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Prev Professional Automotive Repair Technical Discussions for September 6, 2005
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Open Help Requests for GM
Help Request Answers
1991 Buick Regal Custom 3.8L No Start VIN: 2G4WB54L2M
fans run at anytime,does notread on scranner
1994 Buick LeSabre Limited 3.8L Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1G4HR52L3R
check eng. light goes on & off & sets both codes(341,342) at the same time engine stalls/surges only at idle & worse cold. we replaced crank sensor, module, & even disconnnected cam sensor & still acts up. cam sensor magnet is in place & it does have a good cl... Trouble codes: P0341, P0342
1994 Cadillac DeVille 4.9L Cuts out, Stall, Misfire VIN: 1G6KD52B4R
this car runs ok until you run down the freeway and it doesnt matter if its a 1 mile run or 50 mile run just as you exit it looses power for about 15 to 30 seconds then ruturns to normal ive been working on this vehicle for a while fist time it came in found l...
1995 Cadillac Eldorado 4.6L shift solenoid b VIN: 1G6EL12Y0S
after replacing solenoid kit cleared codes and test drove.5-10 seconds after ecm trys to shift solenoid b it sets codes 29 and defaults to backup shift pattern. if anyone else has had this problem please help. or if i am missing something in my testing. ihave ...
2001 Cadillac DeVille 4.6L Electronic VIN: 1G6KD54YA1
I have warm air coming out of the driver side a/c vent and cool air coming out of the Pass, side I checked the a/c system and pressure is good the system seem to be fine mechanicaly but i dont get cold air from the driver side. The is no codes, the blend doors...
1990 Chevrolet Celebrity 3.1L No Start VIN: 2G1AW84T8L
This car towed in to shop, won't run. Has fuel, good pressure and good spark, but no pulse from injector. The injectors got juice but no ground signal from computer while cranking and no data from ALDL. No blinking mil light when grounding at ALDL, all bulbs a...
1993 Chevrolet K2500 Cheyenne 6.5L engine VIN: 1GCGK24F7P
I was wondering if I could get some help with this diesel. Owner is a good friend, and I do not have much diesel experience. Owner complaining of misfire, runs rough, smokes more than usual. I have loosened fuel lines at injectors, but every cyl. seems to be p...
1993 Chevrolet Camaro Indianapolis 500 Pace Car 5.7L module faults VIN: 2G1FP22P1P
Hey Chevy guys. I just bought the car and took a trip to PA. I took my modis along just to moniter everything. On the way up I noticed a rough idle at a rest stop. Had injector fault on bank 2. Also oil temp was -34. On the way back inj fault did not reappear ...
1996 Chevrolet S10 2.2L MIL Lamp on VIN: 1GCCS1445T
This vehicle must be inspected by state. It will not pass with the MIL light on. The only code that shows on a SnapOn scanner is P0122 (TP sensor). The TP sensor was replaced. All other systems appear to be normal. No other codes or extreme readings observed o... Trouble codes: P0122 (TP Sensor)
1996 Chevrolet K2500 Cheyenne 6.5L 4th gear drops out VIN: 1GTGK29F5T
This post is for a fellow tech who I work with,and is working on his own truck.His diesel has a 4l80e trans and he has a problem with 4th gear when he lets off the throttle the engine goes to idle and when he applies throttle there is no engagement.He has went...
1997 Chevrolet C1500 4.3L Misfire VIN: 1GTDM19W3V
This vehicle came in with an SES light coming on going up a hill. I road tested the vehicle and found the vehicle has a dead misfire on cyl 1 as soon as you reach 100km As soon as you slow down below 100 km the miss stops. I monitored fuel pressure during the ... Trouble codes: P0301
2001 Chevrolet Silverado 2500 HD 6.6L no acceleration VIN: 1GCHK23181
This truck has twice when towing a trailer in the mountains at full operating temperature lost power ad the customer has not been able to accelerate over 2000 rpm. Code has appeared both times but upon checking no problem has been found. Has anyone seen this p... Trouble codes: 93 (Fuel pressure lower than commanded value)
2002 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: 1GNDS13S02
This truck came in with a check engine light on and code 1345 in the computer. It has no running problems that I have experienced but the customer says that it has poor performance at times. I commanded the cam phaser to 10% at about 1500 rpms and it goes righ... Trouble codes: P1345
1996 GMC Sonoma SLE 2.2L Excessive Emissions, Poor Idle Quality VIN: 1GTCS1946T
Good morning group. I have a 96 sonoma 2.2 that was towed in for overheating. We have installed a used engine and the motor runs fine but i will not idle properly. It runs extremely rich at idle. It will rev fine and run down the road fine but if you back off ... Trouble codes: P0108, P0107
1999 GMC Savana 2500 5.7L No Start VIN: 1GTGG25R6X
van came in with no fuel pump running, pound on tank fuel pump starts working, drive in shop remove fuel pump to replace and found out the new pump sender dosent have the hole for the pressor sensor. acording to GM if it is 8600 gvw or more the pump dosent hav...
