The 2007 Avalanche has been completely redesigned with sharper lines and a stronger chassis. Available in both two and four-wheel-drive in LS, LT or LTZ trim, with the LTZ offering the 310HP - 5.3Liter Flex-Fuel E85 V8 engine as standard equipment. The base engine is the 5.3Liter GenIV small block V8 that produces 320HP. The mid-gate design offers flexibility from 5'3" to 8"2" of cargo bed space. Options include a 366HP - 6.0Liter V8 and the Z71 off-Road suspension.