Here's what I'm using:
noose, noose, car, NOOSE, NOOSE, VEH@VAN, VEH@VAN_RI2_LE2, 100, 999, 0.3407, 0.3407, 0.3, 2, 1.5 ,1, noboot+avoidturns+ext_requi+truckfirefx+truckenginefx+livery+ext_strong
with Sgt Kanyos handling line of course. The Lenco should sound like a truck regardless of being placed in the noose slot as I added the fire truck sound bit to the end.