× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 6, 2010
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for GM
Help Request Answers
2001 Chevrolet Silverado 2500 HD 6.0L 1-2 shift VIN: 1GCHK29U61
Hello. This transmission has delayed 1st gear engagement, but reverse engagement is fine. At times the idle must be increased for engagement, but once engaged in gear, no slip is evident. When shifting to 2nd gear at times it flares before a delayed 2nd engage...
2002 Chevrolet Suburban 1500 LT 5.3L odor VIN: 3GNFK16Z92
this flex fuel vehicle has no running problems or starting problems. after the vehicle sits for awhile(not running) it has a bad gas smell inside vehicle that can be very strong. no codes are present. performed the 20 minute evaporative emessions tests with sc...
2002 Chevrolet Express 2500 5.0L No Start, Cuts out, MIL Lamp on VIN: 1GCFG25M52
hello fellows happy new year to you all.this truck came in the hook crank no start condition costumer claims that the truck was running then stumbles and died and never re star we check all the basic stuff has spark,fuel pressure and injector signal the compre... Trouble codes: 101 (maf), 335 (ckp), 1341 (cam)
2002 Chevrolet Impala 3.8L Misfire VIN: 2G1WF55KX2
This vehicle has a misfire at IDLE ONLY on #1 cylinder only after it is hot. Cold start is ok. As soon as the throttle is opened when it is misfiring, it goes away. Long term fuel trim was at 10% and short term was 0. We have performed a motorvac fuel service ... Trouble codes: P0300
2002 Chevrolet Cavalier 2.2L drivers power lock VIN: 3G1JC52412
This cavalier will not unlock the drivers door with the remote or the power lock switch.Second push of button on remote unlocks other 3 doors.also trunk release will not work from remote or under dash button [ the under dash button just sends a ground signal t...
2003 Chevrolet Trailblazer EXT LT 4.2L fuel pump VIN: 1GNET16S63
when vehicle came in with a no start and/or a start and no run condition. initial inspection showed the battery to be bad, failing the load test. it had no cold cranking amps. battery was replaced. vehicle still had a problem. further tests showed the fuel pum...
2004 Chevrolet Impala 3.4L Poor Idle Quality VIN: 2G1WF52E04
Cooling fans normal(seen identix problem for BCM effecting Cooling fans and/or driving IAC to 255 counts), communication with PCM and BCM. Car had been sitting for about a year. after staring had very high idle. found IAC stuck, replaced and seemed ok(found ou... Trouble codes: P0507 (High Idle speed)
2005 Chevrolet Trailblazer LT 4.2L Drive-axles VIN: 1GNET16M55
code c0327 encoder motor malfunction. service light on. go through mitchell flow chart comes up replace encoder sensor motor. replaced. Code automatically cleared out. turn key on lights on 4wd switch light up and go out. try to change positions no change. on ...
2006 Chevrolet Trailblazer LS 4.2L MIL Lamp on, P0171 VIN: 1GNDT13S86
Need some real help here. i have one know one can figure out. It is a 06 Trailblazer that keeps throwing a P0171 code. Whenever it feels like it. sometimes you can drive 20 miles and it sets and other times you can drive 400 miles before it sets. pulled it int... Trouble codes: P0171 (Fuel trim system lean)
2003 GMC Sierra 2500 HD 6.6L No Start VIN: 1GTHK23163
This vehicle was towed in, customer said it had been smoking and they had meant to get it in, it then died on them while going down the road and would not restart. We do not see a lot of diesel vehicles in here, so I am semi familiar with the Duramax, but not ... Trouble codes: P0341 (CMP sensor circuit out of range), P0380 (Glow Plug heater circuit problem), P0374 (Timing reference signal A no pulses), P0530 (Refrigerant pressure sensor circuit), P0622 (Generator field F control circuit problem), P0700 (Transmission control system fault)
2004 GMC Sierra 2500 HD 6.6L Excessive Emissions, No Start VIN: 1GTHK24204
i have this 2004 gmc 2500 4x4 and it wasd towed in as a no start ? customer has changed fuel filter at some point recently and all the codes listed have been cleared and have not come back , so i assume they are rogue and not of concern yet.. the problem i am ... Trouble codes: P0046 (turbo boost control position perf.), P0087 (fuel rail pressure too low frp), P1093 (fuel pressure low while power enrich), P1094 (fuel rail low wheel idle or fuel cut), P2229 (baro sensor circuit high)
2006 GMC Yukon Denali 6.0L Excessive Emissions, Poor Idle Quality, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on, running extrem rich VIN: IGKFK66U16
hello and thanks in advanced the customer broke down drove this truck in it wont idle on its own you have to hold your foot on the gas pedal , i check code listed above the customer stated this happen all of a sudden the fuel trim has a neg reading -19 and the... Trouble codes: P0101, P0300
2002 Saturn Vue 3.0L cyl. head VIN: 5GZCZ63B02
have oil leak in cyl head 1 inch below valve cover gasket.called my machine shop and they said can't pressure test for oil leaks. applied air to area but can't see any leaks. has anyone seen this before??? help, thanks in advance!!!
