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
For 2001, the 6.0L V8 in 2500-series Suburbans gained 20 hp from a number of changes including aluminum cylinder heads. A new 8.1L V8 was added as an option for the 2500 as well. OnStar became standard on LT models and LS models with the new Z71 package.
2002 saw several optional features made standard equipment on the LS model, including front and rear air conditioning, alloy wheels, power windows, power front seats, side steps, fog lamps, and heated outside rear view mirrors. Base models were discontinued, leaving LS and LT. The 5.3 L V8 in the 1500 series added flex-fuel capability. The 6.0 engine was not available in the 1500 series.
For 2003, all GM full-size trucks received an upgraded interior, with a redesign of the center console and other enhancements. New radios offered Radio Data System compatibility, XM satellite radio, Bose sound and improved ergonomics. Adjustable pedals were added as an option, and the instrument cluster-mounted Driver Information Center was improved and monitored up to 34 vehicle functions. A ceiling mounted Panasonic DVD system was added as an option.
Source: Wikipedia, 2013