TheCarConnection.com notes that the 2008 GMC Sierra 1500 comes in many different trim levels, each with their own features available.
Cars.com notes there are "many choices" when it comes to the 2008 GMC Sierra 1500; available trims are Work, SL, SLE1, SLE2, SLT, and Denali. According to Kelley Blue Book, the "multiplicity of trim levels...allow you to fine-tune your Sierra."
According to ConsumerGuide, standard equipment offered for this GMC 2008 model's base trim include "Air conditioning, OnStar system w/one year service, tilt steering wheel, vinyl upholstery, front split bench seat, folding rear seat, split folding rear seat, rear-hinged rear doors, front-hinged rear doors, power door locks, remote keyless entry, AM/FM/CD/MP3 player, satellite radio, tachometer, intermittent wipers, cargo-box light, automatic headlights, [and] vinyl floor covering," with most of these offered with either the Extended Cab or the Club Cab.
Optional features, according to ConsumerGuide, include "Rear-obstacle-detection system, power-adjustable pedals [and] remote engine start." Kelley Blue Book reports that GMC 2008 Sierra 1500 "SLT models include standard leather seats, the 'luxury' instrument panel, 12-way power-adjustable driver's seat, six-disc audio system with Bose speakers and heated windshield washer system" as well as five different suspension options, "each tailored to suit specific driving requirements."
ConsumerGuide says that the GMC 2008 Sierra 1500 is "among the best large pickup trucks for refinement and available features," advising that "any truck buyer would be well-advised to give these recommended picks a long, hard look."