Defrost/Vent Damper

'88 K1500 - The actuator that moves the damper for inside air to go to the defroster, vent, or floor has gotten weak (checked to see that the damper itself moves easily.) I can find a new actuator at any store for the blend door (mixes cool and hot air from the heater core) but can't find any references to the 'mode actuator' nor anybody that carries one. I haven't had both actuators out but they look the same. I'm not buying the blend door actuator unless I know it'll work as the mode actuator as well. Anybody seen this part available? (got a P/N?)

ACDelco Part # 15-72139 is the for the mode door (defrost, vent, floor) and ACDelco Part # 15-71937 for the blend door.

You can get it from www.rockauto.com or find your local AC Delco store and www.acdelco.com

//2000CAYukon