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Prev Professional Automotive Repair Technical Discussions for August 19, 2004
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Open Help Requests for GM
Help Request Answers
1982 Chevrolet C10 Custom 6.2L Misfire, lack of power VIN: 1GTDC14C3C
Hello to all diesel techs out there. I'm having heck of a time on this diesel. I'm familar with 6.5 and 6.6, but never worked on 6.2. This truck came in with lack of power. I took it out for a test trive, sure enough it's very slow. I noticed hard start on col...
1990 Chevrolet Lumina Euro 3.1L No Start VIN: 2G1WN54T2L
Hi, I have a problem with this car, it keeps eating crank sensors, they last for about a day and half, then die. The car did restart for about 30 seconds. I really need to know why or what is killing them. Any help is would be great. Thanx.
1991 Chevrolet Astro CL 4.3L No VSS VIN: 1GNDM19Z2M
Hello all. This van has no speedometer reading and VSS on scantool shows 0mph all the time... Once or twice in a 5 min road test the speedo will jump 2-5mph, and the scan tool shows the same, but returns to 0mph and stays there. This van has no speedo cable an... Trouble codes: 24 (No VSS Signal Received)
1991 Chevrolet Caprice 5.0L unknown VIN: 1G1BL83E9M
This Customer has gone to great lenghts to repair a vibrationt that is pretty heavy between 62-75 mph per hour. It can be felt in the steering wheel as well is in the seat/ drivetrain of the vehicle. It did have a stiff rear u-joint so we sent the drive shaft ...
1996 Chevrolet Impala SS 5.7L power assist VIN: 1G1BL52PXT
Greetings to all, Working on a 96 Impala SS 5.7L. cust complaint of no ps assist until higher rpm are reached. Upon initial inspection fluid seemed extremely contaminated, black with a terrible smell. power flushed the ps system and installed a reman pump. All...
2000 Chevrolet Astro 4.3L No Start VIN: 1GCDM19WXY
ignition rotor (aftermarket ,niehoff brand) is melted from tip to center (more melted toward tip ) any ideas, this has happend 2 times in 6 months
2001 Chevrolet Silverado 2500 HD 8.1L MIL Lamp on VIN: 1GCHK24GX1
since truck was new this has been a on going problem the past year it has had the tac module changed and the problem had hapened only twice Trouble codes: P1221
2001 Chevrolet S10 4.3L No Start, Stall VIN: 1GCCS14W21
Truck was towed to us after stalling on the road. It would not start as received unless artificial fuel was introduced at the throttle body. KOEO TP voltage was very high, putting fuel delivery into clear flood mode. When the TP was unplugged, the truck would ... Trouble codes: P0101 (MAF signal out of range)
1996 Geo Tracker 1.6L MIL Lamp on VIN: 2CNBE1868T
The check engine light came on after driving the vehicle. P0300 set for a multiple misfire code. No misfire exists. Code sets when computer sees crank sensor slowing down with steady TPS signal. TPS is steady, and crank signal is good and not slowing down. Any... Trouble codes: P0330 (Multiple Misfires Detected)
1997 Geo Prizm LSi 1.8L MIL Lamp on VIN: 1Y1SK5283V
found code 1780 comes back every time vehicle is placed from park to any gear and back. new switch has same thing. found 12 volts on pcm connector pins for reverse, low, and 2nd gear, but not for park or neutral.also new wire from switch to pcm, has same probl... Trouble codes: P1780 (park/neutral position pnp switch)
1998 GMC Jimmy Envoy 4.3L 4X4 fuse VIN: 1GKDT13W8W
I really need some help on this one guys. I hope someone has run into this on before. Fuse #15 10A in the instrument panel feeds the transfer case selector switch, transfer case module, VCM, front axle switch, and mitchel says it feeds something with the abs. ...
2002 GMC Savana 3500 5.7L Misfire, MIL Lamp on VIN: 1GDHG31RX2
Need help all you gm techs. This truck was brought to us from Baltimore Md with a miss and mil on. We ran compression check and found no compression on #4 cylinder all others had 150 to 155 psi. Removed head and replaced burnt exhaust valve. After putting truc... Trouble codes: P0300
1988 Oldsmobile Cutlass Ciera 2.8L Misfire VIN: 1G3AH51WXJ
car misfires always, replaced rotten spark plug wires, check clean and gap plugs, check ignition secondary KV on scope, #4 not firing,0 KV, front bank of cylinders #2&6 weak KV like 5-7 KV,, rear bank all three have KV readings of 26-28, replaced ignition modu...
