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Prev Professional Automotive Repair Technical Discussions for March 19, 2009
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Open Help Requests for GM
Help Request Answers
1994 Chevrolet Lumina APV 3.8L Cuts out, MIL Lamp on VIN: 1GNDU06L6R
The customer complaint is the engine dies while driving or on initial start up when cold. Once the engine stalls it will restart after the key is cycled off. The check engine light will come on after the engine is restated. The problem has never occurred for m... Trouble codes: P0341 (cam/crank error), P1361 (no control module toggle)
1995 Chevrolet C1500 5.0L Hesitation, Surge
Vehicle came in with poor running condition just off idle, we found that the egr valve is opening just as it starts to run bad, we noticed on the scan tool that the desired egr value goes right to 99% immediatly, as does the egr duty cycle, there is a pid on m...
1997 Chevrolet Blazer 4.3L tip in stumble VIN: 1GNDT13W5V
light throtle in park or driving has a rich stumble in open or closed loop, fuel presure is ok, presure regulator isn't leaking, egr passages are clean, does this enough to get random misfires in the misfire data, but not any common cylinders, when stumbling o...
1997 Chevrolet C1500 4.3L Excessive Emissions VIN: 1GCEC14W3V
The 02 sensors are switching ok( P0147 including the b1s3 ) the tp sensor voltage readings are within range ( P0121 ) ( P0300 ) was in freeze frame only, there are no misfire counts showing on any cylinder. The stft's 1 & 2 are at mid 120's the ltft's are at ... Trouble codes: P0147 (history code), P0121 (current code within specs), P0300 (in freeze frame only)
2001 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1E52J116
Hey Guys and Gals, I have this Malibu that is becoming my Comeback Kid car. Very good customer came in about 3 months ago complaining on MIL on. We scanned vehicle and got Catalitic Insufficiency Below Threshold. We replaced both O2 Sensors and cleared the cod...
2004 Chevrolet Silverado 2500 HD 6.6L Surge VIN: 1GCHK23284
ok duramax guys, have a 2004 chevy k2500hd with 6.6l diesel. customer says that vehicle will suddenly lerch foreward while idleing in gear with foot an brake pedal. states vehicle has done this several times over the past few months. no service engine light o...
2004 Chevrolet Malibu Maxx LS 3.5L No Start VIN: 1G1ZT64844
Hello: this problem is very intermitant, and only occurs when trying to start the vehicle. At one time we had no fuel pressure when cycling the key or cranking, when adding starting fluid the car runs until the starting fluid is burned and then dies. While tes... Trouble codes: U2108, U2109, U2111, U2105, B1380 (Ign. sw. accesary power grounded), P1626 (Pass key III)
2007 Chevrolet Avalanche LTZ 5.3L Low oil level VIN: 3GNFK12397
Hello techs need a little input on this Avalanch the low oil level stays lit unless I push the check button on dash then stays out until next ignition cycle I tried unplugging sensor no change Whay am I missing? any help would be great thanks Mike [...]!!! OIL L...
2005 GMC Envoy SLE 4.2L misfire VIN: 1GKDT13S25
The car had a rough idle and the client added a fuel injector cleaner in the tank. It didn't change anything and 3 weeks later the mil light came on. I have a cyl # 2 misfire. Spark is good(verified and switched the coil with # 3) and the injector is also good...
2005 GMC Sierra 3500 SLT 6.6L gauge VIN: 1GTJK39275
been to the dealer they said it was not a recall or TSB For the year of 2005 but was for other years but i am having the same symptom as the other year's
1993 Pontiac Bonneville SSEi 3.8L No Start VIN: 1G2HY5211P
93 bonneville that has no power to engage starter solinoid. can't find starter enable relay, do dash have to come off to get at or im looking at wrong place. want to get to relay before condemning lock cylinder. tried 2 different keys and wont crank over unles...
