Subwoofers for a 95 GMC sonoma?

[vlkyrieXmissile]

My friend wants to know if I can help him put subwoofers in his 95 Sonoma... I was just wondering if there were RCA ports on the back of the stock head unit/ stereo. Can I put in everything else? I know how to do everything such as the amp and speakers but I just don't know if he's going to need a new stereo or not.. So the final question haha... Does the factory stereo have subwoofer/rear speaker RCA hook ups?

 

[mike jones]

Theres no rca port, sorry to say but hes gonna have to buy a deck.