× 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 17, 2008
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
2005 Buick Century Custom 3.1L security VIN: 2G4WS52J45
Help This car has been driving me nuts for a week now It has a interment no start It will just crank and crank I have fuel presher and spark and I get a inj pulse with a lab scope I have put a module on it and 3x crank sensor and this did not help I put new pl...
1994 Chevrolet S10 2.2L no power VIN: 1GCCS1449R
Customer said car has been running bad for about 1 year. Test drive shows poor power.Customer also stated he heard a rattling noise in exhaust that eventually stopped. Vehicle acts like cat convertor clogged. Tested vacumn at 2000 RPM for 2 minutes 20 in. No s... Trouble codes: 44 (Lean exhaust)
1995 Chevrolet C2500 Cheyenne 6.5L Hesitation, Cuts out, Stall VIN: 1GCGC29F8S
I assumed this would be a typical fuel injection driver module replacement on a 6.5L turbo diesel to cure a quitting problem and also a hiccup problem. So I went ahead and replaced it. I have yet to hear if the quitting problem is completely gone since it can ...
1999 Chevrolet Monte Carlo 3.8L No Start
we have no spark but injector pulse and fuel pressure. 2 different ign modules installed, good power and groud. good crank sensor ( 3x and 18x signal), cam sensor good (inj pulse sync through pcm only, not spark control). put new crank sensor in anyway, tone w... Trouble codes: P0440
2000 Chevrolet Silverado 2500 6.0L 6.0 to 5.3 swap VIN: 1GCFC24U8Y
The 6.0 in this truck is bad. The customer wants to replace it with a 5.3. I told him there can be lots of problems; He said he would get the whole used engine, wiring harness and PCM.. I see on the wiring diagram that will give trans problems because of diffe...
2001 Chevrolet Malibu 3.1L Poor Idle Quality VIN: 1G1ND52141
After finishing intake manifold job and road testing several miles-thought everthing was done until last acceleration the rpm's stuck at 2500.I pulled car over thinking the throttle cable or throttle body was stuck.I snapped the throttle several times and you ...
2002 Chevrolet Venture 3.4L Hesitation, Misfire VIN: 1GNDU03E02
this van has a hesistion,showing multiple misfires sometimes.when the van comes in no misfires show on current or history misfire data.I have only seen misfires once out of 5 times I have taken van out for test drives,misfires where on all [...]&5 had the...
2002 Chevrolet S10 4.3L electronic brake control module VIN: 1GCDT19W22
Truck came in customer stated dash lights all came on and shortly the went out. the only ones that remained on were ABS and Brake light. checked for codes and found above codes. Ran alldatas diagnostics and thinking the ebcm is faulty but wondering if any one ...
2003 Chevrolet Malibu LS 3.1L cruise control VIN: 1G1NE52J83
I have a 2003 chevy malibu with 61000 miles on it. The problem is that when you turn the cruise control on or off it makes a clunking noise from the right front corner of the car. It does not do this with just using the pedal and brakes so it rules out all but...
2006 Chevrolet Trailblazer LT 4.2L MIL Lamp on VIN: 1GNDT13S26
hello all good tech, i replaced the air pump relay and now the pump and air solenoid are both working but the mil keep coming back on with p2431.air pressure sensor show on mod but i couldn't find it.anyone know where it is located and what is the common probl... Trouble codes: P2431 (secondary air injection pressure sensor a crt)
2002 GMC Envoy SLE 4.2L Starting VIN: 1GKDT13S02
well this was supposed to be a simple one, i replaced the battery on this truck now the truck will not even crank over. all the dash lights come on the battery is fine and it sets a p1631 securty code when you crank it, has any one ever seen this. by the way i...
2000 Oldsmobile Alero GL 2.4L Misfire VIN: 1G3NL52T5Y
Good morning all, I'm having fun with one of these chevy 2.4l with the coil pack assembly cover pieces and guess what, a misfire. It was in last week for the same problem, a misfire under load, leading me to believe it was a weak spark issue. Once I got the ig... Trouble codes: P0301 (Misfire detected in cyl 1)
2000 Oldsmobile Bravada 4.3L Misfire VIN: 1GHDT13W4Y
hi guys, i'm fresh outta ideas here and any help will be greatly appreciated. original complaint was poor driveability on a test drive- when passing. read th crank code and replaced it. code has not returned after many more test drives. performed ckp relearn a...