1995 Pontiac Grand Am SE 2.3L Stall VIN: IG2NE55D5S
car will intermittently stall while driving on highway getting off exit ramp checked plugs fuel pressure everything seems to be ok no codes. afte the engine has been on for a while the oil pressure gauge drops to the red area i replaced the oil pressure sender...
1997 Pontiac Grand Am SE 3.1L idle in park
Hi, I have this intermittent problem with rpm oscillating between 500rpm and 1500rpm when in P. (half sec at 500 half sec at 1500rpm)it can even stall engine if I don't shift it into D then gradually goes to normal idle when it is in D. Other than that engine ...
2004 Pontiac Sunfire SE 2.2L speedo VIN: 1G2JB12F34
dash cluster gauges were bouncing , customer took to dealer and had checked , told it was a bad cluster , brought car to me with a used cluster to install , we installed used cluster all works well with the exception of the milage indcator ,it is now blank - d...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Park Avenue 3.8L bcm VIN: 1G4CW52K2X
The body module codes turned out to be unassociated with the no start problem. Replaced cam & crank sensors and have not heard anything from the customer.
2000 Buick Park Avenue 3.8L door locks,horn VIN: 1GC4W54K0Y
thanks to everybody my mama is happy.donald from montana made me think when he said that the driver side was the most used .it was the switch, door lock switch. all infoe was real good thanks to everybod.the switch was wore out,you could shake it and the door ...
1990 Cadillac Eldorado 4.5L Poor Idle Quality VIN: 1G6EL1339L
Thanks to all, and my apologies for a somewhat misleading post. I really was only asking about the EGR tube, not a rough idle, but I did get some useful information anyway. It turns out that the consensus on the egr tubes is that a lot of them are loose, and i...
1991 Chevrolet C1500 Cheyenne 5.7L Stall VIN: 2GCEC19K8M
replaced dist. problem went away thanks to all of you deeply apreciate all your help
1999 Chevrolet C1500 LS 5.7L Mechanical VIN: 2GBEK19R1W
Well, I recieved so many responses that I could not answer them all so I will thank everyone here. The problem turned out to be some rust deposits outside of the rear wheel cylinders in the bore. When we bled the system the cups ran afoul with this rust, very ...
2002 Chevrolet Prizm 1.8L No Start VIN: IY1SK5280R
Well Im calling this one fixed. I talked with the customer yesterday and she stated there were no problems since the toyota coil was installed. I guess aftermarket coils just aren't made the same.. I keep you guys updated if anything changes. Trouble codes: P1300.
2002 Chevrolet Avalanche 1500 5.3L air blend door actuator VIN: 3GNEK13T52
Hello and thank you to all. The answer, as many stated, was that the acutator needed to be installed first. If you just plug it in, to make sure it is working. It will go to it's end and just be stuck. I was lucky enough to have borrowed a tech II and i could ...
2004 Chevrolet Cavalier 2.2L gauges VIN: 1G1JC12F04
thanks to all who helped ,,it was a bad dash cluster, replaced it and all is well all gauges working fine tach and speedo normal thanks again bill [...]
2007 Chevrolet Silverado 1500 Classic LT 5.3L MIL Lamp on VIN: 1GCEK19Z47
Well, not sure if is 100% fixed, but customer has driven 3 days with no light. Many thanks guys(especially Justin) on your responses. The light never came on after posting this originally(go figure) - We believe it may have been a connection problem at the pcm... Trouble codes: P0449.
2002 GMC Sierra 2500 HD SL 6.6L push rods VIN: 1GTHK23152
Dear technicians. We finally found the problem with this truck, even though we aren't finished with it. I recieved 5 replies on this post. One thought it might be bad injector O rings, allowing oil into the cylinders, another thought it might be caused by the ...
2003 GMC Sierra 2500 HD SLE 6.6L No Start, Stall VIN: 1GTHK29183
Well, we were checking the truck over and it started. We ran every test we could possibly run and could find nothing wrong. Wee kept the truck for 3 days, starting it, stopping it, leaving it overnight. No way could we get the thing to act up so we let it go. ...
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