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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 4, 2007
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Open Help Requests for GM
Help Request Answers
1992 Buick LeSabre Limited 3.8L brakes VIN: 1G4HR53L3N
On this buick only the left front and right rear brakes work and the pedal is very low. Throws codes 21 25 26 31 33 37 45 61. The rears are adjusted and all the linings are good. The ABS light has been on for a while but the customer brought it in because the ...
1992 Buick LeSabre Custom 3.8L Poor Idle Quality VIN: IG4HP53L2N
#3and #6 cyl misfire at idle,tried another coil pack and module,scope pattern seems to show 8 or 9 firing lines at idle on scope,raise the rpm up to 2000rpm scope shows 6 firing lines and miss seems to go away.Let engine come back to idle miss comes back.you c...
1998 Buick Regal LS 3.8L Stall VIN: 2G4WB52K9W
Thanks in advance to all for the help! Got this one from another shop trying to help out an older lady! Cuts out at times, usually turning or slowly cruising. Starts back up most times, sometimes won't stall for weeks! Owner had the car at the Dealer and they ... Trouble codes: P1626 (vtm)
1998 Buick Riviera 3.8L No Start, MIL Lamp on VIN: 1G4GD2210W
When car is in "no start" mode and key is released from crank position, Tech 2 still shows 25 engine RPM. Fuel pump continues to run and injectors pulse slowly, just like its running at 25 RPM. Removed cam sensor to inspect for magnet- OK. Performed crankshaft... Trouble codes: P0336 (Crankshaft Position Sensor Performance), P0341 (Camshaft Position Sensor Performance)
1998 Cadillac DeVille 4.6L whistle VIN: 1G6KD54Y7W
this caddy has a whistle from the intake at idle. very high pitch and annoying. doesnt seem to affect driveability. no codes, fuel trims ok. spraying intake with carb spray doesnt seem to change anything, so i cant say for sure if its external leak, or perhaps...
1995 Chevrolet Corvette 5.7L No Start VIN: 1G1YY22P9S
I sure could use some help here...usually I'm giving help, this time I'm asking...I'm getting mine handed over to me on this one. It has spark,fuel pressure, but very random(at best)injector pulses.Sometimes just one per crank cycle, sometimes several, but ran...
1996 Chevrolet Cavalier 2.2L brakes VIN: 4GIJF32TOT
car originally came in for thumping noise in rear...changed rear shoes, hardware, hoses, wheel cylinders, and drums...has abs light on, has ets light on, and sometimes traction light on...came back then found front ball joint bad...replaced ball joint...also c...
1996 Chevrolet Corvette 5.7L engine compartment VIN: 1GYY2256T5
I am investigating the cause of an engine compartment fire that appears to have started on the right side of the engine. Has anyone ever seen a 1996 Corvette engine fire or any knowledge what may have caused it? The fire was reported as starting at 4:30 am whi...
1998 Chevrolet K3500 Cheyenne 5.7L rear brakes VIN: 1GB5K3R5WF
The axle seal was leaking and soaked the shoes so I replaced the brake shoes. While the truck is in the air with the axle out I adjust the brakes. When they barely touch the brake will all the sudden jam. I'll spin the drum backward and it will release. I'll s...
1999 Chevrolet Blazer 4.3L 4wd VIN: 1GNDT13WXX
i have checked all that is possible with out pulling trans cant find a good digram either ive about had it with this trk can any one shed some light please the motor is 700.00 dealer only the only code is motor ciur. ground fault
2001 Chevrolet Silverado 2500 6.0L Airbag light VIN: 1GCHK29U51
Hope a GM tech can help. I've got this 2500 that the airbag light is on, there are no codes, we can communicate with the module but it will not give codes, if you unplug a sensor it will then give you a code for that sensor. Plug it back in and clear the histo...
2006 Chevrolet Impala LT 3.5L Starting VIN: 2G1WT58KX6
This car came into our shop for a winter check up. We found battery to be leaking. Replacing the battery we hooked up a battery saver and had the car in neutral. Now we have no BCM comm. Key is now stuck in the ignition with no crank and no body controls opera...
2006 Chevrolet Impala LT 3.5L heater VIN: 2G1WT55K66
Car has poor heat at idle, good heat driving down road over 1500 rpm, no leaks, system holds pressure, has new thermostat, radiator cap, has been air bled, new stat made it a little better heat all around but still poor at idle Thanks for any help Joe
1996 GMC Yukon SLE 5.7L No Start VIN: 1GKEK13R7T
Doesn't this just have to be an ECM - or are we missing something...?
