Selling my cap, in great condition, asking $950.
Fits any 04-12 colorado/canyon that is single/extended cab.
Front and rear glass, metal side doors.
Both sides and rear lock individually.
Has heavy duty rack on top of cap, I've had over 200 lbs on it once and it held solid.
So, I never really saw a lot of shell/canopy pics on extended cabs (or too many ext cabs for that matter), so here is my 05 with its brand spanking new shell:
(this one has the interior light + optional 3 12v power outlets. also has bedrug inside)
and dog approved: