× 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 May 19, 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
1997 Buick LeSabre Custom 3.8L Surge, Cuts out VIN: 1G4HP52K8V
Hello all you GM tech's, This one has not done this problem for us so I will post what the customer says it does. They say that at part throttle and mostly up hill the car will act as though your are on and off the throttle with the foot. So it sounds violent ...
1999 Buick Century Custom 3.1L loses power VIN: 2G4WS52M8X
After the engine is barely warm, vehicle bogs down as in limp mode. When idling, the 24x signal matches the 3x signal. As soon as you accelerate, the 24x signal goes to zero. Before the car came to us, the MAP and MAF sensors were replaced. We replaced the cra...
1997 Cadillac DeVille 4.6L Misfire, MIL Lamp on VIN: 1G6KD54Y4V
Vehicle came to us just purchased and failed emissions in hand, vehicle also running rough. My driveability tech performed test drive and pcm scan. Vehicle had P0131, P0135, P0138, P0147, P0340, P0603, P1571, P1660. Vehicle failed emissions not only for codes,... Trouble codes: P0340 (IC module cam reference CKT no frequency), P1571 (Traction Control system Pulse Width Modulated circuit no frequency.)
2000 Cadillac Eldorado ETC 4.6L front end VIN: 1G6ET1293Y
this caddy has a hard clunk only when turning right. you have to be almost two third's full right. sounds like a spring jumping but its not. new struts and mounts with bearings, ball joints good. the problem is it's not constant. might only do it once or twice...
2003 Cadillac CTS 3.2L windows door locks and radio VIN: 1G6DM57NX3
the power window intermitantly dont work from the master switch.Also the drivers door lock and unlock switch int works.When this happens the radio will turn on or off or just change channels on its own.when the windows dont work the tech 2 shows window at idle...
1993 Chevrolet Camaro 3.4L vaccum valve VIN: 2G1FP22S2P
Hi techs I have a camaro that came in for ac not blowing out of vents. I found the vaccum valve at the firewall that controls the switching to be deteriorated and falling apart Replaced valve and the vehicle vents worked fine air from all selections worked fi...
1995 Chevrolet Blazer 4.3L Misfire VIN: 1GNDT13W2S
Misfire occurrs only during warm up at about 60 mph and only for a very small amount of time. Maybe about the time the TCC engages, though it is not the TCC slipping or chattering. Once operating temp is reached there is no more misfire. I replaced the cap a s...
1998 Chevrolet Express 3500 5.7L front pads VIN: 1GCHG35RXW
Hello all, I have a fleet customer with this van and others in this vintage(98-2002) and have had many of his vehicles that wear out front pads in anywhere from 8,000 to 15,000 miles(most in the 15k range) We have tried many different brands,durastop,bendix,OE...
2007 Chevrolet C4500 Kodiak C4C042 6.6L Hesitation, Poor Fuel Economy, No power VIN: 1GBC4C1987
This truck have not been work on by us, but have the spacers been put in by telecommunication service man so the truck can drive to our shop. it seems that its clogged up but not sure why and how it works. The catalytic convertor thing seems to have two hose a... Trouble codes: P2463 (Undocumented), P244B (Undocumented), P2033 (Undocumented), P0546 (Undocumented)
1994 Geo Prizm 1.6L Cuts out, Stall VIN: 1Y1SK5369R
car came in because of died on the road . was able to get started when it got here . boggs out and dies when you put any kind of load on it. will idle fine and rev to half throttle when sitting in the bays but if you go over half will bogg down and dies . i ha...
2002 GMC Envoy SLE 4.2L timing cover VIN: 1GKDT13S62
I have a coolant leak from the timing cover and ALLDATA says the oil pan must be removed to do the case cover gasket. Just wondering if anybodys done one without removing the oil pan as it would make this job a whole lot easier on everybody including the custo...
