how to identify a 6 speed transmission

[sqrlnts]

Originally Posted by AMERICAN PICK-UP

option code in the glove box. the 4 speed auto truck the option code is M30 the 6 speed auto the code is MYC. all of the info in on the spid code in the glove box.

Thank you for the info. I also found this info which I believe to be true.

The 4 has the standard PRNDL and 6 speed has a manumatic with push button + and - on the column. It will come up PRNDM on the dash.