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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 7, 2007
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Open Help Requests for GM
Help Request Answers
2001 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP54K91
Hi to all. I have a problem child here, Customer called and said battery appeared dead on his car, He purchased a battery and installed, No start. Towed to shop. I find it first of all has no interior lights and when key is placed in ignition it said,unknown d...
2001 Buick Century Custom 3.1L unsure VIN: 2G4WS52J16
hello all. this car came in with low coolant lite on & lifter type noise. lower intake gaskets were replaced for coolant leak. while intake was off, all lifters were replaced w/ac delco parts. after reassembling, start engine & no change in noise. i am aware o...
1993 Cadillac Fleetwood 5.7L Pass key indentify VIN: 1G6DW5278P
Anyone have any reason why this voltage would be this high???
1965 Chevrolet super sport 396CID Alignment VIN: 166675F136
can any one supply front alignment specs. for this vehicle.By the way it is a two door super sport convertable.And this customer is very precise about this one.
1988 Chevrolet S10 2.5L Poor Idle Quality, Cuts out, Stall VIN: 1GCBS14E4J
This truck is acting very strange when cold it will start and stall or surge and run rough until it stalls. It seems to run pretty well once it warms up though. One thing I have found is that when its cold and running bad if you unplug the MAP sensor it will c...
1993 Chevrolet K3500 Cheyenne 5.7L input \ output speed VIN: 1GBHK34K5P
I am posting this for a trans shop friend of ours. This truck has the speeds (input and output) backwards on the scanner. The connectors are NOT swapped. Idle in park the out put will show engine speed. The PCM has been replaced in the past for rough running, ...
1995 Chevrolet K2500 Cheyenne 7.4L Clutch VIN: 1GCGK29N0S
The vehicle came in with a very hard clutch pedal and complaint of grinding during shifting and that the vehicle would continue to move in reverse with the clutch pushed in. After verifying the complaint and checking the hydraulics, we removed the trans and fo...
1996 Chevrolet Monte Carlo Z34 3.4L engine temp gauge VIN: 2G1WX12X5T
Temp. gauge on dash will peg at 260 then immediately drop back down to middle of gauge.customer says this happened right after his friend put an aftermarket water pump in to correct a noise concern. since that repair the customer has replaced the pump again al...
1997 Chevrolet Tahoe LS 5.7L compressor VIN: 1GNEC13R2V
We have tahoe no a/c.full freon no power to a/c cycling switch at accumulator.checked all fuses ok.when you test the dark green wire with test lite comppressor comes on.hook up scanner and a/c request is YES.on output controls we can comand a/c relay on and co...
1998 Chevrolet C1500 Cheyenne 5.0L Heater Core VIN: 1GCEC14MOW
I have replaced the heater core (dealer part) four times. They last on average 5 weeks. I have used cooling system treatment for electrolysis the last two times. No rust in coolant.I know this is an electrolysis problem, but don't know how to find and correct ...
2000 Chevrolet Express 2500 5.0L No Start VIN: 1GCFG25M7Y
greetings to alli have this van when it lays over night the first start of the day is a difficult one.the coolant sensor reading is accurate.long story short i installed a fuel pressure gauge and my reading while vehicle is cranking i got a reading of 55 pound...
1988 GMC G2500 Rally 5.7L Oil in Cooling System VIN: 1GTEG25K8J
I bought this Van for my Son!Didn't check it out throughly enough,prior,So now I kicking myself for buying it! Intially it had Milky Transmission Fluid ( Radiator was shoved back and twisted on Right Side)So I replaced Radiator,Knowing it would have to be Tran...
1993 GMC C1500 Sierra 5.7L Misfire, backfires
Car towed in with no oil. rods and crank are gone. start it up you can hear it. Put new GM Goodwrench 350 in it. new oil cooler, hoses, exhaust manifolds (old ones where warped) radiator, water pump, everything. started it up and ran great. revved it up and it...
2004 Pontiac Montana 3.4L High Idle
I have two Montana vans that are recurring nightmares for me. On both vans the customers complain of intermittent high idle. Both customers have said their vans will do 40-45mph without touching the gas pedal. I have never been able to duplicate the condition ...
2003 Saturn Vue 3.0L dash lights electric steering VIN: 5GZCZ63B83
customer arrived with vehicle stated dash lights on no power steering occasional hard start scan computers no communication with bcm but ecm, tcm, air bag computers all had comm error codes checked bcm power and grounds all ok. cust states this all started aft...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KEE57Y1
Yes this Caddy is fixed! 3 replyes suggested computer relearn, they were correct, the used unit was programed for calf. emissions. The car ran fine with it just set the air pump code. Thanks to all for your help! Trouble codes: P0412, P0418.
1985 Chevrolet S10 2.5L No Start, Cuts out VIN: 1GCBS14E8F
Many great & helpful replies, the fuel pump was just too weak to build any pressure (had about 2 psi on the guage) replaced the pump and fired right up. Thanks to all who took their time to help.
1995 Chevrolet Cavalier 2.2L Fuel leak VIN: 1G1JF52475
Hey guys , thanks for all the replies you gave . Customer never did return with vehicle , so i couldn't test anything else . They just continue to drive without fuel cap .We did however carefully check the routing of the lines and the connections , they were c...
1996 Chevrolet Camaro 3.8L Poor Idle Quality, Surge, Cuts out, Stall VIN: 2G1FRP22K1
the problem was the pcm installed new pcm and problem solved
1996 Chevrolet Cavalier 2.2L starts & dies VIN: 1G1JC1248T
Replaced Ignition switch . Replaced Inst cluster. Cleared codes & releared system.Still starts & dies . Any other ideas??? Trouble codes: P1629.
2000 Chevrolet Cavalier Z24 2.4L No Start VIN: 1G1JF12T4Y
thanx for all your replies this one is fixed ended up finding ignition swich burnt replaced but then had to deal with security issue light not going out they had car towed to dealer and they fixed that up with programming
2000 GMC Savana 2500 5.0L steering box/pump VIN: 1GTFG25M9Y
still having the stiff steering also checked all lines and hoses for restrictions none found problem seems to get worse as vehcile heats up well thanx all for the sugestions and will update if and when fixed
2002 Oldsmobile Intrigue GX 3.5L Hesitation VIN: 1G3WH52H92
on the 02 intrege we found the code was set because of a bad deverter valve coustomer declined to fix also had a bad fuel regulator thanks for all your help Trouble codes: P0410.
1998 Pontiac Grand Am SE 3.1L gauges, instruments, climate controls, radio VIN: 1G2NE52T4M
Well guys, this one won't come back to let me fix it. In my customers defense the problem seems to only act up intermittantly every few days or so then it runs fine without a hitch. My customer has had to cancell several times because it just won't do anything...
2000 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NF12T6Y
thanks for all the help guys turned out to be a bad fuel pump driver in pcm, replace pcm and have it programmed to vehicle, starts everytime now and runs great. Trouble codes: U1000 (Class 2 serial comm prob), U1040 (Loss of EBCM / EBTCM communications), P0336 (CKP Sensor A 18/24X outof range), P0340 (Cam Pos Sensor Problem), P0440 (Evap System Fault), P1632 (Theft sys fuel disabled).
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