When Ponch is in the helicopter describing the GTA vehicles, he tells Jon "...A brown Chevy van, the same van, Jon..." However, the van used, and the one they had pursued before was a clearly Ford Econoline van.
Ponch has an obvious fear of going up in a helicopter and is trying to avoid his turn doing so. When he's finally going up, he's asked if it's his first time being in a helicopter and Ponch responds no, only that type of helicopter. In CHiPs: Career Day Ponch was up in a helicopter flown by and for the CHP. Not only was he eager to go up in the helicopter but didn't express any fears of it afterward.