Yes, a 2000 Silverado has several AC fuses, not just one. They won't all be labeled "AC Fuse" though. They'll be related to the A/C compressor, blower motor, and other components of the system. You'll find them in both the underhood fuse box and potentially the interior fuse panel (depending on the specific options of your truck).
To find the correct fuses, you'll need to consult your owner's manual. The manual will have a diagram showing the fuse box layouts and what each fuse protects. Look for fuses related to the A/C compressor (often a high-amperage fuse), the blower motor, and any related circuits.
