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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 28, 2008
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Open Help Requests for GM
Help Request Answers
2008 Cadillac cts 3.6L extended crank time VIN: 1G6DT57VX8
this is for you caddy techs - good customer w/new cts(less than 2,000 miles) has extended crank time after extended sit.(all nite or all day at work) has had to the dealer w/no results - said possibly poor fuel quality - could not duplicate promlem - customer ...
1996 Chevrolet Cavalier 2.2L No Start, Cuts out, Stall VIN: 1G1JC1241T
This car came in as an intermittent stall and another tech in the shop worked on it. He did a basic tune up and a map sensor ( He isn't here today so I can't ask if it had codes or not ) The car came back not running at all the next day. It fuel and an injecto...
1996 Chevrolet K2500 Cheyenne 7.4L rear axle VIN: 1GCGK29J3T
This is what nightmares are made of...3 years of I can not get it to stop leaking out of the rear axle seals.This is a full floating axle, 8 stud ,3/4 ton ,4x4.For the last 3 years the axle seals let go...no reason..the max time I get before they let go is abo...
1997 Chevrolet K1500 5.7L master cyl. VIN: 1GBEK19R3V
customer came in with a noise. found broken brake rotor. replaced pads and rotors. pedal felt soft afterwards. found leaking wheel cylinder and cracked shoes. replaced shoes, drums, and cylinders. still soft. flushed dark fluid, still soft. if i pinch off fron...
1997 Chevrolet C2500 Cheyenne 6.5L heavy black smoke VIN: 1GCFC2459V
Truck has heavy black smoke on acceleration and no power.A new lift pump was installed for no fuel psi,presure in spec with new pump.Pump timing was set to spec. Injector balance test all cylinders seem equal. With each cylinder disabled one at a time the engi...
1998 Chevrolet Blazer 4.3L MIL Lamp on VIN: 1GNDT13W8W
Truck Came From A Good Customer. They Installed A Fresh Rebuilt Engine,Installed Themselves. Brought It To Us For A Check Engine Light,Code P1345. Should Be An Easy Dist. Set Up Problem. If I Set Up Dist.Per AllData. I Get -23 Deg. Cam Offset, I Install One To... Trouble codes: P1345
1998 Chevrolet K2500 Suburban 7.4L Poor Fuel Economy, hard start VIN: 3GNGK26J0W
This is my personal vehicle. It figures it's the one I can't seem to fix. The problem is I have a hard start after driving or after a heat soak. Fuel seems to be leaking into the intake, confirmed this by pulling the upper intake off and leaving the fuel rail ...
1999 Chevrolet Blazer 4.3L key fobs VIN: 1GNDT13W6X
key fobs will program but will not work after program have replaced the rke module
2000 Chevrolet Malibu LS 3.1L MIL Lamp on VIN: 1G1NE52J8Y
good evening all i have a 2000 malibu here with a 3.1, it came in with a check engine light on, it had codes po401, po440, po442, and po1404 stored in it, the egr valve was stuck closed so that took care of the egr codes. i then ran a smoke test on the evap ... Trouble codes: P0440
2002 Chevrolet Trailblazer LS 4.2L Odometer,PRND indc and idle variation VIN: 1GNDT13592
Hello and good evening. This is a wierd one ,I have my ideas on this but I would like to get some other proffesional input. When car is at idle in park,turning the fan switch on with the a/c button turned to the on position,compressor will engage and more ofte...
1999 GMC K2500 Sierra SL 7.4L Hesitation, Surge, Cuts out, Misfire
Engine cuts out and stumbles intermittently under load. road test with data shows ft enable dropping to no periodically, especially when stumble occurs. I know i need to replace fuel pump, but that is not the intermitent. Anyone know what "ft enable" means. Al...
1993 Oldsmobile Cutlass Supreme S 3.4L Poor Idle Quality, Surge, High Idle VIN: 1G3WT34X1P
This vehicle came in for the high idle (2000-3000rpm). I scanned the computer and pulled code 35, checked the IAC steps and KOEO IAC was 130, engine running IAC drops rapidly to 0. I smoked the intake and found a lower intake leak and smoke from around the thr... Trouble codes: 35 (IAC Failure)
1989 Pontiac Firebird Trans Am 5.7L Poor Idle Quality, Hesitation, Stall VIN: 1G2FW2182K
I apologize for the length, just trying to make sure I put in as much info as I can.I had purchased this Trans Am earlier this summer and it ran fine for the most part. It always fired up, but would stall unless you hit the gas for a few seconds after start up...
