Mounties in the Fraser Valley community were called to the scene, at McDonald Road and Ballam Road, just before midnight Sunday.
The body of the unidentified victim was pulled from the river after a short search.
Const. Tracy Wolbeck says the truck was recovered early Monday morning.
She says divers are searching the river to ensure no one else was in the truck when it went into the water.
A cause of the crash is under investigation and Wolbeck says the victim's name won't be released until the case concludes.