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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 3, 2008
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
2001 Buick Century Custom 3.1L odometer and shift indicator VIN: 2G4WS52JX1
This car came in the shift indicator does not light up nor does the odometer. the owner had gotten a different cluster from a salvage yard and aked me to put it in for him. I did and still had the same problem. I can't find which wires I should be testing that...
1989 Chevrolet S10 4.3L Excessive Emissions, Hesitation, Stall, Poor Fuel Economy, MIL Lamp on VIN: 1GCGT19Z7K
Runs rich on slow down and floods and dies. Data display all looks good except stays in clear flood mode all the time.No vacume leaks found since replaceing the T body gasket.
1990 Chevrolet LLV 2.5L No Start VIN: 1GBCS10E9M
tis is a post office right side drive delivery vehicle. i have not been able to duplicate this problem but the driver claims after he shuts the vehicle off during his deliveries and lets it sit for 10 or so minutes, the vehicle will not start again until he le...
2001 Chevrolet Silverado 2500 6.0L Cam bearings VIN: 1GCHC29U91
Can anyone verify the cam bearing oil hole orientation on these things? I recently rebuilt the 6.0L in my brother's 01 Silverado - all new bearings, rings and gaskets. I ran into a problem replacing the cam bearings. The oil feed holes in the block are between...
2002 Chevrolet Silverado 2500 HD 6.6L trans pressure switch manifold VIN: 1GCHK23112
need some help w/an 02 2500hd- will not stay in reverse- code po876 sets- reverse "R" on dash indicator blinks- replace pressure switch manifold (w/filters)- forward gears okay- no slipping. Thanks
2002 Chevrolet MedDutyTruck 5.7L MIL Lamp on VIN: 4KLB4B1R02
This truck came to us from a fleet's own shop where they had just installed an aftermarket reman engine. The other engine had broken the crankshaft. This engine came with the oil pan and front cover installed. On the first test drive they got a flashing check ... Trouble codes: P0300
2004 Chevrolet Impala 3.4L speedometer VIN: 1G1SL87L63
this car came with an inop speedo.i replaced the speed sensor on the trans and it worked fine on the lift.but once i took it for test dive it stopped working.im hoping someone out there ran into this problem.any help would be appreciated that would be great.th...
2005 Chevrolet Silverado 1500 LS 5.3L power steering VIN: 2GCEK13T95
Old friend from out of town stopped in with low power steering at idle. He said backing up with an empty trailer was hard to do. As we checked it out and problem went away while checking over front end, so we flushed fluid with GM fluid. Cannot find any electr...
2005 Chevrolet Silverado 1500 4.3L mainteance VIN: 1GCEK14XX5
I am embarrassed to post this but I need help to get the job done. On routine maintenance the coustomer asked to change the fuel filter and the local parts store had one so I said I will change it. I can not find it and I have a hoist to pick the truck up too....
2007 Chevrolet Silverado 1500 WT 5.3L very high idle VIN: 2GCEK13M77
this truck came in with a P0121 code (throttle position correlation problem),so we changed the throttle body,we got a new unit from the dealership,now the problem we are experiencing is that the idle is very high (2800 rpm) and some times it will come down to ...
2007 Chevrolet Silverado 2500 HD Classic WT 6.0L Poor Idle Quality, Hesitation, Surge VIN: 1GCHK29U67
original complaint was cutting out and loss of power on this truck. I checked for codes and didnt find any. tested fuel pressure and it is at 60psi and flows about 15oz in 15sec. i could not duplicate complant, but after talking with customer we replaced fuel ...
2000 Pontiac Grand Prix GT 3.8L abs VIN: 1G2WP12KXY
this vehicle is getting a code for right rear speed sensor circuit. i replaced the bearing test drove and light came back on, scan tool reads normal same mph as other sensors . also the tcs off light comes on soon as you start vehicle if you push the button an...
2001 Pontiac Grand Am SE 2.4L Misfire VIN: 1G2NF52T51
Misfire on cyl #1 and #4. I was wrong to asume it was a bad coil, as they share the same coil pack. Replaced with new one and still the same misfire. Checked the coil cover to make sure that there is not continuity between #1 and #4, and there is not. Plugs ar...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP54K2Y
Hello everyone, the fix was the lower intake gasket. After posting for repair help I went to the effected cylinder and pulled the spark plug out. Once I pulled the plug out I found traces of coolant on the plug. Replace the lower intake gasket and called the c... Trouble codes: P0300, P0306.
