I found this pair of old trucks lurking in the undergrowth in an old salvage yard, somewhere in East Montana.
While I'm normally pretty good at identifying American machinery from the 40s, 50s and 60s, I have to confess that the 20s and 30s stuff all look rather alike to me. But I'm sure someone out there knows exactly what they are. I look forward to hearing your comments.
Click below for a closer look

They appear to be Chevrolets, judging from the stain left behind on the radiator shell in the second pic.
Brian,
I'd go with Chevrolet as well as they look very similar to the Bedford W series from the early thirties. Vauxhall had been owned by General Motors since 1925 and although the earlier, lighter Bedfords were based on Buicks, the heavier W series was based on the Chevrolet 30cwt with British designed axles and wheels.