If it's at high speed it could be alignment, loose steering components, bad tires, bad rear sway bar or overloaded in the rear of the truck bed. If it's at low speed it could be a bent wheel or slipped belt on one of the tires.
Broken sway bar or sway bar links.
Ensure all sway bar links are good (front & rear). Make sure front end is tight and struts are not worn.
Most often that would be caused by a tire that has separated inside. That in turn is often caused by making tires roll the opposite way than they have been used to
Rear upper & lower control arm bushings need to be replaced.
shocks will not cause car to sway side to side...need to check sway bar...soonnn
This is a well-known problem with this generation Pathfinders... the rear upper and lower control arm bushings are worn. Have them replaced and the sway should disappear.
check the sway bar on the right side.
A bad sway bar will cause vehicles to shift from side to side more easily when turning. The sway bar provides stability and limits motion.
sway
sway
A sway bar is a torsion bar mounted laterally on a suspension and is designed to reduce side sway. The sway bar attempts to accomplish this by transferring movement from one side of the suspension to the other. This is done through the connection of a torsion bar to each side of an axle by flexible links. (Sway bar links)
I had a 1990 nissan maxima that use to do that and the problem was my rack and pinion bushings were bad