How much oil in 97 Chevy K-1500 Z71?

The oil capacity for a 1997 Chevy K-1500 Z71 depends on the engine it has. You'll need to check your owner's manual or a reliable online resource like a parts website (using the VIN is best) to find the exact capacity for *your* specific truck.

Generally, Chevy K1500s from that year had either a small-block V8 (like a 5.7L) or a larger V8 (like a 7.4L). The oil capacity will differ significantly between these engine sizes. Expect the capacity to be somewhere between 5 and 6 quarts, but don't rely on that. Check your documentation for the precise amount.