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Prev Professional Automotive Repair Technical Discussions for January 16, 2006
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Open Help Requests for GM
Help Request Answers
1999 Buick LeSabre Custom 3.8L Misfire
I have replaced spark plugs--still have miss fire on #4 tried new wire and new coil. scoped the wire secondary pattern is way different than the ones firing good..Question is can the ign module cause a miss fire under load but fire good at idle? it really sou... Trouble codes: #4
1996 Cadillac Fleetwood 5.7L pass key fault VIN: 1G6DW52P8T
ok guys another nut to crack.should be easy, but i cannot find all the components that need to be tested.this caddy came in for a no start and the battery was dead so i told the apprentice to put a new one in it.he did.now i don't know if this was doing this b...
1988 Chevrolet Celebrity 2.8L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 1G1AW51W6H
Hello team ! A good 2006 to all, we started whith this strange case car has a rich mixture in idlle, we have tested all the components whith no result, we have suplied gas from an independent gas pump and problem remains the same, what we donīt understand is w...
1994 Chevrolet Cavalier RS 2.2L Power locks VIN: 3G1JC5146R
I have a customer with this Cavalier and his auto lock feature all of a sudden stopped unlocking the doors after an ignition cycle. I've seen hundreds of these where this system was not working properly, but this is the first guy to actually want it fixed! I h...
1995 Chevrolet Camaro 3.4L cooling system VIN: 2G1FP22S6S
Cutomer brought this vehicle to us for coolant in oil cond. we performed all nornal tests, pressure test, chem. block test, ect found no problems, other than coolant in oil. So we removed upper intake and valve covers for a looksee, nothing. install pressure t...
1996 Chevrolet S10 4.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCCS14XOT
This S-10 has been misfiring since the guy has bought the truck with 50,000 mi. 3yrs ago. He has had it to many shops. When I started to look at it the truck would misfire on rainy days only. Look at the cap and rotor they were pretty corroded so we replaced t... Trouble codes: P0300
1998 Chevrolet Corvette 5.7L column lock VIN: 1G1YY32G1W
The battery went dead on this vehicle from sitting for a few months. We had it towed into the shop to recharge the battery, and replace the supercharger belt which had broken due to a bad water pump. We also replace the water pump. The problem is since reassem...
1998 Chevrolet C2500 Cheyenne 5.7L tcc pwm VIN: 1GCGC29RXW
code 1860 (tcc pwm ckt ),Truck runs good , will go into lockup 0 - 10 slip, will stay engaged for miles, as soon as it comes out of lockup DTC sets , PCM won't enable lockup again untill codes cleared, Thanks in advance for your time. note : flash at another s...
2001 Chevrolet Astro 4.3L fuel gauge, VIN: 1G1DM19W71
Problem is very intermitten, I have tested communication wires and checked scanner movies looking for any specific data change. The transmission does leave stops in third gear at times, however this too is intermitten. The ENG/TRANS codes are p0740 - TCC solen...
2001 Chevrolet Silverado 2500 6.0L oiling VIN: 1GCHK24U11
hello got a nether problem here checked oil pressure 60psi hot, engine has very little oil coming out of pushrods this thing is rattaling badly. looked at old head gaskets 2 the new ones there wasnt any difference. ordered all parts direct from g.m. also looke...
2003 Chevrolet Cavalier 2.2L fuel gauge VIN: 1G15H12F03
This Cavalier has a temp gauge that reads too high all the time. When the key is first turned on the temp gauge reads at aprox 170 deg., the scanner said 55 deg and the infrared said 57 deg at the coolant temp sender. The coolant temp sender seems to be workin...
2003 Chevrolet Silverado 2500 HD 6.6L Tow/Haul Mode VIN: 123F122986
See info below
2004 Chevrolet Silverado 2500 HD 6.6L speedometer VIN: 1GCMK23234
we have had several truck come in different year and different mileages, when the customer is driving the speedometer goes to 120 miles per hour. we have driven these trucks and never had it act up on us.
1996 GMC K1500 Sierra SL 4.3L Hesitation, Stall, MIL Lamp on VIN: 1GTEK14W8T
vehicle displays engine random misfire for codes, as well as a couple of t.p.s codes,scope checked vehicle as well a scanned system .Whenever the vehcle is started and accelerated it will misfire just off of idle,and a misfire code will initiate,according to b... Trouble codes: P0012, P1122 (t.p.s circuit open or shorted), P0300 (random engine misfire)
2004 GMC w5500 6.5L Parking lights VIN: JKXW654X44
Looking for help with wiring Dig. This ig a G.M.C inport my MITCH only has G3500.
1999 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NE52T6X
hello-this grand am with a quad motor was towed in-you crank it over and if it starts it backfires thru the intake and misses-code in the computer is p0300-plugs are wet-coil boots are burned-so we thought this would be slam dunk- two new coil packs with boot ...
2000 Pontiac Montana 3.4L MIL Lamp on VIN: 1GMDX03E4Y
Replaced gas cap( Cheap CYA ) , canister purge and vent solenoid, customer drove car through 2 drive cycles and code (p0440) is back. Check over visualy for leaks, while checking, pulled lines at canister and noticed raw fuel coming from canister at small line... Trouble codes: P0440
2003 Saturn Vue 2.2L fill fluid VIN: 5GZCZ33D23
How (or where) does one FILL the transmission fluid on this vehicle? AllData says to check fluid level at specific temps (as displayed in scan data), #1 fill trans fluid until JUST starts dripping out of the "fluid fill lower tube", #2 put plug back in and add...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Buick Century Special 3.3L High cold idle VIN: 1G4AG54N4P
Appreciate the info, customer hasn't returned yet to let us take it farther. Steve
2001 Buick Regal LS 3.8L Poor Idle Quality, Cuts out, Stall VIN: 2G4WB55K41
We replaced the fuel pressure regulator. Found it leaking when the engine was shut off. Would only leak slightly when the engine was running. Has been fine ever since and has been starting better than ever.
1993 Chevrolet C2500 Cheyenne 5.7L line pressure VIN: 1GCGC24K9N
Thanks to everybody who took the time to help. Several of you said there is a shift kit to address issues like these so thats what we tried and I am sure we have a fix.The kit is from SONNAX called the sure cure part# SC-4L80E. www.sonnax.com
1996 Chevrolet G30 Chevy Van 5.7L Unknown VIN: 1GBJG31K6T
Thank you for all the help. We tried flushing the brake fluid. Changing to Gm brake shoes, springs etc, but to no avail. The problem still occured. We hooked the lab scope up to the three wheel speed sensor inputs. The two front waveforms looked terrible, but ...
1998 Chevrolet K1500 Cheyenne 5.7L cd player VIN: 2GCEK19RGW
thanks to all for input, I am telling customer to replace cd player with aftermarket if they want it fixed. thanks again.
2000 Chevrolet Tracker 2.0L heater core VIN: 2CNBJ13C7Y
Well Its has been two weeks since I posted this and I had gotton some great replies. First let me say that the car has no aftermarket radios,cell phones, remote start etc. I had also been installing AC Delco heater cores. The heater core also had corrosion at ...
1998 GMC K1500 Suburban 5.7L No Start VIN: HYU8765443
thanks one and all the problem was the fuel pump as every body suggested. thanks again happy new year
1992 Saturn SL1 1.9L Poor Idle Quality, Misfire VIN: 1G8ZH5497N
Thanks for all the replys. Found the intake gasket leaking very slightly around cyl 1 and 2. Not enough to make a difference in the way it runs... but O2 volts change pretty quick to .9 volts. Customer does not want to change gasket at this point. Not sure if ...
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