Join Now
International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 24, 2008
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for GM
Help Request Answers
1987 Chevrolet Corvette 5.7L instrument cluster VIN: 1G1YY3182H
It seems this is our week for blown bulbs in the instrument cluster. NOBODY locally seems to be able to find us the four little bulbs that illuminate the cluster on this '87 Vette. Jim Kidd Service Manager
1988 Chevrolet S10 Blazer Sport 2.8L engine VIN: 1GNCT18R6J
hi I change the engine for a rebuilt one from a rebuilt shop.ihave got no vacum leak,collant sensor new, iac new, ignition module in distributor new, batterie new, starter rebuilt good power and good grownd. when engine is at normal temp, i turn the steering ...
1997 Chevrolet Blazer 4.3L ABS Module VIN: 1GNDT13W0V
Vehicle came in with codes C0261, right front wheel speed sensor or circuit. C0265 ECU malfunction. Cleaned the ground for the front speed sensor and fixed that. When checking for C0265, there was only 4 volts going to the ABS unit. Replaced the connector at t...
1999 Chevrolet Monte Carlo LS 3.1L abs VIN: 2G1WW12M9X
abs is activating on normal stops at hyway speeds there are no codes present and all speed sensers apaer to be reading the same acording to snap on scanner
1999 Chevrolet Blazer 4.3L blend door VIN: 1GNDT13WXX
Vehicle came in for climate control stuck on constant heat, found actuator reciving constant signal to go to full heat, Even in manual mode can not change actuator function, tested all temp sensors, power wire and grounds to actuator, even plugged in known goo...
1999 Chevrolet Astro 4.3L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Poor Fuel Economy VIN: 1GCDM19WXX
Vehicle has poor fuel economy, surge when driving. misfire at times. can not get the service lite to come on even tho unplug all sensors. problem occurs at anytime, hot or cold. problem intermittently. replaced .. fuel pump it fail prussure test, fuel filter...
1999 Chevrolet Silverado 1500 4.3L Hesitation, Misfire, MIL Lamp on VIN: 2GCEC19W1X
This truck is sluggish on accel. and misfires at cruise. Iv removed the fuel pump there was slimmy darkgreen stuff on the filter of the pump so I replaced fuel pump and cleaned gas tank. Truck still has 50 psi of fuel pressure at fuelrail and 65 psi at the lin... Trouble codes: P0300
2000 Chevrolet Impala 3.4L wipers VIN: 2G1WF55E7Y
The wipers will work on low or high intermittently but will not work in delay mode. When the wipers do not work the wiper motor will make a "hum" noise. Sometimes when in high or low mode they will stop at any location, and sometime when shut off the wipers wi...
2002 Chevrolet Silverado 1500 4.3L Misfire, MIL Lamp on, Hard Start VIN: 2GCEC19W82
Came in with hard to start when sets overnightWhen I first checked it had codes for #5 & #6 mis-fire. We cleaned plugs & replaced wire set, Started & ran good with no miss. Let it set overnight & was hard to start when cold, but after start up it ran ok. On ro... Trouble codes: P0300
2004 Chevrolet Silverado 1500 5.3L Windshield wipers VIN: 1GCEK19T24
Tranny guy trying to pay the rent here. Customer states that he can be driving down the road and the wipers will just come on. Has not happened to me. I have Shop Key, checked TSBs and found none. Wanted to check grounds but I am having trouble finding them. S...
2005 Chevrolet Impala 3.4L No Start, no spark or injector pulse VIN: 2G1WF52E05
this car came on a hook customer said tha the day before if had stalled on him, hard but it restarted,took it home,next morning it woud not start. Checked,no spark and no injector pulse.crank and cam sensor had good signal so I checked igition module with vant...
2006 Chevrolet Uplander LS 3.5L no crank VIN: 1GNDV23L16
Customer stated vehicle will not crank over after she has driven it and stops to go in store. She states it always starts fine in the morning when the vehicle is still cool. We found the vehicle does start fine after it has been sitting. Once it is heated up i... Trouble codes: U1000 (Class two serial communication error)
1995 Geo Tracker 1.6L No Start VIN: 2CNBE1367V
Hello members!! I have a real stumper here. First time posting so bear with me. This 1995 Geo Tracker 1.6l automatic 4 wheel drive will not start. I have good fuel pressure and spark, but no injector break. We had the computer sent out to world auto parts for ...
1994 GMC C1500 Suburban 5.7L Hesitation, rich on start up VIN: 1GKEC164KR
Hello to all once again. We have this GMC Suburban in the shop that is driving us nuts. On cold or cool starts it runs real rich if you tips into the gas. Black smoke coming out of exaust. We have checked and swaped (at customers request he has two of them) ma...
