Look at the tach, as the range is completely different. Also, the gas cap says diesel on it.
2016 Chevy 2500 HD Duramax, Crew cab 4x4 Z71
2004 Chevy Suburban
1954 Chevy 6100, 327, dump bed, 2-speed axle
1972 Ford F600 dump truck, 330cid V8, 5-speed tranny and 2-speed rear axle