The heater door control on a Blazer can be replaced by purchasing a new one. The heater vent will pop out with a little nudge from a flat tipped screw driver. Then insert the new heater vent door control.
how hard is it to replace the blending door
The heater control valve (temp blend door) is located behind the dash assembly. The dash assembly has to come out to gain access to it.
It does not use a cable. The heater blend door is operated by a electric motor. The complete dash assembly needs to be removed to gain access to the unit.
Check heatertreater.net for diagnostic information and a fix for the blend door/actuator problems endemic to this model.
You may have a stopped up heater core, or it may be a faulty heater door or heater door control. Answer: Check coolant level. Replace thermostat. Check heater control cable, located under small cover above the the passenger floorboard, near the console.
The heater blend door is not run by vacuum. It is run by an electric actuator.
Need to know inside or outside door handle.
The heater temp blend door actuator is located behind the dash assembly, attached to the top of the HVAC box. Unfortunately, the entire dash assembly must be removed to gain access.
Replace the hinge pins and bushings.
You can replace the rear vent window on a 2001 Chevy Blazer LS 4x4, 2 door with Direct Fit Power Window Regulators.
in the door lock itself...kinda tricky to get to though
Remove the dash assembly to gain access to the blend door actuator.