2000 GMC Jimmy Diamond Edition 4.3L Poor Idle Quality, Hesitation, Surge, Stall VIN: 1GKDT13W6Y
I have done the basic tune-up (plugs-wires-cap-rotor) replaced injectors, TPS , IAC , replaced fuel filter. Vehicle stalls, seems to be getting to much gas at idle, when cold. Once warmed up, vehicle does not respond to acceleration, stubbles, falls flat, and...
2003 GMC Sierra 1500 SLE 4.3L temp at vents VIN: 2GTEC19X53
with ac on first start the truck will blow out cold air.after a 1or2 minutes it will start to blow hot air out the drivers side and middle vents.passenger side 2 vents stay blowing cold air.hope someone has run into this before.thanks for any help you can give...
1989 Pontiac Firebird 5.0L Starting VIN: 1G3K28RS55
Hello and sorry for the bogus VIN. I am at posting from home about the Firebird that came in for a no-crank. I quickly realized that this car was not recieving a starter signal, and when applying 12 volts to the small purple signal wire, the engine turned over...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Park Avenue 3.8L Drivers Vents VIN: 1G4CW52KXY
Thanks for the info guys! Did an Evac. & recharge... All is well
2003 Buick Rendezvous CX 3.4L Accessories VIN: 3G5DA03E73
Another nightmare fixed! - After finding the short that pops the fuse(see the update section below), we then found 2 light sockets that were wired wrong, which kept our interior lights on dim. How this happened we dont know. After all - it is a repo! Thanks f...
1997 Chevrolet Camaro 5.7L blown head gasket
Thanks to Neil for the help and Bill and everyone else who even answered. I dropped the subframe to put it back together. This is the only way to do it. I changed the cap and rotor, wires, plugs, radiator also, So I did more than average. you can do it in the ...
1998 Chevrolet S10 LS 2.2L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 1GCCS1948W
well as the story goes DON"T OVER ANALYZE THINGS !!! ran truck on the motor vac machine this morning to eliminate fuel system.. truck still ran the same with no change...sooooo i increased the pressure on the motorvac to 80 psi and the front o2 only raised to ...
2000 Chevrolet C3500 5.7L Poor Idle Quality VIN: 1GBJC34R3Y
I want too thank everyone for your help. Rule #1: "If it has electronic aftermarket equipment remove from system before perfoming any tests!" Rule #2: See Rule #1. I disconnected the propane controller and all readings came within spec. Truck ran great with o... Trouble codes: P123.
2004 Chevrolet Astro 4.3L serpentine belt VIN: 1GCDM19X64
2004 Chevrolet C6500 Kodiak C6C042 7.2L Hesitation, Surge, Cuts out, Stall, MIL Lamp on VIN: 1GBJ6C1C04
First of all I would like to thank all of you for your help.I receved a lost of infomation on how this system works,but most of all special thanks to JOE from Californa,THOMAS from Illinois on leading me in the right direction and giving me a phone number to c...
1994 GMC K1500 Sierra SL 5.7L No Start, Cuts out VIN: 2GTF29K0R1
RIGHT ON!! Lots of comments about dist. but John and Herman hit it on the head. I took the dist. out and used a screwdriver and was able to turn the center peice of the pick-up coil. Replaced the dist with GM dist. and run like a top. Customer was super happy...
2002 GMC Yukon Denali 6.0L ride control VIN: 1GKEK63U42
thanks for all the replies. I ended up taking it to the local gm shop to get the codes pulled with a tech2. my modis would not do it mr snapon??? ended up having a c0580 and I found the left rear shock damper solenoid shorted. some people said you have to disa...
2005 GMC Yukon Denali 6.0L Unknown VIN: 1GKEK63U15
Well, As many had responded, it was the Left front wheel bearing/speed sensor. I have experianced a lot of problems on the older chevy trucks with bearing wear causing ABS problems, just nothing like this that actually engaged the ABS. I can only assume it is ...
2001 Oldsmobile Aurora 3.5L Starting VIN: 1G3GR64H91
Car has not been repaired. 1 reply asked about a power saver-- too late. one was not utilized. Another reply stated something about an unlock code but did not elaborate. Called dealer they had no info on unlock code. We were able to bypass underhood starter re...
2000 Pontiac Montana 3.4L fuel pump VIN: 2B4GP25384
thanks for the quick response the problem was wiring harness on passenger side rocker panel had salt corrosion and had maelted together fuel pump gray wire to orange interior light wire.repaired wire all is good thanks
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next