The 10th generation, GMT800-based Suburbans were introduced in late 1999 for the 2000 model year. They were sold in two series: 1/2-ton 1500 and 3/4-ton 2500. Suburbans came in Base, LS and LT trims. A tow hitch with trailer wiring plug was optional.
For 2000, Chevrolet's long-serving 5.7 L and 7.4 L V8 engines were retired along with the 6.5 L diesel. New were engines were 5.3L the 1500 series and 6.0L for the 2500 series.
New features included:
-A spare tire relocated beneath the vehicle (instead of in the cargo area as on previous models)
-"Puddle lamps" in the exterior mirrors on LS and LT models
-New instrument panel including a driver message center and engine hour meter
-Electronic climate control available on LT models
-Four-wheel disc brakes
-Load-leveling Autoride suspension available on LT models
-Premium Ride rear self-leveling suspension available on LS models
Source: Wikipedia, 2013