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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 1, 2004
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Open Help Requests for GM
Help Request Answers
1987 Buick Regal GNX 3.8L fluid leak at breather tube VIN: 1G4GJ1174H
thanks for reading my post. i have this grand national that has a trans leak at the top of the transmission through the breather tube. the transmission is not over full and it operates properly. the trans mission has been replaced about 7 years ago with a perf...
1995 Chevrolet K1500 Cheyenne 5.7L No Start, Stall VIN: 1GCEK14K9S
wow,this one has me stumped.this truck came in for a no start.did some basic checking,and found fuel pressure to drop off due to a leaking regulator,ignition coil arcing off of the tower to ground and vehicle in need of a tune.i replaced the fuel regulator and... Trouble codes: 54 (fuel pump relay or circuit problem)
1995 Chevrolet Blazer 4.3L Hesitation, Cuts out VIN: 1GNDT13W6S
hi all i have a problem after it warms up you can not give it any gas or it will fall on its face and pop through the exhaust and possibly die if you dont let off the throttle i checked the temp.on the manifolds for each cyl. and apears to be running lean some...
1996 Chevrolet Corvette 5.7L Temp Gauge VIN: 1G1YY22P0T
The vehicle came in with an overheating problem and the customer said that at one point the engine started to miss. We put a new thermostat and coolant, checked for a blown head gasket, found no problem. It did have a Po300 random missfire code. Hooked up the ...
1996 Chevrolet C2500 Cheyenne 5.7L No Start VIN: 1GCGC24R1T
thanks ahead of time for any responses, this trk came in w/a crank no start. cusotmer had already replaced the coil. i have replaced all other ing. related componits just becouse i had them avalable, i have done all gm service manuel truble shoot steps and hav... Trouble codes: P0336, P0337
1997 Chevrolet Blazer 4.3L Pressure Control Solinoid VIN: 1GNDT13W4V
Hello everyone, The customer complained that a few days ago the vehicle felt like it stalled at 55 MPH and then took back off without having to crank it. Then he sayed it stalled at idle a few times but restarted when cranked. I checked for codes and found a ...
1997 Chevrolet C1500 Suburban 5.7L No Start VIN: 3GNEC16RXV
Hey guys,we got this truck in on a wrecker today and it has no spark. the customers dad nas been working on it and has replaced the cam sensor in the distributer,replaced the crank sensor, replaced coil, replaced coil driver module. replaced cap and rotor. so ...
1997 Chevrolet Tahoe LS 5.7L heavy pinging VIN: 1GNEC13R1V
My wifes vehicle, when climbing a steep grade the truck pings like a banshee. Street driving no problem, full throttle starts no ping detected, just on steep grades. Any GM Techs seen a flash for the VCM or a fix for this problem. Trouble codes: P0300 (Multiple misfire)
1998 Chevrolet C1500 Cheyenne 4.3L No Start VIN: IGCEK14W5W
truck came to shop 2 years ago. no fuel pressure. replaced pump with a/c delco unit. 70000 miles later truck towed in no start. check pump. pump runs but only puts out 20psi.checked deadhead pressure still only 20psi. replaced pump with carter unit.[lifetime w...
2000 Chevrolet Impala 3.8L Hesitation, Stall VIN: 2G1WF55KOY
vehicle will start and stumble ,sometimes die occasionally will have loger than usual crank time till starts fuel pressure on spec no codes set, other times sarts as if it was new
2000 Chevrolet C3500 5.7L 4th gear VIN: 1GBJC34R5Y
Customer uses this truck for headstones and tows a trailer sometimes. He noticed a change in the 3-4 shift. Seems ok cold and then gets harsh when warm. All other shifts are same as when new. Have looked at service info and shifts are controled by the pcm and ...
2003 Chevrolet Trailblazer LTZ 4.2L door locks VIN: 1GNDS13S03
customer wants to add keyless entry... front door lock are normal wiring rear doors work off serial data. I was wondering if bcm can be reprogramed? One of my guys used to work at a dealership and he said it could be. Any ideas and help would be appreciated.
1999 Oldsmobile Bravada 4.3L 4 Way Flasher
This truck has a problem that I have seen once before and was never able to come to a conclusion of what the problem was, Due to the fact that it is not very consistant. Driving down the road the turn signal flasher will start to click but with no lights activ...
2002 Oldsmobile Bravada 4.2L remote door locks VIN: 1GHDT13S92
remote's stopped working on this bravada---customer replaced battery's thinking they were dead. i just purchased a tech 2 a couple of months ago and attempted to program fobs to no avail. ran charts per all data and mitchell -- said to replace liftgate module ...
1991 Pontiac Grand Prix SE 3.1L speed VIN: 1G2WJ54T7M
The cruise control will always engage correctly and hold speed on level ground unless at higher speed, 55mph and above. If at high speed, the cruise control will not hold set speed for long periods of time. If going up hill, the speed will drop off, 10-15 mph,...
