WARNING: This page is about a different car, the 2018 Nissan NV3500 HD, 2018 Nissan NV2500 HD, and 2018 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
Remove the shock absorber upper nut (A) and washer (B) using power tool.
Courtesy of NISSAN NORTH AMERICA, INC.
: Front
Remove the shock absorber lower nut (A), and bolt (B) using power tool.