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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for June 15, 2005
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Open Help Requests for GM
Help Request Answers
1969 Buick Riviera GS 430CID MAster cylinder? VIN: 494879H945
The brakes grab intermittently. Sometimes work ok, but are very touchy. Sometimes they grab so hard it locks up. I would like to know if someone out there has any pressure specifications for this brake system. They are drum brakes front & rear, & adjustment se...
1997 Buick Park Avenue 3.8L Blower motor VIN: 1G4CW52K5V
Greetings GM techs...This car came in with three problems that seem to all be related. 1. Battery was dead, 2. Blower motor keeps running at a very slow/barely turning speed w/key off, and 3. Water on passenger side floor. Unplugged the drain for the evaporato...
1997 Buick LeSabre Custom 3.8L convertor lockup VIN: 1G4HP52K5V
I did a stupid thing,now I need your help.I put a torque convertor and the Sonnax regulator valve in this thing.The gasket tore on the separator plate so I took it off to scrape the gasket and removed the little screens and the black (check valve??) but I didn...
2001 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP54K91
We have had this vehicle in the shop twice, it shows evap emission on scan tool but there is a check fuel cap lamp on also. Any help would be appreciated...
1953 Chevrolet 3100 3.9L points VIN: H53L010059
help i need point gap and dewell and timing spec.s nothing in alldata or mitchells thanks duane
1988 Chevrolet S10 Blazer Sport 2.8L Hesitation, Stall VIN: 1GNCT18R2J
on accel car looses all power goes to stall unless i release gas pedal and accelerate again this is pretty much the same symptoms the vehicle arrived with all though o2 sensor was not switching now it works fine car also sat for about two years before customer...
1992 Chevrolet C1500 Cheyenne 4.3L brake light VIN: 1GCDC14Z7N
thanks in advance to everyone. maybe someone has had one like this before, if so please help !!! i suspect it may have a bad brake module, but i would like your opinions before i replace it. the customer tells me the brake light has been coming on at 40 mph si...
1994 Chevrolet Lumina APV 3.1L Stall VIN: 1GNDU06D3R
Hi Group, Need your help on this one, vehicle came on the hook, no start, so I checked the basics, all seems to be ok, good sparks, fuel pressure and injector signal. Engine was flooded, so I replaced the plugs and did an oil change. Now engine will start but ...
1994 Chevrolet S10 4.3L Poor Idle Quality, Surge, Stall, Misfire VIN: 1GCCS14WXR
This vehicle came in from another shop with a poor idle, misfire,surging and stalls. Initial inspection turned up an open plug wire and badly worn plugs. After tuning up car it ran better but still has intermittent misfire at idle, kind of like a cylinder drop...
1998 Chevrolet C1500 Cheyenne 5.7L No Start VIN: 2GCEC19R1W
Good Evning All Customer states that last year during summer truck would not start at times unless he added fuel to throttle valve. was ok all winter till about a month ago then same thing. well on arrival was running fine and starting ok once it did seem t...
1999 Chevrolet Metro LSi 1.3L engine oil VIN: 2C1MR2229X
hello, i am working on the local parts store parts delivery car. car came in with oil light on, checked oil level, was fine. so i pulled out the sending unit and installed a manual gauge. would not budge the gauge at idle or when i rev it. check the operation ...
2000 Chevrolet Silverado 1500 5.3L #3 and #4 cyl. VIN: 2GCEK19T8Y
major engine miss in 3 and 4 cyls.scan shows random misfire in both only.excessive fuel.coils and injectors are firing.compression test is fine.leakdown test is good.pulled valve covers on both,all good.valve springs and rockers are good.checked for leaks arou...
2000 Chevrolet Suburban 1500 5.3L No Start VIN: 1GKEC13R4X
Hello Techs, we have checked every thing on this vehicle without disabling it to run. Is their a way to check the fuel regulator without dismantling, once we keep cranking it wil finally start and continue to start and run fine all day. It acts up[no start whi...
2000 Chevrolet Silverado 2500 6.0L Surge, Stall VIN: 1GCGK29U3X
Hello all.I am posting this for another shop.Truck came in with complaint of low idle 400-500RPM slight surge and sometimes stalls at intersections.Code for TPS was set.They changed TPS,that fixed code.Still has same symptoms so they changed IAC.No better.Fuel...
1998 GMC K1500 Sierra SL 5.7L No Start, Poor Idle Quality, Misfire VIN: 2GTEK19R0W
Here we gooooooooooooo!!!. This truck had an intake leaking really bad. It was unknown about how much it overheated. Replaced the intake gskts and it had a rattling noise when started. After further testing the owner wanted a reman. I pulled the engine, cleane...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Buick Regal Custom 3.8L MIL Lamp on VIN: 2G4WB54L4P
Thanks to all that replied found wiring prob at bulkhead car is out front waiting to be picked up! this is one of the best tools I have . Thank You to all!!! Trouble codes: 41 (cam sneson sig.).
1997 Buick Park Avenue 3.8L Poor Idle Quality, VIN: 1G4CV5219V
Hello all, ended up being the final 3 injectors. replaced all is well, thanks to all that replied.
1999 Buick Park Avenue 3.8L warning lights VIN: 1G4CW52K9X
Hello, thank-you to all replied. The problem on this vehicle could not be duplicated again in 5 days, so the customer took the vehicle and will return when the problem is more regular. When the vehicle returns I will post it again when we have the fix, and I t...
1998 Cadillac DeVille Concours 4.6L HVAC doors? VIN: 1G6KF5496W
I would like to thank those that spent the time to reply. I proceeded to remove the glove box and the side heater case portion of the box. Someone had previously tried to repair the connection of the lower heat door actuator rod to the door lever. They had gro...
1972 Chevrolet c10 350CID fuel gauge VIN: CCE142Z142
Hey guys! Thanks for your help!! I tested the ceramic resistor and found it had over 500 ohms. I replaced it with a 100 ohm resistor from radio shack and now the gauge reads fine! Again you guys pull through, thank you for all your help James
1988 Chevrolet Sportvan G30 5.7L Poor Idle Quality, Stall
Had several replies to this one and am sorry it took so long. The owner of the van took it and he is very busy-only leaves it for a short time each time he comes, so I have not been able to see if any of the suggestions helped. Most said that the coolant temp ...
1991 Chevrolet S10 Blazer Tahoe 4.3L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 1GNDT13Z0M
Thanks to all six guys who responded to my post. All six suggested that the pcm was the most likely source of the problem. I can't verify that it will fix the truck because customer has declined to go any farther. One suggestion was that bias voltage would go ...
1998 Chevrolet S10 LS 4.3L No Start VIN: 1GCCS19X2W
well, after replacing the passlock sensorand lock cylinder, i didn't have 12 volts to passlock sensor. scoured the circuit scematics, i found that there is a rap relay hidden under left side of instument panel. replace relay and now have 12 volts to passlock s... Trouble codes: P1626 (passlock sensor not recognized).
2000 Chevrolet Monte Carlo LS 3.4L air vents VIN: 2G1WW12E2Y
Thanks to the 2 of you who took the time out to give me a hand. As you had stated it was the vacuum line(black one). I found it broken going into the harness protector down by the right inner fender. Repaired the line and all works well. Thanks again for the h...
2004 GMC Sierra 2500 HD 6.0L converter VIN: 1GTHK29U54
Hello, this ended up being wore starter drive bushing and drive was walking into flexplate., replace starter all noises gone. Thanks to all the replied.
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