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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 30, 2009
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
1994 Cadillac Eldorado Touring 4.6L Starting VIN: 1G6ET1298R
I have a no start condition with this car it will turn over but only run for about a second. I was looking into the VATS system and found the pellet in the key is open. I was trying to find out how I determine which key I need for replacement for this car any ...
2000 Cadillac Seville SLS 4.6L Hesitation, Misfire, MIL Lamp on VIN: 1G6KS54YXY
Customer recently had head gaskets completed. After a few months of running well car intermittently will misfire badly and buck, jerk, backfire, and set codes. Has been to a few other places before me for this problem. Apparently will start and run after sitti... Trouble codes: P0352 (Ignition coil 2 control circuit), P0353 (Ignition coil 3 control circuit), P0355 (Ignition coil 5 control circuit), P0358 (Ignition coil 8 control circuit)
2002 Cadillac Escalade 6.0L stability system
Hello everyone. So I have been banging my head on this Escalade and need help. Comes in with service stability system on. Pull dtcs- found code c0286 MPA switch circuit code. I did some basic power and ground checks- nothing found. I seen GM has an updated MPA...
2004 Cadillac Escalade ESV 6.0L Ride Control VIN: 3GYFK66NX4
I am suspecting computer but has checked operation and found no problems
1968 Chevrolet C10 Pickup 4.1L gas gauge VIN: CS148J1549
This truck came to me after sitting idle since 2001. One of the problems I had to repair was a contaminated gas tank and corroded gas tank sending unit. I cleaned the tank and installed a liner and replaced the oe sender with a new 1 from Year-one. My problem ...
2000 Chevrolet Blazer LS 4.3L Hesitation, Misfire VIN: 1GNCT18W6Y
Hi all. Got this Blazer in with a miss or hesitation under heavy load, such as climbing a hill while accelerating. Ran with a fuel pressure gauge on the windshield and it maintains 60 psi through the event. I did replace the fuel filter anyway as it was origin... Trouble codes: P0300 (Random missfire)
2000 Chevrolet Tahoe 5.3L premature ABS VIN: 1GNEK13T6Y
This started out as an easy fix. Or so I thought! It would actuate ABS at slow speeds. At least you could feel the motor running. Brakes were also almost metal to metal, so we replaced them. I took the sensors out on the front cleaned and sanded the mounting s...
2000 Chevrolet S10 2.2L Excessive Emissions VIN: 1GCCS1947Y
hello IATN members, I'am at lost in this one, this truck failed the smog inspection due to high nox, this is anon EGR equipped vehicle, like I said, after some diagnosis, of curse we checked engine compression, it is goo and even, my fuel pressure is a little ...
2002 Chevrolet Trailblazer LS 4.2L Poor Idle Quality, Stall VIN: 1GNES16S62
The vehicle concern is surge and die at idle after initial start up when cold. After the engine has sat for about 3 hours and the system is relevant to outside temprature the car will start rev up to about 1100 rpm's and then after a seven second period of tim...
2003 Chevrolet Impala LS 3.8L Hesitation, Surge, Cuts out, Misfire VIN: 2G1WH52K83
Original complaint was Mil flashing. Only p0300 stored. Missfire counter shows all cyls with some missfire, but most on cyl 3. Engine will not rev past 3800 to 4000 rpm. It acts like the rev limiter is cutting in. Starts out ok, but as rpms increase the power ...
2004 Chevrolet Silverado 2500 6.0L steering VIN: 1GCHC23134
hello truck guys,have this 04 duramax diesel.I replaced all front end parts few months ago,replaced reman gear box from dealer,new pump from dealer,alignment is done.when the vehicle is stopped in park I can turn steering with no problem(works grate)as soon as...
2004 Chevrolet Silverado 2500 HD 6.0L No Start VIN: 1GCHC29U94
when the truck came in i plugged in the tech2 and found that i could not communicate with the srs, body and ipc. all the other systems would respond. the instrument cluster was blank so i had another cluster in the shop and when i plugged this in i was able to... Trouble codes: U1000
2005 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 1G1JC12F85
Car came in last night for MIL on, p0128 found. customer has taken car to pep boys for this code 3 times in the last six months, each time they said they had to replace the stat. car was at normal temp when it came in and customer couldn't leave it but is retu... Trouble codes: P0128 (coolant thermostat)
2006 Chevrolet Trailblazer LS 4.2L door locks VIN: 1GNDS13S46
hi all you GM techs, this truck came in with door locks not working from the key fob,and the lift gate lock would pulse when it was open. did diagnostics from mitchell,found bcm bad, replaced AND programed new bcm w/ tech 2 now door locks work intermittently f...
