How to access blend door actuator bolts on 1997 Chev Suburban

1. Locate the blend door actuator. The actuator is located behind the dashboard, usually on the passenger side. It is a small, rectangular motor with a wiring harness and a linkage arm.
2. Disconnect the battery. Before beginning any work on the electrical system, disconnect the battery to avoid any electrical shorts or other accidents.
3. Remove the dashboard panel. In order to access the blend door actuator, the dashboard panel may need to be removed. Consult the vehicle's repair manual for specific instructions on how to remove the panel.
4. Remove the old blend door actuator. Disconnect the wiring harness and the linkage arm from the old blend door actuator. Remove any mounting screws or bolts that secure the actuator to the dashboard.
5. Install the new blend door actuator. Install the new blend door actuator in the same location as the old actuator. Secure the actuator with any mounting screws or bolts. Connect the wiring harness and the linkage arm to the new actuator.

You must remove the dash to access the blend door motor.

Right side or left ? Electronic Automatic Temperature Control or manual ? Temperature or mode door ?
Temperature Blend Door Actuator - LH Removal and Installation
NOTE: It is not required to install the new LH temperature blend door linkage parts included in the LH temperature blend door actuator service part kit if only the temperature blend door actuator requires replacement and the linkage parts are not broken or binding.
LH temperature blend door actuator and linkage

1. Remove the 2 lower steering column opening cover bolts.

1. Detach the lower steering column opening cover.

1. Disconnect the in-vehicle temperature sensor aspirator hose and electrical connector.

1. Position the instrument panel wire harness away from the LH temperature blend door actuator.

1. Remove the 3 LH temperature blend door actuator screws.

1. Disconnect the LH temperature blend door actuator electrical connector.

1. Remove the LH temperature blend door actuator.

1. Manually operate, and inspect the LH temperature blend door linkage for incorrect placement, binding or damage.

Temperature Blend Door Actuator - RH, Dual-Zone EATC Removal and Installation
NOTE: It is not required to install the new RH temperature blend door linkage parts included in the RH temperature blend door actuator service part kit if only the temperature blend door actuator requires replacement and the linkage parts are not broken or binding.
RH temperature blend door actuator and linkage

1. Disconnect the glove compartment damper from the glove compartment.

1. Remove the glove compartment.

1. Remove the RH lower instrument panel insulator.

1. Remove the RH lower floor console trim panel.

1. Remove the 3 RH temperature blend door actuator screws.

1. Disconnect the RH temperature blend door actuator electrical connector.

1. Remove the RH temperature blend door actuator.

1. Manually operate, and inspect the RH temperature blend door linkage for incorrect placement, binding or damage.
2. Mode Door Actuator - Defrost/Panel/Floor Door
3. Removal and Installation
   NOTE: The defrost/panel/floor mode door actuator can be accessed from below the driver side of the instrument panel.
   NOTE: It is not required to install the new defrost/panel/floor mode door linkage parts included in the defrost/panel/floor mode door actuator service part kit if only the mode door actuator requires replacement and the linkage parts are not broken or binding.
   Mode door actuator and linkage
   1. Remove the 3 defrost/panel/floor mode door actuator screws.
   1. Disconnect the defrost/panel/floor mode door actuator electrical connector.
   1. Remove the defrost/panel/floor mode door actuator.
   1. Manually operate, and inspect the defrost/panel/floor mode door linkage for incorrect placement or damage.
   Mode door actuator linkage only
   
   1. Remove the mode door linkage.
      1. Depress the tab and remove the panel door lever.
      1. Remove the floor/defrost door intermediate lever screw and floor/defrost door intermediate lever.
      1. Pull straight outward to remove the floor/defrost door lever.
   Mode door actuator and linkage
   
   1. NOTE: When installing the mode door actuator, make sure that the panel door lever and floor/defrost intermediate lever are correctly aligned with the mode door actuator cam.
      To install, reverse the removal procedure.

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Salvage yard would probably be your best bet. If it is a part that is common to go bad, aftermarket new parts might be available, and if it is not that old you can always get individual pieces from the dealer.

The most likely problem is either the blend door actuator or a broken blend door itself.
Both are only accessible by complete removal of the instrument panel(dash).
The blend door actuator can be tested with a Chrysler factory scan tool hooked up to the DLC(data link connector). If blend door actuator is working when tested with the factory scan tool, then blend door itself is at fault.
The only other way to test the blend door actuator is to test for 12v at connector, but you would have to remove the instrument panel in order to gain access to the actuator

should be in the center part of the dash look under from the drivers side floor board close to accelerator pedal looking up should be mounted on the side of heater a/c box

clod hot bend door actuator is behind blower motor housing. Outside of housing, not inside blower case..two 7 mm screws hold it in.. be careful not to damage blend door shaft. its plastic..

Either stuck blend door or a bad blend door actuator motor. It's located under the dash. Remove the actuator and move the door by hand to see if it's binding. If it's free, then the problem is with the actuator or linkage.

your blend door actuator gear is slipping. remove actuator and check blend door for free movement. If jammed, you may have to open the system to unjam. If door is free to moe, replace actuator. See procedure below to access blend door. Not sure you need a lift, as long as you can get the 2 nuts off under the truck.

Removal & Installation

1. Position the vehicle on a hoist with the gear selector in NEUTRAL.
2. Remove the left-side quarter trim panel.
3. Remove the parts in the order indicated in the following illustration and table.

Fig. Blend door actuator - auxiliary

(1) Auxiliary line floor pan bracket nut (2 req'd)
(2) Auxiliary housing bolt
(3) Auxiliary housing bolt
(4) Auxiliary housing nut
(5) Auxiliary harness electrical connector
(6) Blend door actuator electrical connector
(7) Screw (3 req'd)
(8) Blend door actuator

To install:

1. Installation is the reverse of the removal procedure.
2. Observe the following tightening specifications:
   
   Auxiliary line floor pan bracket nut (2 req'd), 71 inch lbs. (8 Nm) Auxiliary housing bolts, 62 inch lbs (7 Nm) Auxiliary housing nut, 62 inch lbs (7 Nm)