× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 16, 2004
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
1988 Chevrolet S10 2.8L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1GCCT14R5J
i do not do much driveability, especialy on gm. i have this truck and it misses and loaps at idle and wants to die. when driving cuts in and out. the only thing i happend on is: if you unplug the alt. it smooths out and all symptoms are gone and runs good. tri...
1989 Chevrolet Corvette 5.7L No Start VIN: 1G1YY3180K
continuing from post on 7/07/04. hot only no start. thank all of you for suggestions. one thing im not sure on is injector ohm readings im getting. cyl 1 10.2 cyl 3 10.8 cyl 5 17.0 cyl 7 16.5 these readings at 70f cyl 1 6.1 cyl 3 8.2 cyl 5 17.0 cyl 7 5.1 th...
1991 Chevrolet K2500 Cheyenne 5.7L Mechanical VIN: 1GCGK24KOM
This is a fire truck that has only 7000 miles on it and it came in with the brake light flashing. I did the diagnostic check on the ABS and found the ECU to be bad. I replaced the ECU and noticed that the master cylinder had been leaking so I went ahead and re...
1993 Chevrolet Astro CL 4.3L Hesitation, Cuts out VIN: 1GNEL19W6P
Vehicle seems to idle fine and engine runs good, the only problem is when in acceleration above 45 mph, engine boggs down. We have attempted several differant options to no winning. Any help would be greatly appreciated.
1995 Chevrolet Blazer 4.3L lower control arms VIN: 1GNDT13W6S
cracking noise. coming from suspensions when coming out from garage with wheels about 30 deagres left or rigth louder on the dip between sidewalk and street[incline] noise there in reverse or forware any help will be appreciated.
2001 Chevrolet S10 4.3L system VIN: 1GCCS14W91
i have an 01 s10 with a brake problem.i am looking for a little help with it.we have replaced the front pads and rotors,installed new shoes and hardware.also replaced the master cylinder because of the customers complaint of a sinking brake pedal.after replace...
2000 GMC Sierra 1500 SL 4.8L Misfire VIN: 2GTEK19V9Y
Hello everyone. Thanks for taking the time to read this. This truck developed a severe missfire one afternoon. When checked found no's 3, 5 and 7 cylinder with very low compression, (30 psi). Cylinder leakage test blows air into crankcase. Looking into cylinde... Trouble codes: P0300 (Random Missfire), P0305 (Cylinder 5 Missfire), P0307 (Cylinder 7 Missfire)

Fixes & Summaries for GM
Fix/Summary Answers
1993 Cadillac Seville STS 4.6L shifting VIN: 1G6KY529XP
Fixed: Removed valve body and installed bracket Thanks to Ron with trans doc the updated solenoids came without info as to updated bracket and my tech is inexperienced in this unit the screen did come out in between solenoid
1997 Cadillac Catera 3.0L Heater core VIN: WO6VR54R9V
This heater core job is not an easy thing. heater core has 2 pipes going to it that have snap on hose connections under wiper area. the trick is to remove steering column to get dash movement, pull dash from the passsenger side, you have to get console out if ...
1990 Chevrolet Lumina 3.1L No Start VIN: 2G1WL54T4L
Well I stayed late last nite till it was fixed. It turned out to be the crank sensor.The thing I don't understand is how can a sensor that is open give the same pattern as the new sensor that has 900 ohms??? I measured the wave form with old sensor in, then re...
1996 Chevrolet C1500 Cheyenne 5.7L Poor Idle Quality, MIL Lamp on, Transmission slips VIN: 2GCEC19R5T
Well we sent this truck to get the Transmission overhauled. One of the Clutch Pack Drums was broken causing it not to have anything higher than 2nd gear. When we got the truck back and test drove again over night the P0108 code never came back on. So i am figu... Trouble codes: P0108 (MAP Sensor Circuit too high), P1106.
1997 Chevrolet Astro 4.3L all gauges VIN: 1GNDM19W8V
The van would not malfunction once it was brought to us, rechecked all connections & attempted our best to make dash fail - with no success. I just dont know how much trust we can put in the aftermarket rebuilders? Hopefully a lot.
1998 Chevrolet Blazer 4.3L Transfer Case VIN: 1GNDT13W1W
thanks for your replies.turned out to be tccm.all is fine everyone happy.
1999 Chevrolet Lumina 3.1L Surge VIN: 2G1WL52M1X
this one is finally fixed.fix came back around to the 24x crank sensor that we replace with delco.pulled crank pulley back off and saw sensor mounting ears cracked (and yes sensor was torqued to spec).sensor mounting ears had raised area around bolt hole.the s... Trouble codes: P0336.
2000 Chevrolet Express 3500 5.7L MIL Lamp on VIN: 1GCHG35R1Y
As it turns out, the problem was an open ground wire from the sensor to the pcm. I replaced the complete wire from the sensor all the way to the pcm, I figured this was much easier than opening up the harness. After the repair, everything worked great. I got a... Trouble codes: P0140 (HO2S B1S2 Insufficient activity).
2001 Chevrolet Blazer LS 4.3L ABS module VIN: 1GNDT13W51
Thanks to all that help on this Blazer. Clean wheel sensor,& electric plug in EBMC, Clear the code, & the code has not return.
1996 GMC C1500 Sierra SL 5.0L Brke petal VIN: 1GTEC19M5T
Thanks for the feed back. we tested syst by clamping all lines & petal stayed the same. rechecked rear drum adj, ok, we went ahead and replaced booster( could hear a small vac leak with brakes applied). Nothing we did changed brake petal, When i said antiloc...
1989 Oldsmobile Cutlass Calais 2.3L Misfire VIN: 1G3NK14AXM
The Olds runs fine. 99% of the replies said to replace the coil cover. We installed a oem cover and coils, connectors and springs. Started up without the miss and all is well. Most replies stated that much of the time a real visible problem can not be seen, as...
1999 Pontiac Grand Prix SE 3.8L MIL Lamp on VIN: 1G2WJ52K4X
Well unfortunately this was one I had to let go. I unplugged te MAF sensor and the misfires went away. I ordered a new AC Delco MAF and the misfires came back. I checked the wires in the MAF plug and all connections appeared to be clean and tight. Sorry guys. Trouble codes: P0300 (Random Misfire).
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next