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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 2, 2004
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1993 Buick Skylark Custom 3.3L No Start, Cuts out, Stall VIN: 1G4NV149PC
Have had this car for 2 weeks, it dies after driving about 20 or 30 min, originally the car sat for about a month and then would not start, had the crank senor replaced and the coils then would start and die after the time period. Have tried disconnecting tcc,...
1997 Buick Century Custom 3.1L passkey VIN: 2G4W552M0V
hello fellow techs, car in for a no start last week found battery original and very dead, cranked over and started after battery replacement. charging systm checked and returned to customer. returned on tow truck on monday for a no start. found no voltage to ...
1999 Buick Century Custom 3.1L Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 2G4WS52M5X
vehicle came to shop for check engine light with stumbling and stalling. placed vehicle on scanner - found trouble code po300. replaced spark plugs and spark plug wires with ac delco. replaced tps. let customer have vehicle back. vehicle back in shop one week ... Trouble codes: P0300
1995 Cadillac Fleetwood 5.7L fuel gauge VIN: 1G6DW52POS
The car has a digital instrument cluster, and the fuel gauge moves up and down, fuel level has no bearing on condition. I inspected all conections & grounds. No problems found.The amount of movement is from empty to full.
1984 Chevrolet Camaro 5.0L enfine
ok guys this car was going down the road when suddenly it just started knocking. very loudly. if i disconnect the cylinders the knock does not change like a rodbearing knock normally does. it is a steady loud knock at idle but if you bring up the rpms and let ...
1986 Chevrolet Corvette 5.7L MIL Lamp on VIN: 1G1YY07836
code is hard, if cleared comes right back, tried two maf sensors, maf is reading at idle 4 g/sec airflow is reading at idle 116 g/sec these are supposed to be the same, iac counts are at 0, unable to find a vacuum leak so far. this one has been here for a lon... Trouble codes: 33 (maf sensor or circuit too high)
1992 Chevrolet K1500 Cheyenne 5.7L interior lights 4x4inop VIN: 2GCEK19K7N
checked to see if wires were piched or cut or smashed and the wires look good but the dome lights stay on and the 4x4 dosent work it keeps blowing fuses
1995 Chevrolet Caprice Classic 5.7L inop temp gauge VIN: 1G1BL52P3S
1995 LT-1 caprice. Coolant gauge inop. Has New GM sensor, New GM connector and wiring checked. Grounding the sensor does make the gauge move ok. But is still don't work!! Coolant and clean and there are no blockages. I have a 160' s'tat but the gauge will not ...
1996 Chevrolet Lumina 3.1L long crank time VIN: 2G1WL52M6T
This car came in for long crank time. Customer reports this has been going on for some time. It seems worse when the engine is warm. It will crank for sometime then start and die or idle rough, if it dies it will long crank again if you give it some gas it wil...
1997 Chevrolet K1500 Cheyenne 5.7L engine noise VIN: 1GCEK19R5V
This truck came in that had a noise in the engine. it sounds like a piston skirt or wrist pin noise. It is very loud when cold and gets quiter when hot. The noise is there for about 3 minutes when cold. When hot it is faint when you rev it and it sounds like a...
1997 Chevrolet K3500 Cheyenne 7.4L Poor Idle Quality, Surge VIN: 1GCHK33J9V
After installing distributor vehicle wouldnt strat.Marked dist when we removed it like Shop-key says and replaced with out turning motor over .Dist dropped in just like it belonged and then would not start. Brought motor to TDC used cap to find #1 on dist drop... Trouble codes: P1345 (crankshaft/camshaft position sensor correlation)
1998 Chevrolet K1500 Cheyenne 5.7L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2GCEK19RXW
This truck has a rough idle all the time. The o2 sensor B2S1 seems to be stuck at 0.35v. LT fuel trim on Bank 2 is 25%. The truck had Bosch wires and uknown cap and rotor on it so we replaced it with AC Delco parts along with a new set of AC Delco plugs. The f... Trouble codes: P0300 (Random Misfire), P0153 (HO2S B2S1 Slow Response), P0174 (Bank 2 Lean)
1999 Chevrolet Silverado 1500 5.3L 4 X 4 and Directionals VIN: 2GCEK19T5X
This truck is / was a builder !!! It has a 5.3 V-8.NEW BODY STYLE. This truck was put together and was driven for a month before anything went wrong. The customer frist stated as he was leaving work one night the truck stalled,and would not restart right away,...
1999 Chevrolet Express 2500 5.7L starter VIN: 1GCGG25R5X
worked fine until customer had it a half a day then the starter engaged everytime the key was turned on. when we got it the starter is working fine. the relay is'nt stuck and no volts are present to trigger relay until start is selected. anyone seen this befor...
