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Old 02-22-2021, 12:32 PM   #9
1976gmc20
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Join Date: May 2015
Location: Montana
Posts: 3,696
Re: 6l90e no reverse

Quote:
Originally Posted by Bob B. View Post
Transmission control modules on the 6L80 and 6L90 and mounted on the valve body, and have to be programed to the truck. Dealers and some of the better independants shops can do this. I suspect the wild quotes you got are from shops that know they can't handle these transmissions so they sub them out to the nearest dealer and pad the bill. Or they just don't want the job. The fleet I work for has had very good luck with the 6L90.
Well, for better or worse I had the Chevy dealer replace mine
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Current/past Chevy/GMC trucks:
1958 Chevy C-60; 1965 GMC C-50; 1965 Chevy C-10; 1971 Chevy K-10; 1973 Chevy K-20; 1976 GMC C-20; 1977 Chevy C-10 Suburban; 1980 Chevy K-10; 1989 Chevy K1500; 1991 GMC V1500 Suburban; 2016 Chevy K2500 HD

Other vehicles: 1988 Jeep XJ; 2011 Toyota 4Runner
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