2003 Pontiac Grand Prix SE 3.1L MIL Lamp on VIN: 1G2WK52J73
installed used motor(low mileage motor)with no problems. after 5k check engine came on po420. downstream o2 sensor looked sluggish, replaced it. came back shortly after with check engine on again po420. watched o2 sensors cat looked dead, replaced with afterma... Trouble codes: P0420
2002 Saturn SL1 1.9L Reverse VIN: 1G8ZH52862
Hello all, I have one here I hope someone has run into before. This one has a delayed engagement into reverse. All forward gears seem fine. I have a Mastertech scanner and did not come up with any codes. Data pids show fluid pressure in specific gears and when...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Buick Park Avenue 3.8L A/C Compressor VIN: 1G4CW53L2P
First,IATN,You guys are great.Most hit it on the head.I feel like the only Tech that didn't know how to Clear control head.Disconnected Battery. ,Reconected,Charged A/C,System Operating Normal.As for the Orfice Tube , it was indeed in the Liquid linefrom Cond...
1987 Cadillac Allante 4.1L battery VIN: 1G6VR317XH
Thanks for everybodys help it turned out to be bcm replaced now at 15ma. Hope I never see another one. Thanks again for everybodys help.
1993 Cadillac Seville STS 4.6L No Start VIN: 1G6KY5293P
OK The caddy is running again. Big thanks to all who replied, especially Juan [...] who went in his back lot and found the part I needed and sent it to me. As I suspected someone had been in this thing before and had lost the retainer that holds the o-ring...
1977 Chevrolet Corvette 5.7L water valve VIN: 1Z37L7S407
Thanks to all that replied. Special thanks to David and Craig on information in regard to the operation of the vacuum switch. I had been unable to get the info on how this valve was operated from mitchells or thier tech. assistance. Knowing that it is pushed b...
1999 Chevrolet Malibu 2.4L tensioner VIN: 1G1ND52T2X
Thanks you guys without you I do'nt think I would have fixed this vehicle.Every other shop pretended they did'nt know what I was talking about.TO all you guys that told me to reset the tensioner you were rite thats the only thing that was wrong' wish you had b...
2001 Chevrolet Impala LS 3.8L Drivers side vent VIN: 2G1WH55K21
Thanks to everyone on your input. Looks like a proper evac & rechrg, with good working machine, took care of the problem.
2003 Chevrolet Blazer LS 4.3L Misfire, MIL Lamp on VIN: 1GNDT13X23
i was mistaken about switching injectors from one cylinder to another. just because you have fuel, fire, compression and timing doesn't mean you can't have a misfire on a cylinder. replaced #4 injector and she runs like a sewing machine. my guess is that the... Trouble codes: P0300.
2004 Chevrolet Cavalier LS 2.2L abs VIN: 1G1JF52F44
Thanks for the suggestions. They were having two problems one was the abs would set off when braking and taking a left turn ocasionly. When I drove it I noticed the squating. I replaced a section of the wiring harness that goes to the abs wheel sensor. I d...
2005 Chevrolet Suburban 1500 Z71 5.3L transfer case VIN: 3GNFK16Z95
thanks for all your help. it was the encoder sensor in the motor that was the problem.
1987 Oldsmobile Cutlass Ciera S 2.8L Cuts out, Stall VIN: 1G3AJ11W2H
GENTLEMEN. Thank you for all your excellent tips. It is nice to see that I'm not the only one that knows these 'secrects' and that you must first stick to basics. I neglected to mention that BARO PID remained steady which indicated good 5V and ground. Having r... Trouble codes: 34 (low map).
2006 Pontiac Vibe 1.8L No Start, Cuts out VIN: SY25L65836
thanks for all the help. thanks to alex from georgia for the tip on the computer. that was the problem. sent to dealer for new computer and relearn.
2002 Saturn SL 1.9L lifter tap VIN: 1G8ZF528X2
thank you to all five responders to this problem.as per all of your recomendations and the fact that everything checks good,we recomended to replace all lifters.the customer decided to take to local saturn dealer for there reccomendation.my guess is that after...
2002 Saturn SL1 1.9L No Start, MIL Lamp on VIN: 1G82H52822
Well, thank you William, Ray, Timothy, Marty and Jon for taking the time to reply. I would have to guess Ray was probably the closest and Marty had several good points. I did not experience another problem with this car after I posted, we drove the car 91 mi... Trouble codes: P1599, P1620.
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next