1993 Pontiac Bonneville SE 3.8L abs light on VIN: 1G2HX53L7P
abs/traction control inoperative-dash light illuminated.code 41 rf inlet valve circuit problem.i replaced traction control switch by cosole shifter as this had been deluged with coffee and no longer worked.i also installed used ebcm and code remained.i am usin...
2000 Pontiac Bonneville SE 3.8L 1-2 shift VIN: 1GACRT1234
Car came in with intermittent 1-2 harsh shift. Transmission is 4T65E. A check of tsbs revealed a possible pressure solenoid and or valve body problem. Test driving with pressure gauge installed, the pressure drops just before shift. This seems to be the normal...

Fixes & Summaries for GM
Fix/Summary Answers
1985 Buick Regal 3.8L Poor Idle Quality, Hesitation, Stall VIN: 1G4GM47AOF
After double checking all the basics (compression,vacume,timing,ect) and changing wires,cap,and rotor (with ac delco parts) noticed car still ran bad so then I dove in to the 2 bbl feedback carb. after checking the tps and mixture control solenoid found that t...
1992 Buick Regal Gran Sport 3.8L Misfire VIN: 2G4WF14L8N
The customer took his vehicle and I have not heard from him. Everyone was helpful and I tried multiple switches from Car Quest, NAPA, Dealer, O'Rielly's none of them worked correctly in fact the dealer part would not even plug in. I thought about changeing the... Trouble codes: 34 (Mass air flow).
1996 Chevrolet C1500 5.7L Misfire, MIL Lamp on VIN: 2GBEC19R5T
Here are the responses I received, Cam/Crank sensor correlation out of adjustment. This came from 3 different techs. Said if it is more than 6 degrees in either direction, this will cause the described problem. Others were - pinched wire at bellhousing, plugge... Trouble codes: P0141 (Bank1/Sensor 2 O2 Heater Performance), P0161 (Bank2/Sensor2 O2 Heater Performance), P0172 (Bank 1 Rich), P0175 (Bank 2 Rich), P0300 (Eng Miss detected multiple cylinders), P0420 (Bank 1 Catalytic Converter Performance).
1997 Chevrolet Cavalier 2.2L drl VIN: 1G1JC1245W
Hi Techs!!! The responses I received were for wiring problems due to corrosion in the area of the battery. This was also the direction I was sent by Techs at the local Dealer, Indentifix, etc. I tested the wiring every way I could think of, visual inspection...
1998 Chevrolet C1500 Cheyenne 5.7L excessive noise VIN: 2GTEC19R1W
ok so we got the new fuel lines in and compared them to the old ones as far as how restrictive they were. we found that they werent going to make a difference and opted to not install them. the only part of the fuel sys we couldnt really check was the regulato...
1999 Chevrolet Corvette 5.7L harmonic balancer VIN: 1G1YY22GXX
sorry it took me so long to close this.the main problem was the owner wanted the repair done free when he provided the engine.we called lingenfelter corvettes and tim was very helpful and provided a detailed way to get the components back in balance.I believe ...
2001 Chevrolet Suburban 1500 5.3L power steering VIN: 3GNFK16TX1
Customer sold the vehicle Phil from New York suggested take pump apart and look for some metal on the magnet. Did not see anything on it.
2003 Chevrolet Tahoe LT 5.3L fuel gauge VIN: 1GNEK13Z33
Thanks to David, Paul, Chris, Mark, Tom, Steve and Ed...you were right on the money. The dealer was a little hesitant about replacing the sender, but they did. I called for the customer, and they were a little more responsive to me. They did admit to having a ...
2004 GMC Savana 2500 6.0L Misfire VIN: 1GTGG25U44
Hello all, sorry for the late post but I was waiting for the fuel samples to be tested.I had 5 replies in all and Paul [...] nailed it. For some reason the fuel rail was contaminated with a dark rusty metalic substance, but it was just in the fuel rail, not i... Trouble codes: P0300.
1985 Oldsmobile Delta 88 Royale Brougham 5.0L No Start, Poor Idle Quality, Stall, Misfire VIN: 1G3BY69Y2F
thanks for all of your response but customer pickup vehicle while i post my request, and had into another shop in which see indicated that the problem was fixed. said she would give me info on what repair action was. have not recieve info yet. will update if r...
1994 Pontiac Bonneville SE 3.8L Poor Idle Quality VIN: 1GZHX5215R
Well guys..Thanx for all the help...I know this car may still have a bad starter issiue...But it also has bad compression..From 125 all the way down to 80 lbs..Did a leak down test on the weakest cylinder and found not to much...Am going to pull timing cover a...
1999 Pontiac Grand Am SE 2.4L ignition VIN: 1G2NE52T1X
sorry for the long time between the post and the fix but i was waiting to see if customer came back. im not sure what i did but taking off the battery cable and clearing the code seemed to take care of the problem after i did that i had 2 time when it wouldnt ...
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