2007
Chevrolet Silverado
New Body Style
w/o: RPO codes; GAT, SLT, X31
GAT: GMC "All Terrain" Package
SLT = LT/SLT equipment sales package
X31 = GMC "Off Road" Appearance Package
2008 - 2013
Chevrolet Silverado
w/o: RPO codes; GAT, SLT, X31
GAT: GMC "All Terrain" Package
SLT = LT/SLT equipment sales package
X31 = GMC "Off Road" Appearance Package
2014
Chevrolet Silverado 2500/3500
w/o: RPO codes; GAT, SLT, X31
GAT: GMC "All Terrain" Package
SLT = LT/SLT equipment sales package
X31 = GMC "Off Road" Appearance Package
2007
GMC Sierra
New Body Style
w/o: RPO codes; GAT, SLT, X31
GAT: GMC "All Terrain" Package
SLT = LT/SLT equipment sales package
X31 = GMC "Off Road" Appearance Package
2008 - 2013
GMC Sierra
w/o: RPO codes; GAT, SLT, X31
GAT: GMC "All Terrain" Package
SLT = LT/SLT equipment sales package
X31 = GMC "Off Road" Appearance Package
2014
GMC Sierra 2500/3500
w/o: RPO codes; GAT, SLT, X31
GAT: GMC "All Terrain" Package
SLT = LT/SLT equipment sales package
X31 = GMC "Off Road" Appearance Package