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Prev Professional Automotive Repair Technical Discussions for April 4, 2005
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Open Help Requests for GM
Help Request Answers
1994 Cadillac Eldorado Touring 4.6L 4th gear VIN: 1G6ET1296R
Hi Everyone, I don't do much transmission work and I have never had one of these apart before. The car runs great in 3rd but if it is shifted into 4th it goes into emergency mode within a block or two and won't shift above 2nd. When that happens code PO94 sets...
1991 Chevrolet Cavalier RS 2.2L Surge, Stall, CODE 45 IN MEMORY VIN: 1G1JC54G7M
I hate to admit defeat at the hands of a Cavalier... Story begins one month ago...Car originally came in for a complaint of intermittent dying while going down the road. Could not duplicate concern so Tech that use to work here requested ICM & Crank Sensor on ... Trouble codes: 45 (rich exhaust)
1992 Chevrolet Lumina 3.1L Mechanical VIN: 2G1WL54T1N
Hi guys! I have this vehicle that has spark, injection pulse, fuel pressure, compression about 100-110 but won't start. My question is this: Is there any way of checking the play in the timing chain without pulling the front cover off? I'd really like to be s...
1992 Chevrolet C3500 Cheyenne 5.7L No Start VIN: 1GBHC34K5N
This truck came in with an intermitten no start hot. It has spark, injector pulse width, and fuel pump. I can shoot some carb cleaner down throttle body then it will start. Doesnt look like the injectors are giving up any fuel when this wont start,just a few s...
1993 Chevrolet C3500 Silverado 6.5L Mechanical VIN: 1GCGC33F0P
Good morning everyone. Hope you had a great weekend. Our client has just returned home from Florida (we're in Ontario Canada). When he arrived home, his got his truck and trailer stuck in mud, couldn't get out (tried several times) and ended up having it towed...
1993 Chevrolet S10 Blazer Tahoe 4.3L Hesitation, Surge, Cuts out VIN: 1GNCS13W6P
hi, truck came in after other shop could not fix it. it is acting like it is running out of gas, and surges only at part throttle, when you press more gas it corrects and goes fine. will do it in park reving it sometimes and it will surge up and down at about ...
1994 Chevrolet Corvette 5.7L Starting VIN: 1G1YY22P9R
We installed a heater core in this car. When we start it the car will run 3-5 seconds and shut down. It always restarts and always shuts down in 3-5 seconds. Any help would be appreciated.
1995 Chevrolet K1500 5.7L transmission VIN: 2G39S5WK6F
we installed a new rebuilt transmission and it shifts at aprox.2,00-3,000 rps the transmission is electronic so there is no shift cable to adjust the truck has always had a poor shift point the throttle position sensor was at .47 volts non adjusted but we ...
1998 Chevrolet K1500 Cheyenne 6.5L Excessive Emissions, Hesitation, Surge VIN: 13C5453S9W
This truck came in with all kinds of problems like a broken egr vent solenoid ,doubled up plenum gasket which leaked boost,very dirty maf which I cleaned thoroughly ,no vacum at all so I put a new pump plus all the parts I previously mentioned this truck hesit...
2003 Chevrolet Express 2500 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCFG29T03
Hello and thanks in advance. Got one here that I could really use some help with. Van came into shop with check engine light on. Found code 300 (random miss) and 753(tranny shift solonoid). Note #2 and #6 cylinders were showing miss-fires on snap-on scanner. S... Trouble codes: 300 (random miss), 753 (tranny solonoid)
1997 Geo Tracker 1.6L MIL Lamp on VIN: 2CNBJ186XV
I have a 1997 GEO Tracker from Hell. It constantly and continuously sets the code P0400 EGR flow malfunction I even tee'd my vac. gauge into the MAP sensor and hooked my test light into the EGR bypass solenoid circuit so I could see when the monitor would run ... Trouble codes: P0400
1991 GMC C1500 Sierra SLE 5.7L delayed & harsh 1-2, 2-3 Shift VIN: 1GTDC14K1M
My Dad's truck, towed a boat 40 miles & afterward 1-2 & 2-3 shifts were delayed & harsh. I suspect a problem with the governor circuit (screen in valve body). I've adjusted the TV cable both directions & no change in delayed shift. Any suggestions would be app...
1998 GMC Savana 3500 5.7L Cuts out VIN: 1GTHG35R9W
This vans runs poor after 30mph,scan vcm no codes.Speed signal reads 100mph then injectors shut off.idles great and revs up in park fine.Also speedometer and odometer are inoperative.I check archives but didn't see anything.Any help would be great.
1999 GMC Sierra 1500 SL 4.8L ac clutch VIN: 1GTEC14V9X
The ac clutch makes a loud screeching noise like excessive slipping when engaging at any rpm above idle, it had the same problem a year ago, at that time we replaced the clutch and coil (oem) and the noise went away. It came back with the same complaint last w...
1994 Pontiac Grand Am SE 3.1L Poor Idle Quality, Stall VIN: 1G2NW55MOR
car starts and runs fine. never acts up going down road.idles fine at first then the longer you let it idle the rpms will start falling off then it may raise a little then fall off till it gets to the point when it dies.it always restarts and drives fine but i...
1996 Pontiac Sunfire SE 2.2L Ignition VIN: 1G2JB5246T
Customer complaint was stalling at stop signs or coming to a stop car would stall.Recently AUTOZONE scanned for SES light and sold them a MAP sensor and then later a IAC motor. We scanned no faults but condition is present(half the battle). Start - Stall The c...
