[Vehicle Fitment]: Compatible with Chevrolet C1500 1988-1990(with Standard Duty Heater), C1500 1991-1991, C2500 1988-1991, C3500 1988-1991, K1500 1988-1990(with Standard Duty Heater), K1500 1991-1991, K2500/K3500 1988-1991; Compatible with GMC C1500 1988-1990(with Standard Duty Heater), C1500 1991-1991, C2500/C3500 1988-1991, K1500 1988-1990(with Standard Duty Heater), K1500 1991-1991, K2500 1988-1991, K3500 1988-1991---Pickup. [Vehicle Fitment]: Compatible with Chevrolet C3500HD 1991-1991, C60 Kodiak 1991-1992, C70 Kodiak 1990-1992; GMC C3500HD 1991-1991, K3500 1988-1991---Cab and Chassis. [Reference Number]: The A-Premium HVAC Heater Core's reference number: 9010215, 94484, 3091251. Before placing an order, verify that the part is compatible with your vehicle using the compatibility system.. [Important Note]: It only fits models without Air Conditioning..
