SOURCE: 2001 gmc 2500 6.6 w/ allison transmission,keeps
You may want to inspect the "pass-through" connector for water contamination, and/or related wiring for corrosion.
SOURCE: I NEED A REPAIR MANUAL FOR A 202 GMC SIERRA 2500
Well the tchnical specs are available at
http://www.google.co.in/url?sa=t&source=web&ct=res&cd=9&url=http%3A%2F%2Fmedia.gm.com%2Fdivision%2F2004_prodinfo%2Fgmc%2Fpdf%2F04_GMC_Fleet.pdf&ei=VnjLSuPiNJze6AOg_JH9Ag&usg=AFQjCNFGSInnhC-fLTlqFE7yekGDKtwNCA&sig2=4uWnjikXApamQW-bb26Twg
However 202 I have assumed to be 2002 & if so then download the Users manual and trouble shooting tip from this site:
http://safemanuals.com/user-guide-instructions-owner-manual/GMC/SIERRA%202002. I hope this is what you are looking for...sodeep
SOURCE: 2006 chevy truck 3500 hd duramax diesel with an
658 is a unknown code on the list,is your active or inactive,iif inactive I would not worry about it
SOURCE: I have a 2000 chevy 2500 series 4x4 silverado
if it won't shift into 3rd either automatically or manually, then your 3rd/4th gear clutch is worn out. You're probably looking at a rebuild.
SOURCE: i have a gmc 2500
http://www.makcotransmissionparts.com/Chevrolet-GMC.html
you are stuck with the Allison 1000 tranny.
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