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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 17, 2004
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Open Help Requests for GM
Help Request Answers
2000 Buick LeSabre Limited 3.8L No Start VIN: 1G4HR54K6Y
Intermittant no crank: Customer states display reads driver unknown. Vehicle may start at which time Volts, Fuel, Temp, Radio, Power locks, Air Bag Light are on and or system is inoperative. Removed back seat to get a closer look at power feeds & problem went ... Trouble codes: C1298 (PCM loss of communications), U1016 (class 2 Loss Of communication), U1255 (class 2 Loss Of communication), P1602 (PCM loss of communications), P1626 (Security malfunction)
1991 Cadillac DeVille 4.9L No Start VIN: 1G6CD53B7M
hello again. any suggestions. my other tech put a water pump on this cad. and put the battery back in and lord behold,starts and dies. injector pulse goes away after 2 pulses.my question is, can the alarm be bypassed? or how can i reset it. the car is posessed...
1994 Chevrolet Camaro Z28 5.7L Stall VIN: 2G1FP22POR
the car runs great without any warning it dies. refires right away Trouble codes: 16 (low resolution pulse failure), 42 (est grounded/ 41- est open), 36 (high resolution pulse failure), 48 (mass air flow system failure), 46 (vats fuel enable problem 51- ecm prom error), 18 (crank signal open or no signal)
1994 Chevrolet Camaro Z28 5.7L Hesitation, bog VIN: 2G1FP32P8R
We have camaro that has a bog/hesitation only when hot. The outside temp must be atleast 70 degrees. This thing has had all kinds of sensors replaced and fuel pump. The customer has been battling this for a couple of years, car stored for the winter. We heated...
1998 Chevrolet K2500 Cheyenne 7.4L Hesitation VIN: 1GTGK24JXW
This is my first post. Hope someone can help me. I have this 98 K25 P/U with a 454 SFI. Replaced the PCM due to injector 8 wasn’t firing bad driver. After that I noticed that when driving up a small hill barely pushing on throttle it flutters, hesitates like a...
1999 Chevrolet Astro 4.3L vent control VIN: 1GBDM19W6X
I am trying to find a R&R procedure for the vent control valve inside the dash. Mitchell doesn't show a location or procedure for this van. If someone with alldata, chilton, or even a GM service manual could look for me, I would appreciate it.
1999 Chevrolet Blazer 4.3L shifts to fast VIN: 1GNDT13W7X
i am posting for my trans guy ,this is a 4l60e trans and it shifts to quick.this trans will go through all four gears in under 30 seconds.all selenoids replaced ,also ecm ,output speed sensor ,i have seen them start in third ,but never shift so quick,all selen...
1998 GMC K3500 Sierra SL 6.5L Cuts out VIN: 1GDJK34F5W
i have this 6.5 diesel that cuts out,starts again rite away.never happens for me though. i have installed a new fuel filter, a new lift pump,old was no good,flushed the tanks for dirt.installed a new fuel cut off solenoid.no codes.can a crank position sensor d...
1990 Oldsmobile 98 Regency Brougham 3.8L Misfire VIN: 1G3CW54C0L
Greetings to all of you great techs in the internet void. I'm looking for some serious help with this car. when it came in, it had a serious idle problem, and backfire. found damaged wiring to IAC and then after repair, the pcm wouldn't control idle. replaced ...
1999 Oldsmobile Aurora 4.0L Stall, MIL Lamp on VIN: 1G3GR62CXW
Hiya Fellow Tech's, I Have this Aurora That goes crazy with loss of data codes I Have checked grounds, and for any other damage. when i clear the codes it takes about a day or so for them to come back. It dosent over heat or miss, it runs great. the TCM CAL ID... Trouble codes: 1604 (LOSS of ICP SERIAL DATA), 1605 (loss of hvac serial data), 1603 (loss of sdm serial data), 1602 (loss of abs serial data), 1276 (vart sdl circuit or signal), 1275 (pcm to ebtcm communacation problem)
2001 Oldsmobile Aurora 3.5L power steering effort VIN: 1G3GR64H31
Hi guys, We received this Aurora in on Saturday. Customer states that steering effort increases intermittently at idle. Vehicle is equipped with magna steer speed sensitive steering. Tested with tech II amperage draw on control solenoid when steering is hard ...
1990 Pontiac Firebird 3.1L starts and stalls VIN: 1G2FS23T7L
This car will start but stall right away. we went though and recked the customers work. all ok If you dont let the ign. switch return all the way to thew run position after starting it will idle (not real great ) Just for fun I pit another distriibutor in it a...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Cadillac Seville SLS 4.6L no 3-4 shift VIN: 1G6KS52Y7R
the used trans we installed was bad and had the same problem as the first one. we replaced trans and works just great. thanks
2003 Cadillac Deville 4.6L Valve Problem #3 Cylinder Exhaust Valves
I want to that the techs that replied to my request. Chris from Michigan hit it right on the head. The issue was a broken exhaust valve spring. Being that the car is under warranty and I have a ZERO comeback policy, the engine was dropped out of the car for di...
1995 Chevrolet K1500 Cheyenne 5.7L Misfire, BACKFIRE VIN: 1GCEK19K8S
I want to thank all of you for the help on this truck. we replaced the ignition module with an oe delco, ran top engine cleaner thru the engine and the mysterious gremlin seems to have dissapeared!. Again thanks
1996 Chevrolet K3500 Cheyenne 7.4L Unknown VIN: 1GCHK34J2T
Hello group, I'm sorry for the hold up on this vehicle. There was no hurry on this vehicle,so I had to put it on the back burner for a while. I received 13 replies on this truck and all were excellent replies. The most common reply was ignition switch proble...
1986 GMC G1500 Vandura 4.3L flywheel VIN: 2GTCG15N7G
Thanks for all the replies. I found ithard to describe the problemand I think some of you misunderstood my problem so alot of the help was not very helpful but I blame myself not you guys. The converter pilot will slide into the crank. Dowel pins and mounting ...
1993 Oldsmobile Bravada 4.3L oil filter to engine adapter VIN: 1GHDT13W4P
I want to thank everyone that replyed to my request for help.too many names to list here,you all know who you are.repair commenced as follows. remove air filter and filter box under hood, also loosen clamp at power steering pump,holding oil lines, making lines...
1996 Oldsmobile Achieva SC 2.4L ipc VIN: 1G3NL12T2T
thanks to all who responded to my posting, the fix was the IPC. We found a used one and installed it but we had to do the relearn procedure twice, the first time we left the key on for 15min or so then tried to start the vehicle and it set code 1629D so we cle...
1999 Oldsmobile Aurora 4.0L tcc VIN: 1G3GR62C8X
I wish I could call this a fix, but after showing the owner all the really well thought out responses I received, he'll likely take it to the dealer. We did pull the pan and found nothing that looked like debris from the TCC lining. Very clean. Tried some synt...
1996 Pontiac Grand Am SE 3.1L No Start VIN: 1G2NE52M2T
Well thanks to all who gave me adivce on fixin this puppy... to summerize the responses i checked the gas to see if it was flammable...and yes it was...the exhaust was not plugged...i had pulse width at the injuctors...i replaced BOTH crank sensors. Checked fo...
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