Ironhide transforms into a Black GMC topkick truck, the "Ultimate Class IV Topkick Pickup".  In the movie, the truck seen to be used as a transport unit for the military agent (NEST).  In the toy (I had one), I dont really like the weapon being plucked every where in the car body.. it looks too crowded.  Hence I like the ol plain vanilla, civilian version of the SUV truck.

General guidance: The truck parts are almost all used to construct the Robot mode.

MECHA - Instruction