2010 GMC Sierra 1500 Denali 4dr Crew Cab AWD 5.8 ft. SB (6.2L 8cyl 6A)
Drove G.M. trucks for 30 years, this is noisy one. No insulation on floor under back seat.G.M. will not fix so look before you sign papers because after you sign you are on your own.Going to buy ear plugs,another bad investment.
Put another piece of insulation at factory, it is not very expensive.