Using the Canyon Build and price on the US website, 4X4 is $4-5K more.
These are just the lowest costs for extended cab, long box (before fees and options) on the builder:
4x2 4x4 4x4 premium
Base 20,995 not avail
WT 22,650 27,760 $5,110
LT 26,045 30,095 $4,050
Z71 28,505 32,430 $3,925
However, these are the US builds, so I wouldn't be surprised if the 4x2 wasn't available on top trims in Canada