The WeatherTech 3rd Row Rear Floor Liner, # WT450665, is just the floor mat for under the 2nd row bucket seats and the floor area of the 3rd row seats on your 2009 Cadillac Escalade ESV it will not go behind the 3rd row seats.
The WeatherTech Cargo Liner, # WT41311, is for just the cargo area behind the 3rd row seats on the Escalade ESV.
The WeatherTech Cargo Liner, # WT41306, is a cargo liner for the Escalade (except the EXT and ESV) that will cover from the 2nd row back to the tailgate.... view full answer...
Yes, for your Tekonsha Prodigy P3 Brake Controller, # 90195, you can get the brake wiring harness separately.
For the 2017 Cadillac Escalade, the Tekonsha Plug-In Wiring Adapter, # 3016, will be the wiring harness you will need to connect your P3 to your vehicle's harness. view full answer...
For this you will need the Curt Ball Mount # C45070, Curt Anti-Rattle Kit # C69HR and the Curt RockerBall Shock Absorbing 2-5/16" Hitch Ball # C82KR.
The ball mount and anti-rattle kit are the same ones that are included with the Curt RockerBall Anti-Rattle Towing Kit # C43KR. view full answer...