I have a 2008 Sierra 1500 (5.5 ft bed) and trying to decide between the sleek frameless windows that tip out, or framed sliding windows? I have read elsewhere: Framed windows make a stronger shell and can hold more. True? Frameless windows are harder to break into for theft. True? For those that bought sliding windows, were you happy you did it? I don't have dogs so ventilation in the back is not too much of an issue, but I liked the idea of being able to reach in from the sides to get stuff from the cab. Plus not sure how I might use the p/u bed going forward. Advice? I'd go with Snugtop or Leer.

 

less seals=less opportunities for them to go bad and water to go in
there is no such thing as harder to break glass. they have spring loaded tool that breaks anything. short of welding bars on the canopy, there's no window that they won't break if they want to.