1989 GMC C1500 Sierra 5.0L Dash gauges and headlights/turn signals VIN: 2GTEC14HUK
Ok,guys,I have an electrical problem on this 1989 c1500 truck.What happens is that when i turn the headlights on,the dash gauges jump a little.If i turn the dash dimmer switch all the way up and turn the headlights on,all the dash gauges go all the way left.an...
1996 Oldsmobile 88 Royale LS 3.8L lifter noise VIN: 1G3HN52K1T
Sorry this is so long. In July this car developed an unusual noise at the rear of the engine and a loss of power on acceleration. it ran like the cat was plugged. Had 18deg knock retard. Unplugging knock sensors ran perfect, but with the noise. It was a faint ...
2001 Oldsmobile Alero GL 2.4L Poor Idle Quality VIN: 1G3NL52T31
This car came in for a leaking fuel press. regulator. We also noticed that idle was high so customer said to go ahead and fix. Have replaced IAC motor, new motor actually made idle increase even more. Check tps with scope, normal. Checked for vaccume leak, non... Trouble codes: P0122, P0420, P0440 (Evap fault), P0530
1996 Pontiac Sunfire SE 2.2L MIL Lamp on VIN: 3G2J35249T
The only way the code will clear is to disconnect the battery, connect the two cables together and let set for a minimum of 1 hour. The system shows no leaks and both vent & purge valves respond to commands. Both valves were replaced with new to verify they we... Trouble codes: P0440 (Canister Purge system fault)

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Regal LS 3.8L Surge, Cuts out VIN: 2G4WB52K32
Yes, I was hitting the limiter in park. It would engage at 3 grand.Most had replied plugged exhaust, that and the restriction may force EGR to open.We swapped out the EGR valve,and dropped exhaust.Still there. I unplugged the MAF sensor and drove it, and had n...
1994 Cadillac Seville STS 4.6L Coolant missing VIN: 1G6KY5291R
Thank you so much for every one spend time to read and give us advise. We sure it is the head gasket blown but the cost is more than the car ! So the customer will think about it. I think he do not want to repair it. So we think case close and one again thanks...
2003 Cadillac Escalade 6.0L aux temp actuator VIN: 1GYEK63NX3
Sorry to report but the customer never brought the vehicle back in... Thanks to all that tried to help though. If the customer does bring it back in i'll update the help request
2003 Cadillac Seville STS 4.6L oil pressure VIN: 1G6KY54993
Thank you for all the replies. I replaced the oil pump. Crank pulley has never been off this vehicle and it was tight when I removed it, so that was not the issue. I changed out the oil pressure testers also. Initially I was using a friend's from another s...
2003 Cadillac DeVille DTS 4.6L abs VIN: 1G6KF57983
We originally used an aftermarket hub assembly on this vehicle. Most of the posts advised using the factory (Delco) parts instead. The customer is out of town for an extended period of time, but when he returns, that is probably what we'll do.
1991 Chevrolet Corvette 5.7L Cuts out, Stall VIN: 1G1YY2383M
thanks for all the replys it was the injectors 6 out of 8 was bad jsut replaced them all and now the car runs great
1993 Chevrolet C2500 Silverado 5.7L Excessive Emissions, Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 1GCGC29K2P
Thanks for all your help. We did put a ground directly on the O2 sensor port. The truck failed to duplicate problem for the 2 days we had it. Customer took it home yesterday and no problems. Thanks. Trouble codes: 45 (rich exhaust).
1996 Chevrolet K1500 Silverado 5.7L axle actuator
thanks to all that posted fixes ( jason,shaharazad,cor and chris) turned out to be 2 problems instead of one. the first problem was found to be a faulty driver in the control module and the second one was the encoder motor itself.
2000 Chevrolet Silverado 1500 LT 4.8L abs module VIN: 1GCEK19V2Y
replaced l/f bearing and all is well, and for the info that concerned me as far as the vehicle speed staying at 3mph with the truck stopped this is apparently normal... odd to me but thats what the foreman at a local dealer told me so i'll take it as truth
2003 Chevrolet Impala 3.8L Lighting VIN: 2G1WH52K33
I put another BCM in and I stayed awake when programing It,everything is ok.Just have to find another impala with a bad bcm and doesn't have fog lights .Thanks ALOT.
2005 Chevrolet Silverado 2500 HD 6.0L mode door VIN: 1GCHK29U15
Thanks everyone that responded to my request. took the mode door motor off and checked the door it was kinda stiff to move. but freed up after moving it. reinstalled the mode door motor and it is now working good for over 2 weeks also replaced the harness and ...
2005 Pontiac Grand Am SE 2.2L theft alarm VIN: 1G2NE52F75
Always ask the customer if they are using the correct key. That will open up a very interesting dialogue with the customer. Thanks to everyone that replied.
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