The 2006 GMC sierra crew cab bed size 79.2. There are no options to upgrade this, so unfortunately You will be stuck with this size.
Sherrie J
November 17, 2020
The 2006 GMC sierra crew cab has a bed that is 79.2" In length.
Cathy C.
April 13, 2020
The 2006 gmc sierra crew cab bed size is 220.2" L.
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