2001 GMC Savana 2500 5.0L Stall, Misfire, INT NO POWER VIN: 1GTFG25M51
this is the van from hell it came in from anouther shop who replaced every thing they rebuilt the engine replaced inj spider cap rotor pluges wirers fuel pump and it still has an interminten skip also stalls and looses power sets [...] and p300 all interm... Trouble codes: P1381 (missfire detected no ebcm/pcm serial data), P0300
1990 Oldsmobile Delta 88 Royale 3.8L No Start VIN: 1G3HY54C9L
this one has me puzzled so here goes...occasionally this one wont start - it cranks fine, has good fuel pressure and great spark but the computer sometimes wont trigger the injection. It happens when it is stone cold or when hot - temp doesnt seem to matter. T...
1995 Oldsmobile Cutlass Ciera 3.1L Excessive Emissions, No Start, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G3AJ85M3S
every part on this thing has been replaced as far as sensors i had listed tune up fuel pump and filters and they have tryed 3 ecms in it too came in this morning and it would fire and smoke like regulator but not a leaker,checked for codes 341 cleared comes ri... Trouble codes: P0341
1980 Pontiac Firebird 5.0L Shifting Points VIN: 2X87TAN135
I have numerous problems with shift points on this Non Lockup turbo 350 Transmission. Clutches Bands and Engagement are all Excellent - I am able to get all three gears to screetch. The problems are as follows. Manual First does not stay in first it short shif...

Fixes & Summaries for GM
Fix/Summary Answers
1989 Cadillac DeVille 4.5L Instrument cluster, hvac control, VIN: 1G6CD515XK
Thanks again for the nine replies. The majority stated that they felt the ac compressor coil was begining to short. One reply even had a spec of 3.1 ohms. Sure enough the new coil was 3.5 ohms. I tried to induce the failure by running the vehicle for half the ...
1995 Chevrolet K1500 5.7L oil level VIN: 1GTEK19KXS
Thank you all for the advise. We are going to try and switch it back to a standard oil to see if it helps. We were just going to try to switch it to synthetic for gas mileage reasons. Once again thanks to everyone who replied.
1995 Chevrolet K2500 Cheyenne 6.5L turbo VIN: 1GCGK24F4S
Hey Chevy diesel guys, Thank you so much. Many of you were close to the problem or right on. We found that the vacuum was ok. We found that the wire going to the solenoid operating the waste gate on the turbo had a bad connection. No more excessive smoke, no...
2002 Chevrolet Tahoe LS 5.3L No Start, Cuts out VIN: 1GNEK13Z92
Sorry for the late reply, heavy workload, vacation etc. Thanks to all who replied. James [...] added fuel and found no fuel pump operation because of no actuating signal to the relay, Charles, the fuel module is not on that circuit, that circuit powers the PCM and...
1998 Pontiac Firebird 3.8L Poor Idle Quality, hard start VIN: 2G2FS22KOW
First of all thanks to everyone who sent in replies.There were a lot of good ideas.All the test I performed showed everything in spec.It didn't do anything much for us after cleaning the throttle body.I called the cust. this afternoon and he said it was doing ...
1999 Pontiac Grand Am GT 3.4L MIL Lamp on VIN: 1G2NW12E0X
thanks to all who replied. the fuel pressure was leaking. fixed the problem. again thanks Trouble codes: 172 (rich exhaust), 440 (emission evap leak).
2000 Pontiac Grand Am SE 3.4L Stall VIN: 1G2NF12E2Y
Thanks to everyone for your help. The replies all suggested a faulty crank sensor, broken crank sensor wiring possibly from being misrouted and hitting the exhaust, a faulty ignition module or a bad fuel pump. I checked the crank sensor wiring and it was fine....
2001 Pontiac Aztek 3.4L all VIN: 3G7DA03E61
Thanks to all that replied. The radiator was clogged 3/4 of the way with sealer. The guy who was suppose to fix this vehicle originally filled the system almost entirely with sealer. After removing the radiator was took the tanks off and got to see how well th...
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