× 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 July 22, 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
2002 Buick Regal LS 3.8L shifting VIN: 2G4WB55K72
hi i have a weird problem with a 4t65e. came in with a code p1887,replace the pressure manifold assembly. car was never test driven prior to repair. when put in gear will rev and bang into gear. checked epc voltage to line pressure and it was good. rebuilt tra...
1980 Cadillac DeVille 6.0L Starting VIN: 6D476A9133
car towed in broken tooth off ,of flywheel starter was making alot of noise. relaced everything and after numerous atempts shimming starter can't get it right. tryed couple different starters and messed with shims for about 2 hours. in this time broke a tooth ...
2005 Cadillac Escalade ESV 6.0L Heated seats VIN: 3GYFK66N35
This is my wifes truck. I have scanned it and it has no codes. Alldata does not give me much to work with. What happens is that the driver heated seat automatically turns on randomly. When it is bad you will turn it off but it will come back on after like ten ...
1994 Chevrolet C3500 Cheyenne 7.4L melting plug wire VIN: 1GBKC34N7R
Thanx in advance.we have this 94 chev c3500 that keeps melting number 1 spark plug wire at the plug boot.checked no exhaust leaks,no restricted exhaust,no vacuum leaks,eng compression all cyls around 155 psi.exhaust temp readings with infared thermometer are e...
1994 Chevrolet Cavalier RS 3.1L top VIN: 1GFJF34T0R
Thanks in advance for your help. I have a 1994 Z-24 convertible. The convertible top was very sluggish. I found a leak and repaired. Here is the problem. I dont know what fluid the convertible top pump take. alldata does not say. I called the dealer and they w...
1995 Chevrolet Blazer 4.3L Excessive Emissions VIN: 1GNDT13W4S
Hi Smog Tech (CA) and GM tech, we needed help on this Blazer Car came in with fail smog check high nox from another smog check station (gold shield). They replace new cat with aftermarket, they had car for 2 to 3 weeks and gave up. Now we got it, the smog read...
1996 Chevrolet C1500 Cheyenne 5.7L MIL Lamp on VIN: 2GCEC19R1T
hi everyone. i have a problem here with this truck that will not communicate with my smog machine. it will communicate with the scanner very well, no problems there. i checked the grounds at the data link connecter and they all check ok. i do not knbow what i ... Trouble codes: P0420 (cat efficiency low bank 1)
2001 Chevrolet Tracker 2.0L Cooling Systems VIN: 2CNBE13C61
the engine runs hot. if you just run it easy it will not run all the way hot but will be on the upper side of where it should be. if you run the vehicle pretty hard the temp will rise in relationship to how hard you push it. we have replaced the water pump and...
2003 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHK23143
The vehicle has an intermittant no start(mostly when warm)It cranks over but will not light off.When cecking data stream,I notice that with fuel rail pressure is 7 to 9 cranking it will not start.If it gets to 10 it will fire.The truck will usually do the 10 w...
2003 Chevrolet Trailblazer North Face 4.2L rear blower motor VIN: 1GNET16S93
The rear blower motor works for a few minutes after starting then quits working. I have tested the powers and grounds to the rear blower motor and ground is missing when it quits working. How do I test the control processor and the auxiliary control module?
2007 Chevrolet Tahoe LS 4.8L abs VIN: 1GNFC13C27
This system is new to me. I have a 2007 Tahoe setting C0040 RF Speed Sensor Circuit. The customer says he went and got new tires, no problems going in. When he left the Brake and ABS lights were on. The DIC says "Service Traction Control System" Alldata says ...
1999 GMC Jimmy SL 4.3L Number 4 cyl VIN: 1GKDT13W3X
I pulled codes and found P0304 and P0300. Misfire counts on scanner immediately rise. I checked the normal stuff(spark output, fuel pressure,and injector balance). All were acceptable. I then swapped plugs and wires, still no change, I performed a compression ...
2004 GMC Sierra 2500 HD SLE 6.6L power door locks and windows VIN: 1GTHK29274
hi people this is my own truck 04 duramax 2500hd power door locks and window dont work i check IATN and people said to replace door module and reprogram BCM so i sent it to the dealer i cant reprogram car here yet the dealer said they cant reprogram it because...
1994 Pontiac Bonneville SE 3.8L Hesitation VIN: 1G2HX52K9S
This post is for another tech in the shop. On cold startup, car has a hesitation/stumble, and immediately sets code P0341, cam/crank error. After warmup, runs good and will not reset code even if restarted warm. Timing chain with new cam sprocket magnet have b... Trouble codes: P0341
1997 Pontiac Grand Am SE 2.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G2NE52T5V
car came in for a misfire. the original code was the po300. knowing the history with these quad4s i pulled the coil housing down and found that the resistance was quit a bit different from one cylinder to another, so i recommended a new housing then recheck sy... Trouble codes: P1133 (02 sensor circuit insufficent activity), P0300
1996 Saturn SL2 1.9L readiness monitors VIN: 1G8ZK5277T
after getting this vehicle for starting problem and check engine light on,the customer called and asked me to get it an inspection sticker because it was way overdue.it had a p1406 code for egr pintle position circuit failure.after confirming the electronic eg...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Chevrolet K2500 Suburban LS 7.4L engine VIN: 3GNGK26J5V
Thanks for the help. As several members suggested when the timing marks are lined up, that is the camshaft dot is at 6:00 oclock (straight down) and the crankshaft dot is at 12:00 (straight up) the #6 cylinder is at TDC not cylinder #1. When this vehicle arriv...
1998 Chevrolet K1500 Cheyenne 5.7L Misfire VIN: 2GCEK19RXW
Thanks for all the help, checked intake manifold for leak and found it did. We removed it and the gasket was cracked in my problem cyl. The customer had it replaced 2 years ago , we replaced it with the updated fel-pro gasket. runs great. thanks again to every... Trouble codes: P0300, P0306.
2000 Chevrolet S10 2.2L Hesitation VIN: 1GCCS1957Y
Thanx for the replies,turns out that the issue was present before the engine was replaced. Seems that once again management dropped the ball on the communication with customer.After a couple of hours of intense testing of suspect sensors, we found that the o2 ...
2001 Chevrolet Malibu 3.1L Over Heating VIN: 1G1ND52J61
Yes Got it with help of you guyez... Dev from indiana, Dan from texas, Karl from Quebec was given me right point to go with. Here what was the problem:- As soon temp hit 100 deg c/212 deg f (Right DAN) water start shooting out of reservoir bottle due to cap...
2006 Chevrolet HHR LS 2.2L Suspension VIN: 3GNDA13D16
thank you very very much for the responces.sway bar fram bushings were the problem replaced them both ,all is quiet.also found by grabbing the fender and shake vehicle side to side you can see the bar moving in the brackets(takes another tech to look with a li...
1996 GMC Jimmy 4.3L Surge VIN: 1GKDT13W3T
Alright gentlemen, here is what happened. I didn't want to close this one until I talked to the vehicle owner at least a week after I released the truck. He called, and so far the Jimmy is working and no re-occurrence of the original complaint. Thanks to yo...
2001 GMC Savana 1500 4.3L MIL Lamp on VIN: 1GTFG15WX1
in futher testing I did a injetor balance test. dureing this test before checking each injetor the scan tool energises the fuel pump to pressure things up. what I found is that at radom times when the system was pressurizeing and when it came to rest before te... Trouble codes: 172 (fuel rich bank 1), 175 (fuel rich bank 2).
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next