1998 Cadillac DeVille 4.6L Cooling Systems VIN: 1G6KD54Y7W
Thanks to all. The vehicle is not repaired but the diagnosis has been made. The solution was quite simple. Replace the heater hoses and refill the cooling system. Fill the oil and transmission fluid. Look to see which one goes down. It was oil. After abou...
1997 Chevrolet K2500 5.7L No Start VIN: 1GCGK24R2V
THANKS EVERYONE!!! THIS TRUCK WAS FIXED AND THE CUSTOMER WAS VERY HAPPY!!! The problem was just as yall suggested it needed a NEW FUEL PUMP and strainer (I had already replaced it but it was with a cheaper one), who would have thought that it mattered but it d... Trouble codes: 1345 (cam and crank coilation).
1998 Chevrolet Cavalier 2.2L ac control VIN: 3G1JC1246W
1999 Chevrolet Silverado 1500 5.3L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 2GTEK19T7X
Great help eveyone, the crank sensor was the problem. Wow ckp sensor is fun to remove after years of rust build up on the block (Thanks to northen Michigan). Trouble codes: P0336.
2001 Chevrolet S10 2.2L Hesitation, Cuts out VIN: IGCCS14541
Thanks for the replies, the TPS fixed it, i never did get it drop out when i was looking at it and the one time it acted up for me it sure seemed like more than TPS issue. Trouble codes: P0122 (TPS sensor cicuit low/short).
2001 Chevrolet Silverado 2500 HD 6.6L Poor Fuel Economy VIN: 1GCHK29191
thanks to all 6 replies. some say no special tools needed, some say yes. the customer was so mad at gm.(he was out of special warrenty policy by 4 mo. (mileage was in) gm refused to help). he traded for new 08 ford f-350 6.4 diesel. thanks fellow iatn menbers
2002 Chevrolet S10 LS 4.3L MIL Lamp on VIN: 1GCDT13W12
Thanks for the suggestions. I decided to go back over what I had already checked. Apparently the MAF I tried had the same problem as the original one. A reman. MAF solved the problem. I thought it was odd that two MAF sensors had an identical problem. The scan... Trouble codes: P0101 (MAF does not agree with caculated value), P0131 (B1S1 O2 lean), P0137 (B1S2 O2 lean), P0151 (B2S1 O2 lean).
2002 Chevrolet Impala 3.4L Accessories VIN: 2G1F52E529
Thanks all who replied. Your help has great. The problem is coming from the BCM. I have ordered a reman from the dealer and will be installing it as soon as it come in. Thanks again.
2002 Chevrolet Impala 3.8L Poor Idle Quality, Cuts out, MIL Lamp on
Well we did not really fix this vehicle. It did set all monitors except for catalyst. Customer will bring back when he has some more time and more money to put into the car. I think alot of you are correct when saying only a OEM convertor will work. Hopefully ... Trouble codes: P0420.
2005 Chevrolet Silverado 2500 HD 6.6L coolant VIN: 1GCHK23235
well, it seems like there is a difference of opinion on this subject. this vehicle is out of warranty so we have left the final choice up to the vehicle owner. we did advise him to put in ford gold coolant because it is something we stock. i own a 3500 with th...
1990 Oldsmobile Cutlass Supreme SL 3.1L Poor Idle Quality, Surge VIN: 1G3WS54TXL
I'm going to call this a fix, but I think it was more of a relearn situation. For the people who wrote in to help, thank you. I was asked about base idle, it had not been tampered with, the IAC was at 15 while idling in gear and would change when load applied....
2009 Pontiac Vibe 1.8L Fresh Air Recirculation VIN: 5Y2SM62843
I replaced the actuator and it solved the problem. Thanks for the help!
2002 Saturn Vue 3.0L No Start VIN: 5GZCZ63B62
after the customer told me "the rest of the story" that it started cutting out and died after wife filled up the tank. i drained the fuel tank and replaced with fresh clean fuel, it started right up. ran fine at idle but would not accelerate. stalled out but w...
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