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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 22, 2012
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Open Help Requests for GM
Help Request Answers
1994 Chevrolet S10 LS 4.3L Hesitation, Cuts out, Misfire VIN: 1GCDT19W0R
Vehicle has poor driveability when cold. At cold idle, there is a slight misfire. When accelerating from a stop, there is almost no reponse from the accelerator pedal until the vehicle speed increases. Engine cuts out and stumbles continuously until cruising s...
1997 Chevrolet K1500 4.3L No Start, Poor Idle Quality, Stall, Misfire
hello fellow techs This one was towed in from another shop. They replaced fuel pump and tank for a no start. truck would only run with accelerator pedal depressed half way and stall. checked for codes p0108 map sensor code. i had 5 volt reference. good groun... Trouble codes: P0108
1999 Chevrolet Astro 4.3L oil consumption VIN: 1GNDM19W2X
I have a 1999 Astro van with the 4.3L that is buring 2-3 quarts of oil between oil changes. There are no leaks(thats amazing I know) and I replaced the PCV valve last time it was in for an oil change just as a cheap guess to start with. The customer will be ...
2001 Chevrolet Corvette 5.7L speedometer VIN: 1G1YY22G21
I would like to thank all who reply in advance... I have a vehicle here which has had the speedometer recalibrated for larger wheels. The customer has reinstalled the factory wheels on this vehicle. Now... I need to recalibrate the speedometer back to factory...
2008 Chevrolet Aveo LS 1.6L Cuts out, Lacks Accleleration VIN: KL1TD566X8
Thanks in advance for any help you can throw my way. Customer stated car sputters and runs poor at times and has no acceleration when stepping on gas pedal . She shuts vehicle off & restarts then it works okay . Transmission light comes on on dash. We performe... Trouble codes: P0705
1999 GMC K1500 Suburban SLE 5.7L Transfer Case VIN: 3GKFK16R6X
When driving different speeds, but between 1200 and 2200 rpms typically, a roaring noise may occur. If the throttle is worked up and down, the roaring noise goes up and down. The roaring noise reacts very quickly to the throttle. The engine or vehicle speed do...
2003 GMC Envoy SLT 4.2L not cooling VIN: 1GKDS13S53
Help, this one has me stumped. when the vehicle is started in the morning the a/c works and cools. 25 low, 150 high. when you accelerate the pressures go haywire. first the pressures go to 45 low, 300 high. let off the gas and the car wants to stall and often ...
2004 GMC Sierra 1500 Denali 6.0L vent VIN: 2GTFK69U64
good morning everyone, customer came in complaint with it not blowing at all in the center vents, it will work fine on floor and defrost. is there a blend door or motor that have a problem . it is all digtal controls thanks
2005 GMC Envoy XL SLE 4.2L Poor Idle Quality VIN: 1GKET16S65
This vehicle came in about a week ago (Customer just purchased from a private party about a month ago it did not have this code then) with a P0017 cam and crank correlation error. We replaced the actuator and it came back with the same code. Went threw Mitchel... Trouble codes: P0017 (Cam and Crank correlation error)
1999 Pontiac Montana 3.4L Mechanical VIN: 1GMDX03EXX
hey guys, i need some help with this one. Customer came in on a hook, no forward or reverse gears, car won't move at all. I dropped the trans pan to see if there were any signs of mechanical failure, but it was relatively clean, except for dirty fluid. So we d...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Chevrolet Astro 4.3L power steering VIN: 1GNEL19W3X
New P/S box took care the problem. Thanks to all.
1995 GMC G2500 Vandura 5.0L No Start, Cuts out, Stall VIN: 1GTEG25H7S
ok its fixed. turns out it was only a half broken or corroded wire from the 'ecm b' fuse to the pcm. how embarassing. what i DID do- measured voltage at pcm from fuse with lab scope. what i SHOULD have done- tested same circut with test light. why? .test... Trouble codes: 12 (testing and results).
2006 GMC Savana 2500 6.6L MIL Lamp on VIN: 1GTGG25236
We found the instument cluster in the vehicle was for a gas engine and did not have any diesel circuits for the wait to start light. A new cluster with the RIGHT part number fixed it. (we had swapped out the cluster for the same part number) The customer mad... Trouble codes: P0381 (Wait to start light control circuit).
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