[Dakota00]

p-0442 (most of the times it's a loose gas cap, if not it needs replacing.)
p-0734 (Gear 4 Incorrect ratio) How's the tranny shifting??
p-1790 (TP (Electric) Circuit Malfunction)

Most likely it's a couple of shot sensors on the tranny, (my guess)

Disconnect the battery "-" cable, then turn the key in the ignition like your starting the truck hold 15-25sec.
Then turn key back off. Hook up the battery go for a drive and see if the codes return. This is the way of resetting the computer and codes.