1999 Pontiac Grand Am SE 2.4L abs light VIN: 1G2NES2T7X
no lite on when roads are dry soon as it rains or snows abs and traction lite come on brakes work ok either way thanks dave
2001 Pontiac Grand Prix SE 3.1L 1-2 shift VIN: 1G2WK52J11
i searched the GM pontiac TSBs and found a few items related to this problem. The first was the pressure solenoid and the other was the 1-2 shift solenoid. The vehicle shifts hard especially on an upshift from 1-2 at intermittent times. There is no relation to...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Buick LeSabre Custom 3.8L cruise control VIN: 1G4HR5312P
thank you to all who replied, a new stop lamp/cruise cutout switch fixed it, best response was from ronald in iowa who gave plenty of details and specified resistance value for pass/fail, i love this IATN,
1985 Chevrolet Cavalier 2.0L No Start, unless primed VIN: 1G1JC27P2G
After backing up and retracing my steps toward the repair on this car, I found the pressure regulator to be the problem. I changed the diaphram and it starts like its supposed to now. Thanks for everyones help. I [...] its true what they say new is different n...
1995 Chevrolet Tahoe LS 5.7L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1GNEC13K1S
Thanks to everyone who responded. I was unable to try anything with the distributor. I ran out of time. The customer picked the truck up and has been unable to bring it back yet. If I ever do find out the answer, I will be sure to post it. Trouble codes: 44 (lean exhaust).
1996 Chevrolet Cavalier 2.2L running
thanks for all the help after checking every thing it was my error the crank shaft sensor oring had sliped up even thou the bolt was tight the sensor was not at the proper depth setting the code after finding this problem straightened out thanks
1997 Chevrolet Blazer 4.3L No Communication OBD VIN: 1GNDT13W9V
I am sorry for this post. What a diffenence a weekend makes though. Since I am the owner I got real busy on Friday and had one of my guys do part of the diagnosis. Well thats the problem. The step that says to disconnect the Brake module was done incorectly. H...
1997 Chevrolet Tahoe 5.7L Mechanical
At last this one is fixed! As one of you guys pointed out having problems with aftermarket wheel cylinders, I installed a set of AC Delco, bled the system and the pedal is now good. Thanks for the help and use this piece of advice, use AC Delco wheel cylinders...
1997 Chevrolet K1500 Cheyenne 5.7L long crank VIN: 2GCEK19RXV
customer came back monday saying the truck never ran so good sents he bought off e-bay. I told him we think there's still a probem with it not holding fuel pressure. with that he ok us to replace the fuel pressure regulator at a reduced rate, got pressure reg ...
1998 Chevrolet K2500 Cheyenne 7.4L No Start VIN: 1GCGK29J5W
Thank you, I finally replaced the fuel pressure regulator. I drove the truck all weekend and it started good every time. Maybe I will get more than eight mpg now, thanks to everyone!
2002 Chevrolet Express 2500 5.7L Misfire, MIL Lamp on VIN: 1GCFG25R92
First I would like to thank all the tech's that responed. I received may good idea's ,the one that fixed the van was from Kirk [...] who suggested checking the cap and rotor. there was a greenish blue goo inside the cap and all aroud the cam sensor.I replace... Trouble codes: P0300.
2004 Chevrolet Astro 4.3L RF interfere VIN: 1GNDM19X64
Have a Ham Radio friend that works for a manufacture of Ferrite Torroids. He has promised a box full of snap together Ferrite torroids and we will apply them to all wires under the engine cover and on radio leads. I did this to an early Electronic injection De...
1996 Geo Tracker 1.6L Surge, Cuts out, MIL Lamp on VIN: 2CNBJ1267T
I replaced the throttle position sensor and also replaced the coolant temperature sensor per e mail from Chris [...]. I also did add an extra ground on tps circuit to make sure there is a good ground. I never did find a bad ground or wiring. Cleared codes and ... Trouble codes: P0510 (Closed throttle position switch circuit), P0400 (EGR System).
1995 GMC Jimmy 4.3L fuel gauges VIN: 1GHS4T923S
i repalced the tank and sender from the dealer and ran new wires from the cluster and still no luck and at this time the customer does not want to spend any more money becausr the problem was not there before we installod the new parts(dealer parts)
1996 Oldsmobile 98 Regency Elite 3.8L shifting VIN: 1G3CX52K8T
thanks for all the help i found the fuse to the trans was good still i had no power to sensors so i pulled down the fuse box and found where someone had taped a radio into that line on the backside of the fuse box and it broke the wire repaired wire and car is...
1998 Oldsmobile LSS 3.8L MIL Lamp on
well guys, i would like to thank eveyone that helped me out with this problem, like evryone one said to check the o-rings repalced one was missing at the pcv valve. repaled with part # [...] from the dealer and all is well. Trouble codes: P0401 (insuffisent egr flow detected).
1997 Pontiac Grand Prix SE 3.8L fan motot VIN: 1G2WJ52K2V
most of you were correct, the ignition switch was the problem. On the manual system there is no blower motor hvac module. It is on the automatic system. I finally got the correct wiring diagrams from aldata when I called them on the phone. I know the resistor ...
1995 Saturn SW2 1.9L No Start, Cuts out, Stall, hard start when cold VIN: 1G8ZK8276S
I guess I was chasing my tail on this one... Parts I replaced were the ECT, both, one for the fan, and one for the computer/gauge and the wire harness/pigtail plug. About $50 in parts all together, and many extra hours. After clearing the codes none of them wo... Trouble codes: 27 (Quick QDM Fault), 48 (Ref Pulse Error), 71 (Coolent Temp High).
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