Really obscure X-1 question

I'm currently working on a 1/72 Bell X-1, and I'd like to put it in a
vignette showing Yeager standing next to the plane just after landing
on the day of his first supersonic flight.

In one (maybe both) of his biographies, Yeager says he was met by the
Muroc fire chief, just like on every prior flight. My really obscure
question: what was the fire chief driving, and what color was the
vehicle?

I *think* I've seen a film clip of the X-1 being towed across the
lakebed by a vehicle bigger than a jeep but smaller than a typical
Army or Air Force truck. Maybe that's the one?

Mucho thanx for any help!

Les (Friendly Airplane Asylum flack)