Drivers side battery tray - does your fender have a nut built in

[pro17]

Interesting. GM likes to mix and match. The dents on the wheel well for the battery tray, yet that one spot for the side nut is actually for the storage box.

 

[Boyd McDuffy]

If you don't want to mess with all that, just tack the tray in that spot.

 

[BIG_KID]

Self tapping screw