1999 Oldsmobile Intrigue GL 3.5L Oil Pressure VIN: 1G3WS52H9X
Need some help! This particular"short star" engine has a oil pressure problem once it reaches operating temp. Am having a hard time believing it is main bearings as there is no lower end thump. Vehicle has been maintained as per OEM recommendations & oil has b...
2000 Pontiac Grand Prix SE 3.1L Injectors VIN: 1G2WJ52J9Y
Very intermittent start and dies. When car was acting up for about 20 mins. we checked systems and found no noid this was the only time it did this for any long length of time any other time it starts and dies. We checked codes and found P1629 Theft Deterrent ...

Fixes & Summaries for GM
Fix/Summary Answers
1992 Buick Roadmaster Limited 5.7L Excessive Emissions, Poor Idle Quality, Surge, Stall, Misfire VIN: 1G4BT5376N
Many that responded suggested the EGR, which I forgot to mention I had all ready checked. Thanks to Stan [...] that hit it right on. The problem was with the distributor. A fault there, possibly a cracked magnet or a poor pick-up coil was causing a random inte...
1995 Cadillac DeVille 4.9L traction control VIN: 1G6KD52B1S
Thank you Wesley, who replied that code 33 is for the right rear wheel speed sensor continuity. I put it on the lift this morning and sure enough the sensor was disconnected. I plugged it in and everything was perfect. Thanks again Wes.
1992 Chevrolet Cavalier RS 2.2L Excessive Emissions, Poor Idle Quality, running rich VIN: 1G1JC1440N
Thanks to everyone who offered help on this problematic car. The customer told us that a new timing chain was installed on this car about 6 months prior to now, so we were not even suspect about the car jumping time. But, that's exactly what happened. The timi...
1995 Chevrolet C2500 Cheyenne 6.5L Hesitation, Stall VIN: 1GCGC24F4F
I was unable to repair this vehicle per the customer did not want to go any further, but did receive valid information I can share with the rest of you. One point was to check the lift pump on the frame rail under the driver's seat, would be able to hear pump ... Trouble codes: 78 (wastegate solenoid problem).
1998 Chevrolet Venture 3.4L system VIN: 1GNDX03E5W
we installed new compressor a/c delco , evacuate & rechage, everything is fine now. thank you for all the help
1998 Chevrolet Blazer 4.3L blend air door motor VIN: 1GNCS13W3W
ok guy's thanks for all the help. turns out that it was just the blend door motor. i learn that you can't just plug the blend motor in. you have to have it hook up to the blend door. or the motor will just go all one way and not back. the info you gave me help...
1998 Chevrolet Blazer 4.3L Transfer Case VIN: 1GNDT13W8W
Hello, I had several good replies but the customer did not want to proceed with it any further. What I did find however is that the transfer case fluid level way above full when I pulled the fill plug to check the fluid level. I advised the customer that the s...
1999 Chevrolet Silverado 1500 5.3L engine VIN: 2GECK19T4X
well gents, thanks for your replies. i don't know if this truck is fixed but, i ran gm top engine cleaner thru the intake and changed back to regular 5w-30 and i'll see how it goes. gm doesn't have any updated parts for these motors so if it doesn't clear up t...
2000 Chevrolet Silverado 1500 5.3L No Start VIN: 2GCEC19T4Y
Hey Fellow Techs every one was right on the money.The fuel pressure regulator was definetly bad.Thanks to the tech who said it could take up to 3 min for gas to start pooring out. I had that vac hose off the regulator at least 6 times and never leaked any fuel...
1990 Geo Tracker 1.6L No Start, Poor Idle Quality, Surge, Stall, Misfire VIN: 2CNBJ18V0L
Sorry, I neglected to mention the computer was replaced by another technician two other times. Both computers failed the same way and lasted about six months. So, on to what was wrong with the Tracker. Originally I came in as a second party help to another tec...
2001 Pontiac Grand Prix GT 3.8L Excessive Emissions, Poor Idle Quality, Hesitation VIN: 1G2WP52K01
Thanks for the replies ... I sent this car to the dealer since it was covered under 8/80000 emission warranty as many of you suggested.. The cat was replaced but the cause of the failure was the intake manifold... I have replaced many of this plastic manifolds...
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