Bed dimensions

[Hawg211]

Can anyone tell me or direct me to where I can find the inside dimensions of the M1009 bed? What I am particularly interested in is the distance from the back of the front seats to the end of the bed, and the height of the opening with the tailgate open.

 

[chevy79k5]

gate open aprx 37.5in frome back of front seat to end of tail pan aprx 80in and to end of gate aprx 105in