Truck cabin tilt hinge assembly in a commercial motor vehicle (1) comprising a chassis (3) having a pair of parallel elongate chassis beams (9), an engine (11) mounted between the elongate beams (9) of the chassis (3), and a driver cab (7) positioned over the engine (11). The driver cab (7) is forwardly tiltable with respect to the chassis beams (9) to give access to the engine (11). The vehicle (1) further comprises a pair of opposite swivel arms (25), each of which swivel arms (25) is pivotally mounted with a lower end (37) to an associated one of the pair of chassis beams (9) for pivoting about a first pivot axis extending transversely below a forward end of the chassis beams (9). An upper end of the swivel arm (25) is pivotally receiving a lower forward portion (15) of the driver cabin (7) for pivoting about a second transverse axis extending upwardly of the chassis beams. A first actuator (31) is operatively interposed between the chassis (3) and the driver cabin (7), while a second actuator (35) is operatively interposed between the chassis (3) and at least one of the opposite swivel arms (25). A latch (47) is arranged to be selectively active between at least one of the opposite swivel arms (25) and the chassis (3).