The blend door isn't a single, easily accessible part like a car door. In a 1995 Chevrolet K1500, the "blend door" is actually a component *inside* the HVAC (Heating, Ventilation, and Air Conditioning) system, located within the dashboard. You can't see or easily reach it without removing significant parts of the dash.
To access it for repair (if it's malfunctioning), you'll need to dismantle a portion of the dashboard. This is a fairly involved process, generally requiring mechanical aptitude and specialized tools. Many choose to take their vehicle to a mechanic or HVAC specialist for this kind of repair.
