LED Tail Lights Compatible with 2017 2018 2019 GMC Acadia SLE/SLT Taillights Black Housing Rear Outer Tail light Assembly GM2805127 84709438 (Right Passenger Side & W/All Terrain Pkg). Smart Plug-and-Play Install : tail light assembly no modification required, 10 minutes for an easy bolt-on install Step 1: Remove 2 T15 screws Step 2: Disconnect old harness Step 3: Snap in new tail light assembly.