Can someone tell me if these will fit a 90's Tahoe??

[brewcitymike]

I found these headrests from Pyle with built in monitors and it seems like a good deal if they will fit a '97 tahoe. I'm new to the car video set ups and I was wondering if headrests were universal? I don't really know squat so any help is greatly appreciated. Thanks
http://www.amazon.com/Pyle-PL71PHB-Headrest-TFT-LCD-Monitors/dp/B0015H7924/ref=pd_sim_e_5