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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 27, 2010
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Open Help Requests for GM
Help Request Answers
1975 Buick LeSabre Custom 5.7L windows, alt, blower motor VIN: 4P67J5X151
i have a simple request,i need wiring diagrams for this vehicle.i have looked and requested all over . alldata dont send me the correct diags and no one seems to have them available.i have a short off the heater fuse, thats how its labeled on the block, but it...
1990 Buick Skylark Custom 2.3L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1G4NJ14D2L
After all the work to reactivate this car, I am coming down to the mem-cal, upon researching the mem-cal I found the one in the car was for a vin code A, but this one is a vin code D. Since the one I have is no longer avaliable can I use one of the ones listed... Trouble codes: 41 (Mem-Cal-- loose defective or incorrect.)
1995 Buick LeSabre Custom 3.8L no VIN: 1G4HP5216S
Replacing brake lines, cut lines at abs controller to remove. Before I could mark them, a helpful soul pulled them out. Can not find any info on port id,lf rf lr rr. this controller mounts lf frame rail with ports running front to rear. All 3/16 line. First an...
1988 Cadillac Allante 4.1L ABS Brakes VIN: 1G6VR3176J
This vehicle was brought to me to diagnose ABS inop situation.There are NO codes in any system.The moment you push the brake pedal the ABS symbol lights up,then goes out and says see message center.Message center says ABS disabled.No reason is given for disabl...
1992 Chevrolet S10 Blazer 4.3L No Start VIN: 1GNDT13W9N
This vehicle came in about 4 months ago with a intermittent no start after warm up. We replaced the Distrubutor and the vehicle ran fine. The customer informed me when he brought it back that it was always hard to start even after te distributor replacement. I...
2000 Chevrolet Astro 4.3L No Start, Misfire, MIL Lamp on VIN: 1GCDL19W2Y
This truck only stalls when hot. When cold starts and runs fine just now stalled after running about 25 min. will update if I have spark now Trouble codes: P0339
2001 Chevrolet Suburban 1500 5.3L Head lights VIN: 1GNEC16T21
I have this suburban with the head light dont always work. When they dont work they dont have a ground. According to the wiring diagram that i have there is a yellow wire that goes to the headlamp dimmer switch, that grounds the system. I took the dimmer swi...
2001 Chevrolet Express 1500 5.0L MIL Lamp on VIN: 1GNFG15M41
Vehicle originally came in with a constant fouling of the #6 spark plug. Found the fuel injector on that cylinder bad, dropping spray. Also found the intake manifold gasket causing an internal vacuum leak. Repaired these items. Engine actually runs great but w... Trouble codes: P0300, P0306
2004 Chevrolet Optra LS 2.0L MIL Lamp on VIN: KL1JK52Z64
This vehicle came in with a P0300 stored in memory. computer data is normal with good fuel trims and no noticeable symptoms.No miss fire detected at anytime during testing.Vehicle is in good state of tune with recent spark plugs,and filter.No other codes store... Trouble codes: P0300 (random missfire detected)
2005 Chevrolet Trailblazer LT 4.2L Diagnostic Port
2005 Trailblazer. N0 CEL, no data whatsoever from ALDL port Plugged in NYSI terminal and immediate fail due to no comms. Truck owner is good cust, known for many years, very clean, no issues beyond bearings since hes had it. Cust states that code readers nev...
2006 Chevrolet Silverado 2500 HD LS 6.0L Reduced power VIN: 1GCHC29U26
This vehicle has been setting tthese 2 codes p2135 and p0120 for the last few months intermittenly. Then the reduced power message would be displayed. We installed a new Delco throttle body, and Delco connector then reflashed the pcm. Still intermittenly but n... Trouble codes: P0120 (Tps position sensor 1 circuit), P2135 (Throttle position 1-2 correlation)
2006 GMC Canyon SL 2.8L MIL Lamp on VIN: 1GTCS14826
Car came in with low power warning on message center. We scanned computer system found code p0017. Also multiple codes in history. p060e, p0121, p2101, p2119,p2135. These history codes have not returned after reset, but code p0017 resets right away. The data s... Trouble codes: P0017

Fixes & Summaries for GM
Fix/Summary Answers
1997 Chevrolet Astro 4.3L drain VIN: 1GERRH4567
I took the ignition switch out and replaced it, the drain was down to 300 ma from 500, car sat for 3 days and fired up without problem. Customer took vehicle and has called into say things are going great. Thankyou all so much on this one, it was drfinatley a ...
2002 Chevrolet Impala 3.4L No Start, cranks,no start VIN: 2G1WF55E12
Thanks for all the help.after replacing ignition switch again ,with no help, I ordered new BCM, Modis could not program,sent vehicle to Dealer.After one weak, owner says it has started every time so far. IATN is one great tool
2004 Chevrolet Tahoe LT 5.3L tracshon control VIN: 1GNEK1Z64J
Hi I am going to call this one fix all though I have not done the work yet one of those vary had to schedule in trucks that is why I have been waiting to close this but they said it may be another week or 2 till they can spar it so as many of you did suggest...
2004 Chevrolet Trailblazer EXT LT 5.3L MIL Lamp on VIN: 1GNET16P74
Hi, sorry to take so long to close this but I was waiting to hear from the customer who is not too worried as long as the MIL is off. I suggested to him to take the truck to the Dealer for the TSB Update to decrease the chance of this code setting (provided it... Trouble codes: P0483.
2005 Chevrolet SSR 6.0L Cooling Systems VIN: 1FDWE35L54
Seems as though the owner wants to wait on this one (not an everyday driver.) Got great feedback most was related to cooing fan operation, thanks for all the help.
1996 GMC C2500 Sierra SLE 6.5L Poor Idle Quality, Misfire VIN: 2GTFC29S8T
We found #1 exhaust valve broken. removed head, sent to machine shop and all 4 was replaced.
2007 GMC Sierra 2500 HD Classic SLE 6.0L abs VIN: 1GTHK29K17
i would like to thank everyone that replide.the problem,was that the wrong hubs were installed.it seems that the 07 uses a diferent hub it has way more resistance.i installed gm hubs peoblem solved.
2001 Oldsmobile Alero GL 2.4L windows, a/c control panei VIN: 1G3N152T61
thanks to everybody who responded. replaced the ignition switch and that took care of it.
2000 Pontiac Grand Prix GTP 3.8L Excessive Emissions, No Start, Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1G2WR5216Y
First off, a big thank you to all that replied to this post. The problem seems to have been a faulty MAF sensor. We replaced the MAF sensor and the problem seems to have been resolved. I will post again if the vehicle devolops any thing new in the future. Than...
1999 Saturn SC1 1.9L MIL Lamp on VIN: 1G8Z5277XZ
Everytime I check this thing ITS WORKING.When I start it up cold its in open loop I can hear the pump run and my o2 drops Im just not sure how low it should drop.It always passes last test failed and ran and pass.The owner says that the light will come back ... Trouble codes: P0410.
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