Chevrolet & GMC "G" Models and "P" Models (1971-74)

Open hood and remove ground cable from battery. Reach up under instrument cluster and disconnect speedometer cable by first depressing tang on rear of speedometer head and pushing, then pulling, cable free from head as tang is depressed. Unplug electrical harness connector from printed circuit. Disconnect oil pressure line from gauge (if equipped) and remove two nuts attaching instrument cluster studs to lower opening in instrument panel, and lift out bottom of cluster. Remove cluster to suitable work area for further disassembly.