I'm trying to find the name of a movie. I know it was done back in the 90's, it dealt with a biological weapon having to be kept at a certain temperature,it starts in a convenience type store and then these 2 guys travel in a refrigerator truck, but the bad guys chase them down the winding moutain road and there is an awesome gun fight. I believe the ending is where they put the biological weapon inside the truck into an air tight, blocked off tunnel, right before it goes off.

Chill Factor (http://www.imdb.com/title/tt0163579/)