So I just picked this up and am doing a major detailing on it...changed all fluids, new batt, rims, tires brakes...you name it! How do I reprogram this> I never got a manual with the truck?

 

What are you trying to reprogram and for what purpose?
Is this an XJ or a truck of some kind?

 

First, open and close the drivers door 3 times. Then cycle the ignition 3 times. After that, turn the wipers on for 5 seconds. Honk the horn for 10 seconds solid. Ignition on for 30 seconds and push and hold the mileage reset button until the screen resets. This is for a Prius right?

 

It's for a 1993 Grand Cherokee Limited....should've mentioned that...

 

Try asking on the Grand Cherokee forum.
https://www.cherokeeforum.com/f5/