1973 GMC MODELS COVERED: C15/C1500 Pickup, C15/C1500 Suburban, C25/C2500 Pickup, C25/C2500 Suburban, C35/C3500 Pickup, Jimmy, K15/K1500 Pickup, K15/K1500 Suburban, K25/K2500 Pickup, K25/K2500 Suburban, K35/K3500 Pickup, Transmode, P15/P1500 Van, P25/P2500 Van, P35/P3500 Van, G15/G1500 Van, G25/G2500 Van, G35/G3500 Van.