1999 GMC K1500 Suburban SLE 5.7L Transfer Case VIN: 1GKFK16R5X
Hi folks-I'm looking for ideas on a noise in my own suburban. Its a creeking/popping noise that seems to be coming from the back end of the trans or the transfer case. It happens whenever torque is applied like starting from a stop or coming to a stop or going...
2002 GMC Sierra 2500 HD SL 6.6L Gear range VIN: 1GTHK23162
When you shift this truck into gear (reverse or Drive) it will go into gear just fine and start to move, then it kicks to neutral and the range indicator on the dash starts to flash. It only does this on occasion and usually if you shift to park and back to ge...
2003 Pontiac Grand Am GT 3.4L abs code c1226 VIN: 1G2NW12E03
customer states lites come on when driving. the code is for a 8 mph speed difference on r/f sensor. scoped sensor which was fine same amplitude as the others. replaced sensor to eliminate intermittent sensor fault. Was beginning to think customer was spinning ...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Park Avenue 3.8L engine VIN: 1G4CW52K7W
I want to thank everybody for their help. I checked the pcv system and everything was fine. So I did what was suggested by one person; I pulled all the plugs and used the GM top-end cleaner by filling the cylinders with it and letting it sit for a couple of da...
1985 Chevrolet Astro 2.5L No Start VIN: 1GCCM15E2F
sorry for the delay on this close, i replaced the distributer but still no injector pulse,traced wiring back to the ecm,checked all grounds and connections.customer decided it was time for a new van...i don't blame him!! thankyou for all the help on this night...
2001 Chevrolet Malibu 3.1L No Start, VTD flashing VIN: 1G1ND52JX1
I'm calling it fixed for now, although it is/was very intermittent by nature.. I replaced the previously new replacement ignition lock "sensor". All circuits tested good, and both the switch/harness and the lock-sensor had been replaced 5 months prior. We warr...
2002 Chevrolet Impala 3.4L no low beams VIN: E029169502
this one is done thank everyone for there replies. i follow the blue ground wire from the front were they join the two headlights to the ground. expecting to find it there or that the battery ate through the wire. there is a connector in front of the ip junct...
2003 Chevrolet Impala LS 3.8L security lamp VIN: 2G1WH52K03
thanks for all the replies, replaced the bcm, problem gone.
1999 GMC Jimmy SL 4.3L No Start VIN: 1GKDT13W8X
Thanks to all to replied, I agree that the pump is the problem, But I can not confirm due to the customer declined repairs. He says he would like to tackel this himself. We will see if it returns? Thanks again and Merry Christmas. Todd [...] Trouble codes: N0NE.
1999 GMC Yukon Denali 5.7L 2-3shift VIN: 1GKEK13R1X
Hello everyone, I apologize for not closing this request at a sooner time. I ended up going for the pcm. I went with an aftermarket, they took the vin programmed it and sent it out. All i had to do was the 30min relearn process and she was up and running. ...
2002 GMC Savana 2500 4.3L rear lights VIN: 1GTGG25WX2
we have fixed this vehicle and want to thank the 13 who responed and put me on the right track .I tried to thank each person as i read there email but a few i could not send out . the fix was 2 new complete rear socket assb. and their wiring harness. they cost...
1991 Pontiac Grand Prix SE 3.4L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy VIN: 1G2WJ14X3M
Well, After going around and around with the customer, I tracked down the company he ordered the injectors from. As I stated in related repair history, the injectors were replaced with the engine. I have a habbit of ohm testing injectors when installing new en...
1994 Pontiac Firebird Formula 5.7L cooling system VIN: 2G2FV22P4R
yes it was overheating at idle , air dams were all in place , the customer told me it was all stock but the fans came on at 231 , all the air bleeds were there and yes i bleed the system many times and found no air in system we replace the thermostat and the t...
1998 Pontiac Sunfire SE 2.2L ABS Module, ETS Light, Air Bag Light... VIN: 1G2JB5241W
First off thanks to the techs that took the time to help me. Using symptom based diagnosing and identifix archives, I determined I had a serial data problem. I did eventually pull a DTC from the ABS module. C1255 Internal Failure. The diagnostic procedure (ide...
2000 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NF52T3Y
thanks to everyone who replied as it turns out the oil pump needed to be replaced after replacing the oil pump the vehical still didnt start (still no compression) i cranked for a while hoping to get the lifters to unpump to no avail new lifters are 300 bucks ...
2001 Pontiac Bonneville SE 3.8L No Start VIN: 1G2HX54K81
As many of you stated before...go back to the basics. A new started solved the issue.
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