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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 19, 2011
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Open Help Requests for GM
Help Request Answers
2003 Cadillac CTS 3.2L Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G6DM57N23
Vehicle came in with codes clear and pending codes p0154 insufficient activity bank 2 sensor 1. Did standard test for oxygen sensors using fuel enrichment and scope. Found oxygen sensor bad, recommended replacement of both front o2's. Vehicle left and came bac...
2003 Cadillac Escalade ESV 6.0L Front Differential
Front differential has worsening whining noise which changes with speed. Noise is loudest while decelerating (in gear). No sign of leakage, fluid is clean. No PCM codes. I would like to know how many techs have seen these front differentials wear out around th...
1993 Chevrolet C1500 Cheyenne 5.7L Cuts out, Misfire VIN: 1GCEC19KXP
truck came in no power on hard accell.truck feels like lack of fuel or plugged exhaust. new parts installed.fuel pump,injectors,new distributor(not reman) ,coil,plug wires,map sensor, knock sensor,new fuel,spark plugs,adjusted ign timing both ways, checked ex...
2005 Chevrolet Silverado 3500 6.6L #7 cylinder
Hi All- I have a 05 duramax LLY. Has bad midrange fuel knock on cyl #7 dosen't matter hot or cold. will fog out the shop and following cars in seconds. Have a Solus Scanner 11.2 update. Shut down #7 knock and smoke gone- so I replaced injector #7. Not much bet...
2007 Chevrolet Silverado 3500 HD WT 6.6L Shift fork VIN: 1GBJK34637
Wondering if anyone has dealt with fork issues on these trucks. We were positive the first time the issue was related to no fluid causing the fork to burn up. Maybe we should have replaced the slider that the fork grabs. Also this is the range fork. Any help w...
2009 GMC Sierra 1500 SLE 5.3L ipc , and no start VIN: 2GTEK19J29
truck was towed in for no start ipc takes for ever to wake up no codes in truck prndl has no lines under it truck will not crank can not communicate with the following ipc , abs , ebcm , ddm , have checked all fuses all ok , removed fuse box and no corrosion h...
2004 Pontiac Sunfire SE 2.2L Misfire, MIL Lamp on VIN: 1G2JB12F44
Has new plugs coil pack and scoped injectors swapped injectors from one cyl to another and no change.Compression test 150 psi all 4 cylinders.Help this thing is driving me nuts,also pulled cam covr and checked t chain seems to line up properly with intake gear... Trouble codes: 301 (misfire 1)
2000 Saturn SC2 1.9L No reverse VIN: 1G8ZY1277Y
Hi Guys, The original complaint was no reverse when hot. It would move when cold but not until 3000 rpm's. I also noticed that when changing directions from reverse to forward or forward to reverse that it would go into gear very hard. Infact, at the instant ...
2005 Saturn Relay-2 3.5L Abs VIN: 5GDZV03L95
Vehicle came in having been diagnosed with a bad rf wheel speed sensor at another shop. The owner replaced the bearing and did not get it tight enough. We replaced the bearing again and it was fine for a bit but now is back with the false engagement problem at...

Fixes & Summaries for GM
Fix/Summary Answers
2001 Chevrolet Suburban 1500 5.3L Transfercase VIN: 1GNFK16T51
we pulled out the t-case and the rebuilder went thru it again looking for problems, bearings etc he said all looked good. we did replace the rear yoke and a couple of very slightly bad u-joints for the rear shaft and that took care of the rear seal but the fr...
2007 Chevrolet Silverado 3500 Classic WT 6.6L No Start VIN: 1GCHK33D97
thanks for all the input guys!i checked for mechanical issues,loose crank pulley and the such and found none.so i lab scoped the cam sensor signal and it looked a little a goofy,not good and square at the top of the wave.put a new cam sensor on it and it fired... Trouble codes: P0341.
2003 GMC Yukon Denali 6.0L MIL Lamp on VIN: 1GKFK66U73
Thanks to all who offered help, william hit the nail on the head it was the brake booster, thanks agin Trouble codes: P0171, P0174.
2007 GMC W3500 Forward W3S042 5.2L Hesitation, MIL Lamp on VIN: J8DB4W1687
I would like to thank Rob he was the only reply on this problem,we never had a chance too work on this truck again it went back too Sault ste Marie and nobody else could figure it out either so the truck is going too have the towing deck removed put onto a dur... Trouble codes: P02E7, P02E8, P2463, P244B.
1998 Pontiac Sunfire SE 2.2L Starting VIN: 1G2JB1249W
well thanks to napa i really chased my tail on this one. the original problem was that the ignition lock cylinder would not turn far enough to crank the engine. the keeper that holds the tumblers had come loose on one end and was sticking out causing it to cat...
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