If this is an L02 like the model number you listed, you need a lap top or you can use the throttle pedal with the proper procedure (pedal dance). The connection for the lap top on the L02 truck is behind the kick panel in right step well. If you do the pedal dance, the timing is absolutely critical.

-some- have an obd2 connection taped into the wire harness, under the cup holder (pop out the cup holder and reach in to find wire harness).
I hear the pedal dance can work, search these forums for "pedal dance" someone else did a nice write up, but it may have been for an MCFA product.