The Avalanche comes in two weight ranges, called 1500 and 2500. The 1500 series is offered in rear-wheel drive and four-wheel drive. It is offered in standard LS and more upmarket LT trim. It is powered by a 5.3-liter Vortec V8 producing 295 horsepower and 330 pound-feet of torque. It is controlled with a 4L60-E four-speed automatic transmission and is rated to tow 8200 pounds with 2WD, 7900 pounds with 4WD. Published payload capacities are 1363 pounds with 2WD, 1349 pounds with 4WD. The unique feature of the Avalanche is the clever Midgate that allows the rear passenger seats to be converted into additional flatbed space.For 2006, the Chevrolet Avalanche sees minimal changes. A tire pressure monitor now comes standard.