Autotrader has 290 Used GMC cars for sale near Port St. Lucie, FL, including a 2013 GMC Sierra 1500 4x4 Crew Cab SLT, a 2014 GMC Acadia FWD SLE w/ SLE-1, and a 2014 GMC Sierra 1500 2WD Crew Cab SLE ranging in price from $2,499 to $102,990.