StabiliTrak electronic stability control ($750) is available on premium package 2WD models. Avalanche 1500 4WD can be ordered with Chevrolet's Z71 off-road package ($1955), which combines 265/70R17 on/off-road tires, a high-capacity air cleaner, skid plates, and off-road suspension with a long list of luxury extras.
Avalanche 2500 4WD is powered by the Vortec 8100, an 8.1-liter V8 rated 320 horsepower and 445 pounds-feet of torque. It comes mated to a 4L85-E heavy-duty automatic transmission, also with overdrive and Tow/Haul mode. In place of the 1500 model's five-link rear suspension with coil springs and automatic load leveling, the 2500 rides on two-stage, heavy-duty leaf springs. Towing capacity is boosted to 11,900 pounds, with a payload rating of 1807 pounds.
Relative to the 1500, the 2500 does not add any luxury equipment or interior appointments, but it does come with its own heavy-duty carpeting and rubberized floor mats, a larger (37.5-gallon) fuel tank, a transmission temperature gauge, transmission oil cooler, and skid shields. Wheels are forged rather than cast, and tires are higher-profile 245/75R16s, rather than the 1500's 265/70R16s. Next Page