Join Now
International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 28, 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
1993 Buick Regal 3.8L draw VIN: 2G4WB51T3P
hey, we have this buick that has an intermittent draw on the battery. There is no draw on the battery when we check it. It takes a couple days but the the battery is completly flat some times, seems to be more often when it is cold. I was just wondering if any...
1997 Buick Park Avenue Ultra 3.8L security system VIN: 1G4CU5212V
Hi Techs,I had a no start no crank on this car and took care of a battery problem first and security light was flashing so I did a relearn and it started every time. A few days later car will not crank. I see the security light is on again when key is in run p...
1991 Cadillac Fleetwood 4.9L Misfire VIN: 1GEDZ90B1M
We have a miss on #4 cylinder, fuel pressure good, injector working, 175lbs comp 75 running. Spark good, cap replaced, plug replaced. This miss starts at cold start up and continues even after warm up. I can't give you gas reading as we don't have a gas analiz...
1998 Cadillac DeVille 4.6L mirrors VIN: 1G6KD54YOW
Howdy, I got a 77 year old that we got into a newer caddy, His old 85 model was crippled and needed to walk towards the light. His complaint is that the mirrors wont stay adjusted. The problem is the mirrors point down in reverse and upon noticing that he adju...
2000 Cadillac hearse 4.6L No Start, no crank VIN: 1GEEH90Y5Y
Hi All, I have a 2000 Caddy Hearse (Deville) was towed in No Crank No start. With the symptoms i am having I feel there may be multiple problems. I checked voltage at starter solenoid wire and have 7 volts with key off. UNplugged starter relay, still 7 volts ... Trouble codes: U1000, U1096, U1301
1995 Chevrolet Cavalier 2.2L heating VIN: 1G1LC52465
Thanks in advance, The issue im having is very minimal output from the heating system in all vent positions. I recently installed a new heater core due to the previous unit leaking. During install i noted the mixture flap was opening and closing and was not bi...
1995 Chevrolet Cavalier 2.2L leak VIN: 1G1LC52465
i have researched all other common fuel leak issues on these vehicles and it is apparent that these go through injectors alot, but my complaint is a little different. After the vehicle has been driven for a short or long distance and shut down about ten to fif...
1999 Chevrolet Astro 4.3L Poor Idle Quality, Hesitation, Stall, MIL Lamp on
The intake manifold gaskets were just replaced to correct a coolant leak.the distributor was carefully marked when removed, and reinstalled properly.I've checked repeatedly for a "tooth off" condition to no avail.Cam retard pid is at -7. The engine wont idle,w... Trouble codes: P1345 (cam sensor sync problem)
2002 Chevrolet Malibu 3.1L Stall VIN: 1G1ND52J42
Hello fellow techs, I have this Malibu that is make me turn old just sitting here. WEll vehicle came in for a Check Engine Light on, vehicle had a [...] a p1585, in the process of doing the diag, i found the lower intake gasket leaking and the upper plenum ...
2002 Chevrolet Impala 3.8L Starting VIN: 2G1WF55K02
Intermittent no crank. An on going problem over the past 3 months. The patrol states that the car will not crank at times has noticed more issue after vehicle has been opperated 4 hours or more. I have replaced the key lock and cylinder on symptom alone (did n...
2002 Chevrolet Silverado 2500 6.0L Pedal Height VIN: 1GCHC23U32
This truck belongs to a valued commercial landscaping customer. They complain the pedal goes to the floor randomly. We have been unable to duplicate the problem. The manager of the company drove the vehicle himself for about a week to ten days and said he expe...
2003 Chevrolet Express 1500 5.3L Hi Beam Headlights VIN: 1GNFH15T63
This van intermittantly will flash the hi beams erratically when driving. Can be day or night with daytime running lights on or with headlights on. Driveing down the road and all of a sudden the hi beams come on and flash crazily. Sometimes can move multifunct...
2003 Chevrolet Silverado 1500 4.3L Starting VIN: 1GCEC14X53
Thanks to all for taking time to help. I have this 03 Silverado that is flooded and will not start. I have a P1626 history code but the vehicle passed the last test it ran on this according to my Tech 2. Is a bad passock sensor the most likely cause? In the bo...
2005 Chevrolet Suburban 1500 LS 5.3L belt squeek VIN: 1G2HUI4569
hey everyone. i have a 05 suburban with what seems like a belt squeek have replaced ac belt and tensioner and main belt and tensioner and idler pulley all with gm parts twice. squeek will be gone for a few days and then return i have removed main drive belt an...
2007 Chevrolet Tahoe LTZ 5.3L MIL Lamp on VIN: 1GNFK13087
HI chevrolet gurus, I need a little help. Im working on a 2007 tahoe that originally had a driveability problem when the tank got down to 1/4 tank, found fuel pump to be defective, replaced fuel pump assembly and sender did not come with fuel pump assembly. i ... Trouble codes: P0463
1993 GMC K2500 Sierra 6.5L No Start, Stall VIN: 1GTGK29FOP
This truck originally came in for a blown head gasket. It ran and started fine other than bubbles in the cooling system. After replacing the right head and reassembling the engine, it was hard to start. On the initial start up, I attributed the excessive crank...
