Early suburban. A chevy in that era would be similar, 39 to 47 I'd guess by the firewall. Cool thing though!
It's a pre WWII Suburban, but without a front clip can't say if it's Chevy or GMC. If it has a vin tag it should identify it as which one. Far more Chevys were sold. Year could be anything from 1937-1941.
37-42 suburban, the actual year depends on which year truck ch***is and front sheetmetal you use to build it. the only real differences between the years is the dash. maybe the cowl.