The OPP has released the photo of a suspect in hopes that tips from the public can lead to his capture.
He's wanted in connection with a wild case of what police describe as 'road rage.'
It happened last Thursday afternoon in north Etobicoke.
Investigtaors believe the confrontation started with the driver of a black Audi sedan taking exception to the actions of the driver of a transport truck.
Sgt. Kerry Schmidt says the drivers engaged in a back-and-forth shouting match while behind the wheel.
The allegation is that things escalated when the driver of the Audi followed the truck onto the Martin Grove ramp to Highway 401.
Schmidt says the suspect cut the truck off, forcing the driver to come to a stop.
The suspect is believed to have exited his vehicle to climb up the cab of the truck, where he struck and stabbed the trucker through the window, before taking off in his vehicle.
Schmidt says the truck driver's injuries weren't serious.
Anyone with information is asked to contact OPP or Crime Stoppers.