2004 Saturn Ion-1 2.2L No Start
intermitantly this car will not crank, only cold with security light flashing, its the typical lock cyl issue with other GM cars. my PC is down at the shop so im on my personal pc with no imformation sys so if any one knows of any TSBs on this car for b2960 an... Trouble codes: B2960, B3033

Fixes & Summaries for GM
Fix/Summary Answers
1990 Buick Skylark Custom 2.5L Battery voltage VIN: 1G4NV54U7L
First off thanks to all of your responces. Here is what I found, 1-Never let yourself brain fry over an issue like this. 2-The battery had gone down several times and quick charging will pass short test but fail longivity test. So trickle charge a weak battery...
2002 Buick Century Limited 3.1L Hesitation, Surge, Stall, Misfire, MIL Lamp on VIN: 2G4WS52J12
hello everyone: I begin by apologizing to some members who were not happy about me not having more info and test results from the basics. Well I forgot some details, and here they are. I performed a compression test for all cylinders, checked the crank sensor... Trouble codes: P0300 (Random missfire).
2003 Cadillac CTS 3.2L lubrication VIN: 1G6DM57N03
Well as many of you said to check the oil cooler lines under the intake that is were my leak was. I had to order the parts but I am sure this is the leak. Thanks again for the quick responses.
2002 Chevrolet S10 4.3L No Start, MIL Lamp on VIN: 1GCDT19W62
Thanks for the help. Called a friend at a machine shop to see if the reluctor wheel is part of the crank. It is not it is a press fit. Well it turns out the customer ran it low on oil and the front bearing spun. With that and the crank sensor rubbing on the re... Trouble codes: P0355.
2003 Chevrolet Trailblazer LT 4.2L MIL Lamp on VIN: 1GNDT13573
Thank you for all the information. Some replies talked about a tsb from GM. We contacted GM to ask for tsb, but they were not able to find it. Numerous hits talked about using an updated thermostat. The thermostat we used the last time was GM. Other hits ... Trouble codes: P0128.
2003 Chevrolet Malibu 3.1L wipers VIN: 1G1ND52J43
Thanks to all who replied. Dennis from Wisconsin hit the nail on the head. Installed a new wiper module and all is well. Wiper motor behaves like it should. Thank you to all again.
1999 GMC Sonoma SLE 4.3L Transfer Case VIN: 1GTDT14X8X
Thanks to everyone that submitted help. Heres the news. The tires were all the correct size. Measured them and everything. Got the truck to make the sound on the lift finally by power breaking it in 4x4 and BANG. Its a sound that I never want to hear again it ...
2001 GMC Sierra 2500 HD SLE 6.6L Poor Idle Quality, Hesitation, Surge, Misfire VIN: 1GTHK23311
2002 Oldsmobile Alero GL 2.2L No Start VIN: 1G3NL12FX2
Well, this turned out to be an easy fix. I decided to check a few fuses on each output wire from the ignition switch and make sure that they had 12 volts in the appropriate switch positions. I found one supply circuit that should have been providing voltage in... Trouble codes: B1379 (b2960-), B2960 (b3128-), B3128.
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next