The 2002 Chevy Tahoe likely uses a timing chain, not a belt, on its engine. Timing chains are generally more durable and require less frequent replacement than timing belts. However, they can still eventually wear out and require replacement, though this is usually at a much higher mileage than a belt.
You should consult your owner's manual for the specific recommended maintenance schedule for your Tahoe's engine. The manual will provide the correct information regarding timing chain replacement intervals (if any are specified), as well as other important maintenance tasks. Ignoring this schedule could lead to serious engine damage.
