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Prev Professional Automotive Repair Technical Discussions for December 16, 2011
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Open Help Requests for GM
Help Request Answers
1996 Buick Park Avenue 3.8L Vents VIN: 1G4CW52K0T
This buick has a good heater, when I mash the vents button air blows out of the vents good, but when you head up a hill or give engine a little gas in a pull air quits blowing out of the vents and then comes back when you let out of the gas. I have checked all...
2001 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP54K51
Thanks in advance for taking the time to read this post, any help would be appreciated. 01 Buick LeSabre with 3.8 K engine code stumbles for about 10 seconds after a hot soak re-start. Have pressure tested the cooling system, looked in the intake for leakage a...
1990 Chevrolet S10 2.5L Excessive Emissions VIN: 1GCCS14EXL
The idle and cruise numbers posted are the 15 and 25 mph numbers from the dyno smog test. Problem is the nox failure. I found the egr vacuum line on the vent port for the solenoid and the foam rubber cover on the vacuum port at the solenoid and thought i was d... Trouble codes: 32 (Egr)
1995 Chevrolet Astro CL 4.3L Poor Idle Quality VIN: 1GNDM19W3S
Hi every body this truck came in for a lean condition, truck starts fine when cold , but as soon it starts geting hot and you take itfor a ride when you stop and let it idle it starts runing lean i see that on my o2 sensor readings it stays lean condition, i h...
1998 Chevrolet Cavalier 2.2L No Start, Stall VIN: 1G1JC5243W
I have a strange one here, 98 chevy cavalier, when temperatures get below 20 degrees this vehicle will start and stall after about 1 second, it will do this several times and then just randomly start and stay running until next cold soak, I'm have trouble dist... Trouble codes: P1629 (VTD no signal/incorrect), B1022 (Loss of serial data)
1998 Chevrolet Tracker 1.6L Misfire VIN: 2CNBJ1867W
Thank you in advance for any input on my problem child here. This 98 Tracker has a dead miss on #2 and idling a little high (1200). Started with basics, checked for spark, good. The spark is traveling at least an inch from cap. Checked fuel injector pulse, g...
1998 Chevrolet Blazer 4.3L 3rd gear VIN: 1GNDT13W9W
I have this blazer that they just bought and drove here from Ohio. They dropped it off for a oil change and inspection. Found transmission fluid very black and axles & transfer case fluids very dirty. Sold all fluid and a transmission flush. After performing t...
1999 Chevrolet Tracker 2.0L Engine vibration VIN: 2CNBJ18C6X
I think I may have asked for help on this one before, can't remember- it's been over a year since the customer has been in. This Tracker has severe in-gear, only, vibration. New motor mounts- mounts have been loosened and car driven to "set" engine assy in cha...
2000 Chevrolet Malibu 3.1L Stall VIN: 1G1ND52J6Y
Hello techs. This one has me stumped. Car came in with a no start. I was able to start it but it would stall and backfire. I unplugged the mass air flow sensor to see if it would improve things. I did a basic charging and starting test. The battery failed so ...
2000 Chevrolet Prizm 1.8L Poor Idle Quality, Cuts out, Stall VIN: 1Y1SK5484Y
runs terrible at idle. bogs down while accelerating at shop. airflow meter seems ok is responding,however do not have idle or 2500 rpm specs for air flow meter. veh runs much better if we richen fuel with carb spray or propane inrichment. runs super lean... fu... Trouble codes: P0300, 303 (3 missfire), 171 (lean 02 0.00 - 0.10)
2002 Chevrolet Trailblazer LS 4.2L Temp Blend Motor VIN: 1GNDS13S32
Hi all this one came in blowing hot air on left side only. Its manual air. Pulled lower cover to see if motor moves it does not. Commanded it with tech2 still does not move.checked signals to motor all good, smack it and it works so i replaced it and mode moto...
2003 Chevrolet Silverado 1500 WT 4.8L Stall VIN: 1GCEC14V13
i have a 03 chev truck that on first start up of the day it will stumble then stall or if it sits most of the day. did do a intake gasket it was leaking but did not fix problem. did check for leaking injectors let them sit over nightwith pressure on them pull ...
2003 Chevrolet Impala 3.4L oil VIN: 2G1WF52E93
I changed crack sensor and egr valve in this car brought it back to car dealer it ran fine the next morning he got in the car and it was clattering. I checked it out and there was no oil to the top of the engine so I pulled the valve cover and cam didnt seem t...
2004 Chevrolet Colorado LS 3.5L No Start VIN: 1GCDT14684
Car was towed here, no start. Positive battery cable was off. Hooked up battery, no crank. Had several codes stored in memory in the BCM, B0529, B0534, both turn signal codes, B1372 device ign 1 circuit low. B1382 device accessory circuit, B1420 Device voltage... Trouble codes: B2958 (Security system sensor data circuit high)

Fixes & Summaries for GM
Fix/Summary Answers
1994 Chevrolet S10 Blazer Tahoe 4.3L Excessive Emissions, Surge VIN: 1GNDT13W1R
Thanks so much to everyone. Some great ideas and suggestions! Turned out Kent and Bill hit it on the nose! Tight intake valve on cylinder #1. Am going to convert it to adjustable rockers using older small block nuts. Thanks again to all, and have a wonderful H...
2002 Chevrolet Avalanche 2500 8.1L No Start, Stall VIN: 3GNGK23G52
No fix yet,list of changed parts: Fuel Pump, cam and crank sensors, fuel pressure reg.,MAP. After all this there is a bigger problem now, after a tech left the battery charging over night, battery ruined but the engine is now seized cannot turn over even with ...
2003 Chevrolet Impala LS 3.8L Surge, Stall, Misfire VIN: 2G1WH55K03
well between working around the customers schedule and how intermittant this problem is i have yet to repair the vehicle and have run out of time for iatn...i will update again once i conquer this beast...thank you all for your help
2007 Chevrolet Trailblazer LT 4.2L Cold Star Up VIN: 1GNDT13S77
dropped the pan. the filter was fitting real loose in the seal to the trans. sucking air on start up? new filter seal and fresh fluid has fixed the problem. i did fail to mention fluid flush and filter was done aprox 15,000 miles ago. thanks for your help
2000 GMC Yukon SLT 5.3L Hesitation VIN: 1GKEK13T0Y
thanks for all the replies,turns out it was a problem with the maf sensor.must have been a int problem with the iat part of the sensor.installed new maf and now iat reading stays stable and accurate .
2002 Pontiac Grand Prix SE 3.1L no start
I can get it to run on starting fuel. fuel pressure hold at 50 psi after putting a new regulator on. The car still will not start.
2001 Saturn L200 2.2L Stall, MIL Lamp on VIN: 1G8JU52F31
Thank you everybody for your replies! After reading Ray's advise I checked out the ignition switch. The wiring and connecters appeared ok, but I found that the entire steering column was loose. The pin that the tilt column hinges on had worked itself loose an... Trouble codes: P1640 (Driver 1-Input High Voltage).
2005 Saturn Ion-1 2.2L Mechanical VIN: 1G8AF52F95
Good Morning ALL, Just update on Saturn. Car has been setting several day, pushed into shop and rethreadeed spark plug holes, pulled some metal when removed. Installed new spark plugs, added about 2 table spoons Marvel Mystery Oil and disconnected fuel pump re...
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