for the head lights. If you have them please fax the to 619-...
1995 Chevrolet Corsica 2.2L No Communication VIN: 1G1LD5540S
this corsica will not communicate with our modis, and will not flash code 12. I can't communicate with the ABS, ECM, or Airbag modules. I've disconnected each in turn and still cannot establish communication. Serial Data line (circuit 800, tan wire) is not sho...
1998 Chevrolet Tracker 1.6L Misfire VIN: 3CNBJ1868W
car came in running bad. found #4spark wire oil soak. changed valve cover gasket and plugs and wires. drove for two days. no check eng. lite or misfire. gave to customer did't even make very far po300. i got it back and kept driving and it set po304. wires are... Trouble codes: P0304
1999 Chevrolet Cavalier 2.2L turn signal fuse VIN: IGIJC5248X
it takes from one to two weeks for the fuse to blow. this is a 10 amp fuse,the car owner has tried a 20 amp fuse whith same results. we have checked all bulb sockets. wiring under battery,underseats. connectors at flaser look good wiring at turn signal switch ...
2004 Chevrolet Suburban 1500 LT 5.3L Check engine lite VIN: 1GNEC16Z04
Found code po441, emissions problem, but cannot find code in alldata. Alldata only gives me an option for flex fuel but this is not a flex fuel suburban. Needs to find problem for customer... Car is running fine but we keep having the same issue.
2007 Chevrolet Impala LS 3.5L shift lock VIN: 2G1WT58K97
Have a 2007 chev impala. Cannot shift from park with brake on. Will shift from park if the over ride is used. This is the first one I have had with this problem. Cannot find how this inter lock works in all data. With key on and foot on brake we have 12 volts ...
2009 Chevrolet Traverse LT 3.6L Hesitation, MIL Lamp on VIN: 1GNER23D89
I have a '09 Chevy Traverse with low miles on it with no warranty due to salvage vehicle. Setting code P0017 Exhaust cam performance bank 1. Wiring does not appear to be pinched or broken and my scan data shows no open or shorts. I can command solenoid on/off ... Trouble codes: P0017 (Ckp-exhaust camshaft position correlation bank 1)
1997 GMC C-Series Topkick C7H042 6.6L Tachometer
I have the cluster on my bench and have repaired several issues. I cannot make the tach deflect, though. I am inputing a square wave from 100 herzt up to 1000000 hertz, at up 25 volts with no deflection. this works on the majority of gas powered vehicle tachs ...
1997 GMC K2500 Suburban SLE 7.4L output sensor VIN: 3GKGK26J0V
The trans was rebuilt 8000 miles ago. After driving for about 5 miles it will default to third gear. It will shift from first to third,but really hard. It will not go into fourth. i can command 4th gear with the scanner while driving. There are no codes presen...
2002 GMC Yukon Denali 6.0L Misfire, MIL Lamp on VIN: 1GKEK63U62
Vehicle came in for a check engine light, found code p0300, scanned and found all cylinders had some misfiring. Checked spark plugs and they were due for replacement. Installed plugs with new wires. customer drove for a few daysw and returned with CEL back on.... Trouble codes: P0200, P0300, P0171, P0174
2003 GMC Yukon XL 1500 Denali 6.0L shocks VIN: 1GKFK66UX3
Wanted to know where i can buy replacement air ride control shocks, need all four. Has sensors on all 4 shocks.
1995 Oldsmobile Achieva S 3.1L Stall VIN: 1G3NL15MXS
Here is a good one. Customer states that after driving for a while, he'll park it to go into a store, come out and it will start and stall. Then start and run rough then it runs fine. And no, the fuel pressure regulator is no leaking and fuel pressure doesn't ...
2003 Pontiac Vibe 1.8L Air Bag Light VIN: 5Y2SL62883
Hello all, I admit to being a little weak on air bag systems, that being said, this vibe has the air bag light on all the time, customer says its been on for over 2 years. My Verus scan tool says no codes, but the light remains on, I dont think the Verus is wo...
2004 Pontiac Grand Prix GTP 3.8L Cuts out, MIL Lamp on VIN: 2G2WR52474
Car has codes PO651 & PO742. Baro & AC press sensors both have 5 volt reference. TCC release sensor will not release according to scanner.Unplug 10 pin at trans still shows not released.Also occasionally door locks lock & unlock when connecting & disconnecting... Trouble codes: P0651, P0742
2006 Pontiac Grand Prix 3.8L No Start, MIL Lamp on VIN: 2G2WP55216
This car came in with these two codes a month ago and we cleaned the throttle plate and MAF sensor, cleared the codes and away it went. Two weeks later it got towed in with the same codes and it would try to start and then stall. We found that there was a refl... Trouble codes: P0068 (Map maf sensor correlation), P0101 (Maf circuit range performance problem)
2005 Saturn Ion-1 2.2L MIL Lamp on VIN: 1G8AZ54F75
Car died while driving at steady speed. Then would not crank. Sat ten minutes then cranked and ran. Check engine light now on. Pulled code po601 control module read only memory. Saturn basically says replace ecm. Not so fast. I cleared code and lab scoped all ... Trouble codes: P0601

Fixes & Summaries for GM
Fix/Summary Answers
2000 Cadillac Eldorado ESC 4.6L MIL Lamp on VIN: 1G6ET1298Y
Thanks for everyone's help with this one. I ended up scoping all 3 sensors right at the ecm and found that after the vehicle ran for about 10 minutes, the cam sensor would occasionally flat line at 4.5 volts. I spoke with the customer and he opted to replace a... Trouble codes: P0340, P0341.
2001 Chevrolet Camaro 3.8L Eng /Trans VIN: 2G1FP22KX1
1999 GMC C 6500 454CID Valves VIN: 1GDJ6H1D0X
I very sorry for the delay in closing this post.Before the truck left the shop,the owner told me that they had just replaced the fuel filter before it came to me. Since they picked it up it has been running great.I did want to get it back in to check the inje...
1999 GMC Yukon Denali 5.7L evo/passlock VIN: 1GKEK13RXX
fixed! passlock sensor did take care of the problem, however i tried old passlock module and still samething as before. security light flashed for 3 seconds then shuts off and start and stall. I'm convinced someone jump started this thing wrong and spiked a bu...
1997 Pontiac Firebird Trans Am 5.7L No Start, Stall VIN: 2G2FV32P5V
Finally the Trans Am is fixed. Thanks to all the iatn tecs for answering my specific question about the injector driver issue. We installed a new ACDELCO Optispark Distributor, removing the old Accel one. Problem occured so infrequently it was difficult to com... Trouble codes: P0161.
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next