What you get with your 2008 Chevrolet Avalanche depends on how much extra you're willing to spend.
Cars.com reports that "three trim levels are available: base LS, LT and top-of-the-line LTZ," and notes “all Avalanches come well-equipped with power windows, power door locks and keyless entry, as well as a power driver's seat and steering-wheel audio controls.” According to Edmunds, "there are two main trim levels; LS and LT, plus a premium line-topping LTZ package." ForbesAutos details the following standard 2008 Chevy Avalanche base-model standard equipment: "Power driver seat, Split folding rear seat, Radio data system, Driver front impact airbag, Passenger front impact airbag, Overhead airbag [and] Electronic stability."
As the buyer opts for higher-level trim packages, Cars.com reports they'll encounter "two new colors...available for [the 2008 Chevy] Avalanche: Blue Granite Metallic and Deep Ruby Metallic." This source adds "the Avalanche LS gets standard 17-inch alloy wheels. The LTZ upgrades to 20-inch wheels and an electronic continuously damping suspension, both of which are available on the LT [as options]."
The bed has built-in features designed to make carrying cargo a snap. “The bed offers a non-slip mat that even held bags of ice in place. Each rear fender incorporates a lockable compartment, accessible from the top,” Cars.com reports. “A three-piece cargo cover is standard, though it's difficult to remove and even harder to stow.”
Edmunds suggests that the Chevrolet Avalanche 2008 "LT is generally more desirable because it's upgradeable with additional extras for those who want more than an entry-level vehicle" than a base 2008 Chevrolet Avalanche.
Options include a navigation system and a rear-seat DVD entertainment system, Cars.com says, as well as "heated front seats” and “DVD-Audio," according to ForbesAutos.