2001 Chevrolet Silverado 2500 6.0L Vibration VIN: 1GCHK29U31
vibration started after the yoke and ujoints were replaced. the vibration starts at about 73 mph and stops about 85mph the transfer case was rebuilt, the drive shaft has been balanced at two different driveline shops, but still the same problem. removing the t...
2002 Chevrolet Silverado 1500 5.3L Starting VIN: 2GCEK19T22
truck does not crank.battery is fully charged
2001 GMC Savana 2500 5.7L daytime running lights VIN: 1GTFG25M51
The vehicle was towed in for not running and a burning smell. The daytime running light is burnt out again and the fuse #4 was blown We replace the fuse and the vehicle ran. This fuse is for the gauges and supplies power to the daytime running light module. I...
1994 Oldsmobile Silhouette 3.8L Stall VIN: 1FHDU06L7R
vehicle shuts off at idle, sometimes. owner complaint; dies during drive, (i suspect it is on deceleration. using "genisys", recorded stall and viewed data stream, all looks normal. cam/crank error is normaly 2, sometimes 3. i replaced crank sensor per other p...
2001 Oldsmobile Intrigue GX 3.5L No Start VIN: 1G3WH52H61
Good Morning, Here is one to contemplate: this vehicle has an extended crank time after a hot soak of 20 to 40 minutes. Starts perfect cold. I have been chasing this for 2 months and you can see by the related repair history, I have been over this thing a cou...
1992 Pontiac Bonneville SSEi 3.8L Gauges VIN: 1G2HY521XN
Good Day to you "Tech's United", I have a set of nervous gauges. Oil pressure jumpy and 15 lbs inaccurate, Temp Gauage Jumpy and 40 degrees inaccurate, Boost Gauge jumpy but seems to be accurate. Trace all basic grounds and connections - Tried Known good inst...
1999 Pontiac Grand Prix GTP 3.8L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire VIN: 1G2WR1215X
This one has got me stumped. Intermitanly the engine will stumble very hard. When this happens, the lights flicker, the a/c compressor turns off, the alternator pattern flat lines, the ECM response by opening the IAC more. Once this happens everything stablize...
2001 Pontiac Montana 3.4L cruise control VIN: 1GMDX03E51
hey guys i need a little help with this problem. we have checked the basic items, also have followed the mitchell on demand flow of diag. the scanner shows that it had code 1585- cruise control inhibit output circuit, and also in test mode that the cruise inhi...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Regal LS 3.8L passlock VIN: 2G4WB55KXY
To fellow iatn members, I would like to thank everyone for the helpful information that i have recieved. I have repaired the vehicle by reprograming the Theft Deterant system... THANK YOU, Ernie [...].
1990 Cadillac DeVille 4.5L ebcm VIN: 1G6CD5337L
We have not solved this one. For now the customer is going to drive the car the way it is. It looks like we woule have to replace the main valve unit and it is worth more than the car. We would not be sure that would fix it. We did not get much help on this on...
1994 Cadillac DeVille 4.9L MIL Light Code 91 VIN: 1G6KD52B6R
Most of the replies I got related to either 1) a problem in the adjustment of the switch, 2) bent or damaged shift linkage that would move the switch in some erratic fashion, or 3)loose pins in the PCM connector where it plugged in the PCM itself. I checked al...
1988 Chevrolet Celebrity 2.5L aldl scan
Sorry about that delay guys been backed up some thing fierce here Celebrity problem may or may not be fixed , we replaced the ecm and customer has not been back, thanks dave
1993 Chevrolet K3500 Silverado 6.5L Excessive Emissions VIN: 1GCHK33FXP
Thanks for all the replies, the best one was dye in the oil. we did that check and did verify oil bypassing the tubo. Thank You Lanny [...]
1995 Chevrolet Tiltmaster 5.7L Stall, MIL Lamp on VIN: 4KBB4B1A4S
Thank you all that replied. I will say 6 out of 9 replies hit it right on. It was the distributor. I checked the pick up and found Cracked magnets just like you guys said I would. I also found huge amounts of corrosion around the module. I called the dealer fo...
1998 Chevrolet Express 1500 5.7L drivetrain VIN: 1GBFG15R4W
And the noise was a -- DRIVESHAFT! We had a lot of input but this was one of those 1 in a million. Remember, for every rule there is an exception to that rule. We learned a lot about driveshafts which we have posted here. Most every one believed that it had to...
1993 Pontiac Firebird Formula 5.7L remote door lock VIN: 2G2FV22P6P
i got very good info about this the modual is the biggest suspect thanks to all who replied
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