Slayer

I'm pretty sure Slayer was a SyFy original.

There's a seriously crazy cast- Casper Van Dien, Lynda Carter, Danny Trejo, and Ray Park.

It's like... Predator, with Vampires.

Casper Van Dien playes a soldier in Central America. On patrol, he and his platoon encounter a group of vampires; killing them, they return to the States.

Upon returning his boss, Colonel Weaver (played by Lynda Carter), tells him that there have been other incidents and that her God-daughter- and his ex-wife- is out there in the jungle.

He's got to rescue her, and they've got to stop the vampires- one of which's played by Ray (Darth Maul) Park (two, actually- he's playing Acrobatic Twins, that's like their official credits title).

It's a standard SyFy timekiller, but there's a clever subtext about human encroachment in the Central and South American Jungles.

Of course, that's sort of negated by the fact that the town the vampires are operating out of is called Agua Caliente.