The 2005 Chevrolet Express van came with either a Vortec 4800 (4.8L) or Vortec 6000 (6.0L) V8 engine. Both of these engines are pushrod V8s, meaning they have
two valves per cylinder.
Since they are V8s (8 cylinders), they therefore have 2 valves/cylinder * 8 cylinders = 16 valves total.
