The 1964-1966 GM Truck Door Latch - RH (Right Hand) refers to a specific component used in General Motors trucks produced during this period. Here's what you need to know about it:

1. Function: The door latch is an essential part of the vehicle's door mechanism that secures the door shut when it is closed. It engages with the door striker to keep the door securely closed while the vehicle is in motion, ensuring safety and security for the occupants.

2. Location: The door latch is located within the door assembly, typically near the edge of the door where it meets the vehicle's body when closed. It consists of several mechanical components, including levers, springs, and locking mechanisms, that work together to latch and unlatch the door.

3. Design: The door latch is designed to withstand repeated use and provide reliable operation over the vehicle's lifespan. It is typically made of metal, such as steel or cast iron, to provide strength and durability.

4. Compatibility: The 1964-1966 designation indicates the years during which this specific style of door latch was commonly used in GM trucks. The "RH" designation specifies that it is intended for use on the right-hand (passenger side) door of the vehicle.

5. Installation: Installing or replacing the door latch typically involves removing the door panel and accessing the latch mechanism inside the door. The new latch is then installed and secured in place using appropriate fasteners and hardware.

6. Importance: The door latch is a critical component for the safe operation of the vehicle, as it ensures that the doors remain securely closed while the vehicle is in motion. A properly functioning door latch helps prevent the door from opening unexpectedly and reduces the risk of accidents or injuries.

In summary, the 1964-1966 GM Truck Door Latch - RH is an essential component of the door assembly in General Motors trucks from this era, providing reliable security and functionality to ensure the safety and convenience of the vehicle's occupants.