The 2006 GMC Yukon XL is an extended-wheelbase model of the Yukon SUV from the marque's third generation. Available engines include a 5.3L V8 generating 295 hp and a more powerful 6.0L V8 churning out 335 hp, mated to a 4-speed automatic transmission. The Yukon XL is offered in two trims, SLE and SLT, and also a high-end Denali model which incorporated a luxury approach with more standard features. The 2006 model year offered an extension to the wheelbase, providing additional space for passengers and luggage alike. With a four-wheel-drive system, it excelled in challenging terrains and harsh weather conditions. Key safety features include ABS, stability control and multiple airbags. The infotainment system featured a CD Player, with upper trims housing a rear-entertainment system.