OER Parts offers a wide selection of Electrical & Wiring Components for your 1964 GMC 2500 Series. OER Parts offers 1964 GMC 2500 Series Sensors, 1964 GMC 2500 Series Coolant Temperature Sensor, 1964 GMC 2500 Series Oil Level Sensor, 1964 GMC 2500 Series 4 Pulse Speed Sensor, 1964 GMC 2500 Series AC pressure Sensor, and 1964 GMC 2500 Series Knock Sensor.