Owner's Manual
Page 300
... Light Green: Back-up Lamps Light Blue: Center High-Mounted Stoplamp (CHMSL) If you need to upgrade your vehicle to the trailer wiring harness for use with a trailer, slide-in camper or cap. 4-78 Your pickup may be equipped with a seven-pin universal heavy-duty trailer connector are available from your dealer...
... Light Green: Back-up Lamps Light Blue: Center High-Mounted Stoplamp (CHMSL) If you need to upgrade your vehicle to the trailer wiring harness for use with a trailer, slide-in camper or cap. 4-78 Your pickup may be equipped with a seven-pin universal heavy-duty trailer connector are available from your dealer...