2002 Saturn Vue 3.0L MIL Lamp on VIN: 5GZCZ63BX2
thanks in advance . this vehicle has a intermittant code p 1779 , ecm not sending required info to the tcm. we only have a intermittant code p1779 ,when the mil comes on the vehicle, intemittantly stalls & has no passing gear. when we erease the code it operat... Trouble codes: P1779

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Riviera 3.8L Hesitation, Stall, MIL Lamp on VIN: 1G4GD22K5S
I am having someone type this fix, as this one beat me so bad I no longer have control of my extremities. As stated in post, I had already done CMP, checked magnet, wiggle test, scoped cam and crank sensors and new pcm. I had it up in the air, and decided to p... Trouble codes: P0342 (cmp signal circuit), P0341 (cam crank sync error).
1995 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52L6S
i am cautiously optimistic when i say this one may be fixed.five days so far and no failure.as we all know,intermittent failures are the worst,and this was no different. i did a lot of the work suggested by you guys before my post,but all your input helped me ... Trouble codes: P1361.
2002 Buick Rendezvous CX 3.4L no crank / no run VIN: 3G5DB03EX2
I have fixed this vehicle the wiring harness was routed thru the motor mount up front. when motor would move just right it would short wire and blow fuse.thanks for the help. we followed the wires like suggested
1990 Chevrolet Lumina 3.1L No Start, Poor Idle Quality, Stall
Thanks to all who replied...Many of you sugested to ohm test the injectors.. .I pulled the intake plenium and tested each injector...I found 1 injector with 4.1 ohm..1 with 10.2 and 2 with 11.3 and 1 with 12.1 ohms...We contacted the customer with an estimate ...
1994 Chevrolet Camaro 3.4L Hesitation, Cuts out, Misfire, high rpm back fire t VIN: 2G1FP22S2R
Thanks for all the help. Everyone's suggestions were helpful. After eliminating(and re-checking) all electronics again (ignition & fuel control systems) we were BACK to mechnical, AGAIN. We were about to remove heads AGAIN and re-check valves/seats/springs AGA...
1996 Chevrolet C1500 5.0L speedo VIN: 1GTEC14M8T
replaced customer installed speed sensor, trans shifts fine now. ohms reading - voltage output from sensors are the same but this one works
1998 Chevrolet K1500 Cheyenne 5.7L Rear Brakes VIN: 1GCEK14R4W
It has been over 2 weeks since the customer picked up his truck and has since left a voice mail to say it's no longer squealing. I ripped the shoes off and on the backing plate there is an inner ring that mates in the groove in the edge of the drum. This rin...
2002 Chevrolet Astro LS 4.3L MIL Lamp on VIN: 1GNDM19X52
We found a low compression on cylinder #4. The customer did not want to spend money for the valve job and/or injector unit at this time and declined the repair, since the van is still running o'k and has lots of power. Special thanks to the following techs: Th... Trouble codes: P0304.
1995 GMC Jimmy 4.3L Light on VIN: 1GKCS13W4S
Hello guys and thanks for your help, unfortunately the owner needed her car so she took it, but she'll be back, is there a way to post an update on a closed post? I agree with the guys who think the problem is the EBCM, so I'll get one and call this customer b...
1997 GMC Yukon SLE 5.7L Electronic VIN: 1GKEK13R1V
Thank you so much IATN,you did it again! The problem was very intermittent, but with your help, was able to educate the customer. The customer did indicate the PRNDL did indeed go blank when the check engine light came on as some of you mentioned, indicating a...
2000 GMC Savana 2500 5.0L anti theft problem VIN: 1GTFG25M2Y
first of all i would like to thank everyone who responded.actually we did not installed any parts to this van because it did not die on us.the only thing we did was we removed the big bunch of keys from his gear shifter that we thought might be interfering wit...
1993 Oldsmobile Cutlass Ciera 3.3L Unknown VIN: 1G3AG55N3P
We will call this one fixed. I believe the bearing just plain wore out. Possible coolant in the oil from the leaking gaskets or I did find a TSB that GM had some of these motors come out with to large of clearances on the #1 main and needed the bearing replace...
2000 Oldsmobile Intrigue GLS 3.5L EBTCM module VIN: 1G3WX52H7Y
The car is fixed, finally. All the responses cautioned me to be sure to check power from the ignition switch. I checked and rechecked all the powers and grounds and visually checked the connector to the ebtcm. Everything checked out every time, but it alwa...
2000 Oldsmobile Alero GX 2.4L abs VIN: 1G3NK52T3Y
thanks to all that replied it ended being what i thought and every one else from the beginning a bad wheel speed sensor i just could not find the glitch with scanner or scope thanks again Jeff
1999 Pontiac Bonneville SSE 3.8L Interior lights VIN: 1G2HZ52K4X
Did test grounds early in testing, as that is what it acted like. Battery had been replaced earlier but connections were clean and tight. Same with body grd. As suggested by Paul & Gary, tested door switches. Lt.Grn/Blk wire at BCM and grd. Tested 3.8m ohms, ...
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