2001 Pontiac Montana 3.4L MIL Lamp on VIN: 1G5839T452
po102 and p0440 were set 580km after the 02 were changed for mant wonder if it could be rlated or if anyone had other ideas what could be. Trouble codes: P0102
1999 Saturn SC2 1.9L Misfire VIN: 1G8ZH1271X
I am afraid I may look at this to hard. This customer has been to several differant shops including the dealer and keeps getting o different story. Now I am giving him another one. As stated before the injectors amp ramp at 1 amp per injector at the injector i... Trouble codes: P0302

Fixes & Summaries for GM
Fix/Summary Answers
2003 Buick LeSabre Custom 3.8L engine VIN: 1G4HP52KX3
Thanks to everyone who responded.After doing a few different tests i found the original ignition module to be faulty,so i replaced with a new one and we have a fix.Thanks again Andy
1996 Chevrolet Tahoe 5.7L seat
THANKS to the people that took time to reply to my help reqwest. i did not fix this problem .have checked rechecked and checked all over again of all replyes have done all of them. so iam ending this so some one else can post a problem custermer is going to se...
1998 Chevrolet Venture LS 3.4L No Start VIN: 1BNDX03EWD
2001 Chevrolet Malibu 3.1L No Start VIN: 1G1ND52J51
well this just shows the power of iatn ... just about all of the replies pointed to the passlock sensor on the ignition cylinder , with odds like that its got to be a pattern failure , so replaced the passlock igniton cylinder and reset the security by leaving...
2002 Chevrolet Monte Carlo SS 3.8L No Start, MIL Lamp on, security light on VIN: 2G1WX15K32
WELL GUYS THIS ONE TOOK A LOT OF TRIAL AND ERROR TO REPAIR AND I USED EVERY PIECE OF INPUT I RECIEVED FROM ALL OF YOU. FIRST I REPLACED THE IGNITION KEY TUMBLER AND RESET THE SECURITY SYSTEM. THIS SEEMED LIKE IT FIXED IT FOR ABOUT A WEEK UNTIL THE SECURITY LIG... Trouble codes: U1000 (class2 datalink malfunction), U1064 (lost communication with BCM system), B1004 (kam reset), B1780 (theft lock enabled for radio), P1626 (theft deterent fuel enablesignal lost).
2003 Chevrolet Silverado 2500 HD 6.6L No Start, MIL Lamp on VIN: 1GCHK29163
the first thing we did was to clear the codes to see what would return. the po380 came back evertime, so with scanner hooked up we could see the glow plug relay come on, but had no voltage being appiled. after we replaced the glow plug relay there were no more... Trouble codes: U1064, U1800, P1621, P0380.
1995 GMC K2500 Suburban 6.5L MIL Lamp on, code 78 VIN: 1GKGK26F2S
First of all I want to thank everybody that replied, there were twomain responces, change the waste gate solinoid and or vacume pump problems. what I did was change the solinoid and also found the fuel filter restricted, so I changed that as well. I really th... Trouble codes: 78 (wastegate solinoid fault).
2001 Pontiac Grand Am SE 2.4L Misfire VIN: 1G2NF52T71
Well, I've waited as long as possible and I believe (hope) this vehicle is fixed. All parts in the vehicle now are GM dealer parts. I also replaced the aluminum engine cover to eliminate any mounting/distortion issues and I added an extra ground from the cov... Trouble codes: P0300 (random cylinder misfire).
2002 Pontiac Grand Am GT 3.4L No Start VIN: 1G2NW12E92
Thanks to all who responeded.Thank you Mike and Allen,the a/c clutch was the problem causing the 10 amp a/c, bfc fuse under the hood to blow.Replace a/c clutch and car starts okay and no problem with the fuse blowing. Trouble codes: B2965, B2960, B1374.
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next