Is your Squarebody stuck blowing through the wrong vents? Restore your truck’s climate control system to factory performance with this genuine OEM vacuum actuator diaphragm.
Designed for 1973–1987 Chevrolet and GMC C/K series trucks, this vacuum-untested actuator is the key to fixing "stuck" heater or A/C modes. Many aftermarket replacements are made of inferior materials that fail within months; this original GM-quality unit is built to last and has been verified to hold a firm vacuum seal and actuate smoothly. Whether you are doing a full interior restoration or just trying to get your A/C working for the summer, this part is a critical component for success.
Durability: Genuine OEM construction—avoid the "disposable" plastic of modern aftermarket alternatives.
Simple Install: A direct replacement for your failed or leaking actuator.
Shipping & Service: We know you want to get your A/C blowing cold ASAP. We provide secure, rapid shipping to all lower 48 states, with priority routes for our customers in California and Florida.
