B4000 SE Regular Cab 4WD V6-4.0L OHV (1999)
Air Register: Service and Repair
Plenum Chamber
1. Remove the instrument panel.
2. Drain the radiator.
3. Disconnect the heater hoses from the heater/evaporator core.
4. Remove the heater/evaporator core housing.
5. Remove the nuts.
Tightening torque
3.4 - 4.8 N.m (35 - 49 kg.cm, 31 - 42 in.lb).
6. Remove the plenum chamber.
7. Install in reverse order of removal.
1. Lubricate all hoses and fittings.
