The G506 used a Chevrolet BV-1001-UP, a 235 cu in (3.9 L)overhead valve inline-six cylinder gasoline engine developing 83 hp (62 kW) at 3,100 rpm and 184 lbf⋅ft (249 N⋅m) of torque at 1,000 rpm.
This is a smaller version of the engine used in the GMC CCKW.

All models had a four-speed manual non-synchronized transmission and a two-speed transfer case.
The G506 used a Chevrolet BV-1001-UP, a 235 cu in (3.9 L)overhead valve inline-six cylinder gasoline engine developing 83 hp (62 kW) at 3,100 rpm and 184 lbf⋅ft (249 N⋅m) of torque at 1,000 rpm. This is a smaller version of the engine used in the GMC CCKW.
All models had a four-speed manual non-synchronized transmission and a two-speed transfer case.
Chevrolet G506