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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 8, 2010
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Open Help Requests for GM
Help Request Answers
1994 Chevrolet Astro CS 4.3L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 1GNDL15W3R
Lets start with some history. Customer somehow got water in the tank. Another shop replaced the fuel pump, drained and cleaned the tank, replaced the fuel filter, injector unit and must have replaced the distributor as well cause I didnt. When the van came to ... Trouble codes: 45 (rich exaust)
2003 Chevrolet Blazer LS 4.3L No Start, Stall, Misfire VIN: 1GNDT13XO3
Customer complained that it died when put into gear, also stated that the oil pressure and rpm gauges went nuts. It doesnt start at all for me, I checked the crank and cam alignment and are in sync.I scoped the cam and crank signals and found a glitch in the c...
2004 Chevrolet Aveo 1.6L trans shifting erratic VIN: KL1JT52674
this came in for a trans shift issue when we test drove it we felt nothing except a missfire we in stalled plugs and wires drove miss went away returned to customer it came back the next week with the same concern test drove found the speedo bouncing everywher...
2004 Chevrolet Trailblazer EXT LS 4.2L under temp VIN: 1GNET16S44
changed stats and sensor all gm came in with code 128 low coolant temp after installing multiple stats and senders still no temp can't break 110.then start motor won't start have to hold in clear flood position to get started then clears up and runs fine r and...
2005 Chevrolet Silverado 3500 6.6L battery VIN: 1GBHK39D76
truck sits for a couple days and batterys go dead. checked for draw and seems to be an excessive amount of draw. my fuse is blown to my meter so i cant get amp reading but my test light is lit up bright. have pulled all fuses and disconnected alternator but dr...
2006 Chevrolet Silverado 2500 HD LS 6.6L No Start VIN: 1GCHC23296
This truck has been an intermittent no start for several weeks. It had a recurring P0341 code and we replaced the cam sensor. It now has no codes and will not start. Fuel rail pressure is over 5k, compression is ok, fuel return rates ok, have checked signals f...
1989 Pontiac Grand Prix 3.1L No Start, Stall VIN: 1G2WJ14T4T
Install reman ECM, vehicle drove into shop, but has not started since, still have 5 volt refs...spark...fuel pressure.. 45psi...injector pulse... RPM on scanner 9999 never changes and 0 on scanner data from almost everything ???
1997 Pontiac Grand Prix GT 3.8L keyless entry VIN: 1G2WP52K5V
I have a 1997 Grand Prix that the keyless entry does"t work,but th power door locks work from both doors.Before this lady traded in this car,they sold her a key fob and remote door lock module. Still dead.Know it is my problem.There are six fuses for the BCM a...
2001 Pontiac Grand Am GT 3.4L Surge VIN: 1GZNW52E01
I have a shifting surging problem with this grand am . Customer complaint was running poor when cold. Test drove and seemed to run fine. Has no power loss. When test driving first to second seems a bit stiff. Second to third seem to happen quickly, It seems to...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick Century Custom 3.1L Hesitation, Cuts out, Misfire VIN: 1G4AG55M4R
Thanks for the replies, people. %90 said MAF, I unplugged it... got worse I tapped on it... No change I cleaned it... no help Member Alex [...], said, "Get a can of CRC MAF Sensor Cleaner from Autozone!" Fixed and Runs Beautiful! Thanks again! Eric
1997 Buick Skylark Custom 3.1L anti theft VIN: 1G4NJ52T7V
first thing is thanks for all the help...all were very good responses..the key to this repair was to notice it's patternn.. which always came back to system loosing it's stored memory..i replaced the instrument cluster and vehicle seems to work good.. again th...
1981 Cadillac Eldorado 4.1L Doesn't engage VIN: 1GAL5791BE
Thanks to all who took the time to respond. Paul told me what I needed to know regaring the location of the ADL switch. John explained why the ADL switch is necessary for thew cruise to work. Before posting the help request I had run all of the tests with t... Trouble codes: 60 (Check ADL switch).
2005 Cadillac CTS 3.6L unknown VIN: 1G6DP56795
I was unaware about indexing the driveshaft until I read the tsb sent by David from New York. Living in Ohio[the rust belt capital] I was unable to find any match marks on the shaft or flange, what I did notice was the carrier bearing sat about 1/16 away from ...
2006 Cadillac SRX 3.6L Front Struts VIN: 1GYEE63766
The front struts were locked up solid. I removed them and could not move them. I cut one open & there was no oil inside but the gas charge was still there. What was in there looked like a big hand full of putty. I took it to the Cadillac dealer & showed the he...
1991 Chevrolet Lumina 3.1L Surge, Cuts out VIN: 2G1WL54T9M
I recieved several replies about the crank sensor wiring harness, so thats where I started and as it turned out I had a chaffed wire at the motor mount portion. I replaced about one foot of wire in the harness( both yellow and purple wires)retested car and it ...
1999 Chevrolet Camaro 3.8L Wipers VIN: 2G1FP22G2X
2001 Chevrolet Malibu 3.1L Poor Idle Quality, Hesitation, Misfire VIN: 1G1ND52J21
found 4 things . removed the lifters and dissasembled and cleaned them. replaced lower injector o-ringsw/correct size, they were binding and not going into the manifold all the way. replaced new after market autolite plugs and wires w/ ac delco sets/ . Autolit... Trouble codes: P0300.
2003 Chevrolet Silverado 2500 HD 6.0L lug studs VIN: 1GCHK29U73
I informed customer of proper torque and he is having another shop replace studs and have them torqued to proper spec.
2004 Chevrolet Silverado 1500 4.3L Air bags VIN: 1GCEC14XX4
Thanks for all of the help, i went through system with the tech2 with no fix started from the begining again and found a wire that was chaffed. Problem solved and thanks to everyone for your input
2005 Chevrolet Silverado 1500 5.3L Theft VIN: 2GCEK13T45
I received the new passlock sensor today & installed. It did not come with key alarm switch. My GM parts guy can't find this switch listed anywhere. I went ahead & tried the 30 minute relearn & it worked just like it's supposed to. The light flashed for ten mi...
2006 Chevrolet Silverado 1500 LS 5.3L 1-2 Shift VIN: 1GCEC19Z66
Well, I finally have the answer to this vehicle. First off, do not attempt to command the 1-2 Solenoid with the shifter in anything other than D4. That was my mistake. I got myself hooked into what I thought was an electrical problem. Turns out it is a mechani...
1991 Oldsmobile Cutlass Ciera 3.3L No Start VIN: 1G3AL54N1M
I purchased a ECM from NAPA and a PROM from Cardone. Installed both parts and vehicle starts and runs fine and I now have communication at the DLC along with a CES light on the instrument panel. Thank you for all your help, Bob
2003 Saturn Vue 3.0L Poor Idle Quality, Stall, Misfire VIN: 5GZCZ63B03
We had the intake cam sprocket on backwards as the keyway lets you put it on one of two ways, reinstaled cam and it ran ok, also found upper intake plate leaking
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