Abstract: A grille system for a tilt cab-over-engine truck includes a one-piece, rigid frame grille which extends above and below the cab pivot axis and has a width greater than the radiator tunnel opening. The grille is mounted for automatic swinging movement away from the radiator and front of the cab in a controlled path as the cab is tilted forward so that the grille does not obstruct the tilt path of the cab. The system should be automatic in order to maximize operator efficiency. Guide rods connected to the side of the grille control the path of the swinging movement to prevent the grille from swinging out in a random pattern as the cab is tilted forward, and these guide rods also guide the grille back into position and hold the grille against rubber stops to prevent vibration and bouncing of the grille when the truck is being driven.