I just bought a used ecm from an auto wrecker for my '96 Sierra/6.5TD, manual transmission.
I am now getting codes for shift solenoid A and shift solenoid B. I am thinking that this ecm must be from a vehicle with an automatic tranny.
Before I head back to the wrecker, I like to know for sure that I am right.
So... Am I right?

Thanks :)

yes

Thank-you sir!