Does the 2000 Chevy Silverado 1500 hd stock stereo fits on 2001 hd?

While it's *highly likely* the stock stereo from a 2000 Chevy Silverado 1500 HD will fit a 2001 Chevy Silverado 1500 HD, it's not guaranteed. There's a small chance of minor differences in the mounting brackets or wiring harness connectors between the model years.

To be sure: It's best to physically compare the radios or check the part numbers. If you can find the part number on both radios, a quick online search or check with a parts dealer will confirm compatibility. Otherwise, visually inspecting the mounting points and harness connectors before attempting installation will prevent any potential problems.