No, a transfer case from a 1991 Chevy will almost certainly
not fit a 2001 Chevy. Even if they're both trucks (or SUVs), the transfer case design changed significantly over that ten-year span. Different drivetrain configurations, output shaft sizes, bolt patterns, and even the overall case dimensions are likely to be incompatible.
You need to find the correct transfer case for your specific 2001 Chevy model (including the engine and drivetrain configuration). Consulting a parts catalog or a mechanic specializing in your vehicle is crucial to ensure proper fitment.
