Who makes tonneau covers for GM?

[hapan]

Does anyone know who makes the best tonneau Covers for GM? They kind of look like Advantage in the way they latch. I bought an Extang but so far two of them don't fit right. I'd like to buy the one from GM but they're a little pricey and it says you need to have the bed rail protectors. I put this post on another site also. Somebody out there must know

 

[tacojoel]

Idk who, but my neighbor has a 5 year old chevy Silverado that came with a tonneau cover. It's not very impressive. The tacoma one is much heavier, and so far, mine appears more durable.