Yes you can play TV audio through the A/V system and it should already be wired. That is a cable from audio out on the TV to an aux input port on the rigs A/V mine is a SONY A/V. Then on the A/V system select the correct source input and with the TV audio on, should have audio through your A/V system and the internal/external speakers. Generally on the TV menu there is an option to enable/disable TV speakers.
Enjoy your Raptor 300 MP, Great Rig !!!!
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2013 RAPTOR 300MP w/Rear Patio Deck NO Folding Side Ladder
2013 Silverado 3500HD LTZ CC LB 4X4 DRW
Duramax 6.6L Turbo Diesel; Allison Trans
Reese 20K; Carlisle Radial Trail RH/HD; TPMS (12 Tires)
Veteran
PSU (GO LIONS)