1994 GMC K2500 Sierra SL 6.5L Surge, Cuts out VIN: 1GTFK1953R
TDC offset it at 0 degrees. And timing is at 5.6 degrees on scanner. Spec for timing is 3.5 but it will not change when you loosen and move pump. When driving engine will loose power and check engine light will come on. When light goes off it will start runnin... Trouble codes: 88 (TDC Offset Error)
1997 GMC Yukon SL 5.7L Hesitation, Misfire VIN: 1GNEK13RGV
several shops have looked at vehicle, hence all the changed parts. When vehicle is cold it runs great, after it warms up it will lose power and run rough, if you stay in the throttle it will back fire in the intake and smother down and die. When you cycle the ... Trouble codes: P0131 (voltage low bank 1 sensor 1), P0137 (voltage low bank 1 sensor 2), P0133 (slow responce bank 1 sensor 1), P0134 (slow responce bank 1 sensor 2), P0300 (misfire detected)
2001 GMC Sierra 3500 SL 6.6L Cuts out, rpm drop no power VIN: 1GTJK39191
HELLO FELLOW MEMBERS OF iATN . I'm just getting around to my first duramax diagnostics problem.It has mostly been the P/S Ford's since the max has not been around that long,my problem is intermittent so far only pulling a trailer and a slight grade or better i... Trouble codes: P0234, P0308
1992 Oldsmobile 88 Royale LS 3.8L No Start VIN: 1G3HY53L2N
Hi Well, at least it has been awhile. I have a 1992 Olds 88 3.8 with no injector pulse and no start. Now, the obvious things are crank sensor, cam sensor , module and we have tried them all. We have 42 psi fuel pressure and what appears to be very good spark....
1995 Oldsmobile Aurora 4.0L Poor Idle Quality VIN: 1G3GR6ZC7S
Hello all and thanks for your help. Customer came in with a misfire complant about two months ago,we check it out and found no codes and it would not missfire for use at that time.I sugg a tune up because you could see some tracking on wires. Since that time h...
1996 Pontiac Bonneville SE 3.8L No Start VIN: 1G2HX52K3T
Vehicle has very intermittent no start problem. Sometimes problem may be there for a couple of days & other times does not appear for weeks. We have had it at the shop for 5 days & no problem, starts every time. Customer says that he hears a rapid clicking or ...
2002 Pontiac Firebird 5.7L Pinging or knocking VIN: 2G2FV22602
Thanks in advance for the help I get. I have this vehicle hat with a Ping in any gear range as long as it is accelerating. ping is much more noticible Noticeable between the 4 and 5 k rpm range. Used a tech 2 to look at timing while driving and PCM reacts to ...
2002 Saturn Vue 3.0L No Start VIN: 5GZCZ63B4Z
car came in with a complaint of hard start after cold or hot soak. we confirmed symptoms and started testing. we found a tsb for a loose ground behind l/f headlamp causing dim lights and hard start. we repaired ground and this did not correct hard start. occas...

Fixes & Summaries for GM
Fix/Summary Answers
2004 Buick Century Custom 3.1L No Start, Hesitation, Cuts out VIN: 2G4WS52J54
Thanks to all of you who replied: we have solved the problem which turned out to be the crank sensor at the rear of the engine. Although all scan tool data for this sensor looked normal we did note that the sensor was leaking oil. We removed the sensor for rep...
2000 Chevrolet Malibu 3.1L Unknown VIN: 1G1ND52JXY
Thank you for all the input. After narrowing the noise to the front it was sent to the transmission shop where faulty differential bearings were found. Again, thank you for all the help.
2002 Chevrolet Trailblazer LS 4.2L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GNDT13S52
i took a while to close this because i honestly did not believe it was a fix but it seems time has proven me wrong. first i want to thank the folks who took time out of there day to try to help. as most sugested a gm pcm and gm programming seems to have fixed... Trouble codes: P0601.
2002 Chevrolet Trailblazer LS 4.2L T-case VIN: 1GNDT13S02
Well I got this one fixed, 2 replies said to move the transfer case shaft to the correct position. I already tried this and found that the transfer case shaft could not be move far enough to align with the encoder motor. Another reply said to move the motor to...
2003 Chevrolet Impala 3.4L DIC Flashing Errors VIN: 2G1WF52E43
Thanks for all help given. It's always great to here from other techs & know your not the only one with wacky problems at times. Problem seemed it should be easy to find & repair due to the problem was considered somewhat hard fault. But several things made...
2005 Chevrolet Tahoe LS 4.8L ABS/Traction control VIN: 1J31V08N45
Thank you all for your help. We removed the rear WSS and found that the sensor gear was missing a tooth we suggested to replace the sensor gear but the Body shop wouldn't listen and send the truck to the dealer. Now the truck has a new rear end and no ABS/Tra...
2002 GMC Sierra 1500 SL 4.8L fuel,temp guages, shift indicator, clock VIN: 1GTEC19V92
Thank you to everyone who replied. customer has not returned for further diagnostics. I would have liked to find out what the problem was. Again thanks to all who replied.
1978 Pontiac Firebird Trans Am 6.6L Rear Brakes VIN: 2W87Z8N186
Hey everyone, I didn't have any lick at any of the sites ya'll gave me but I did have some luck elseware. There is a company called Scarebird disc brakes that is now making and selling the brackets that have been dicontinued from GM. Nobody else out there make...
2000 Pontiac Sunfire SE 2.2L warning lamp VIN: 1G2JB5245Y
Look like the answer is YES, a dead EBTCM will illuminate the red brake warning lamp. After receiving several replies that said yes, we installed the customer supplied used EBTCM and all the warning indicators stayed out: Brake, ABS and Trac Control.
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next