GM started building 2015 HDs on January 5, 2014. The following are the changes that applied to those built after August.
Deletions
(KH5) dual 150 amp alternators
(G56) Blue Granite Metallic exterior color
(GTS) Blue Topaz Metallic exterior color
New Features
(UE1) Next Gen OnStar, including (VV4) WiFi communications equipment and Mobile Internet Connectivity
USB jack added in glovebox of models with (AZ3) bench seat
Off-Road graphic in Driver Info Center for all Z71 models
Slightly larger exterior antenna with Next Gen OnStar: Body-color on High Country; Black on all other models.
(DQS) Mirrors, outside heated power-adjustable vertical camper, memory equipped, upper glass, power-folding and manual extending, chrome. Includes integrated turn signal indicators consisting of 51 square inch flat mirror surface positioned over a 24.5 square inch convex mirror surface with a common head and lower convex spotter glass (convex glass is not heated and not power adjustable) and addition of Auxiliary cargo lamp for backing up (helps to see trailer when backing up with a trailer) and amber auxiliary clearance lamp
(DPN) Camper mirrors on WT and LT models - include same content and functionality as (DQS) Premium camper mirrors, with the exception of chrome caps (DPN are Black), and no power fold.
(CGN) Spray-on bed liner is now standard on High Country and available on all other trim levels. Includes Chevrolet Bowtie logo on front bed wall.
(GAJ) Silverado High Country available on Crew Cab only (3LZ).
New (PYV) 18" and (PYS) 20" chromed aluminum wheels on LT and LTZ models
DURALIFE brake rotors
Expanded Bi-Fuel compressed natural gas (CNG) offerings available
(KHB) dual 150 amp and 220 amp alternators available with diesel engine
(G1K) Deep Ocean Blue Metallic exterior color
(G7J) Rain Forest Green Metallic exterior color (previously available as promo color)
Changes
(IO5) and (IO6) 8-inch diagonal color touch screen radios now available on LT Regular Cab models (replacing IO3 and IO4)
HD radio feature removed from all radios
Cluster "tick marks" change from White to Blue
Body color door handles, mirror caps, and body side moldings on LT trim. Chrome belt molding on LTZ and High Country trim.
(G80) Heavy-Duty Locking Rear Differential now standard on all models
