What fuse controls the heater in a 94 Chevy Cheyenne?

In a 1994 Chevy Cheyenne, the fuse that typically controls the heater is the "HVAC" or "Heater" fuse located in the fuse box under the dashboard. It's essential to check the owner's manual for the exact fuse designation and amperage, as configurations may vary slightly. If the heater is not functioning, inspecting this fuse for continuity is a good first step.