Built on a new frame featuring hydroformed construction, high-strength steel and magnesium crossbeam the 1999 GMC New Sierra 2500 is introduced in Regular and Extended Cab body styles SL or SLE models. Dual airbags, tilt steering wheel and tie-down loops are included on all 1999 New Sierra 2500 pickups. The 1999 GMC New Sierra 2500 SLE models add air conditioning and CD Player as added standard features. The Extended Cab versions of the 1999 GMC New Sierra 2500 are fitted with a third-door on the passenger side offering ideal for rear-seat access. Standard on 1999 GMC New Sierra 2500 pickups in the short box with rear-wheel drive is a Vortec-branded 5.3 liter V-8 engine delivering 265 horsepower and 320 pounds-feet of torque. On four-wheel drive, long box and HD equipped models, a 300-horsepower 6-liter V-8 engine is offered as standard propulsion. No diesel models of the 1999 GMC New Sierra 2500 are available. A five-speed manual transmission is standard with an optional four-speed automatic gearbox also available. Conventional towing up to 10,000 pounds is possible on the 1999 New Sierra 2500.