Hiya... here's the details of fender removal/installation:
the left-side (same for right-side) fender has 6 bolts attached to the "sidebody" frame.
The bolt location:
3 are on the top fender-easy to find when hood is open,
1 is hidden at the rear of top inner fender-just open the left-front door wide to find it (early equinoxes had foam-like noise absorber material in it, just remove it from underneath fender after the wheelwell liner is removed),
1 bolt is hidden at bottom of front fender area at headlight/bumper area-you need to remove plastic wheelwell liner to gain access,
1 bolt is hidden at bottom of rear fender area where the black plastic rocker panel meets below the fender...
THIS area is probably the most difficult task to do since it requires you to remove a small bolt found on the front of rocker panel behind the front-left wheel then use a flat screwdriver or clip removal tool to pry open the black plastic **clip's 'dime-sized' head prior to pull out the clip's body (it has 8 clips underneath the chassis) then use your hands to grasp the rocker panel underneath, pull it down-toward you...this should do it....USE CARE during rocker panel and clip removal/installation so you don't break the clips!
It also has yellow plastic clips inside the rocker panel (used as a guide during installation into rocker sill holes-use caution not to break it)
**note: early equinoxes had rocker panel clips that you can actually pull it out from the hole, while later equinoxes has 'built-in' clips inside rocker panels that you don't see the clip heads below it due to engineering part design change**
Be sure to exercise care when handing this task!