GMC 1986 P-Truck Service Manual page 115

1B-52 AIR CONDITIONING
9. Heater distributor duct.
10. Defroster duct to dash panel attaching screws
(below the windshield).
11. Heater hoses (457).
• Plug to prevent spillage.
12. Three nuts from the bolts that hold the heater
core case to the dash panel and one screw at the
lower right corner (inside).
13. Distributor assembly from the vehicle.
14. Gasket to expose the screws attaching the case
sections together.
15. Temperature cable support bracket.
16. Case attaching screws and separate the case.
^ 4 9 0 . Instrument Panel
491. Control
492. Screw
^ ...
Figure 56—Control Assembly - A/C and Heater
Figure 55—G Blower Motor Cover (Diesel)
492
F-00332
17. Heater core (457).
Install or Connect (Figure 54)
1. New heater core.
2. Screws and case.
3. Temperature cable support bracket.
4. Gasket.
5. Distributor assembly.
6. Heater core nuts to bolts.
7. Heater hoses.
8. Defroster duct to dash panel screws.
9. Heater distributor duct.
10. Temperature cable and vacuum hoses at the
distributor.
11. Right lower instrument panel support bracket.
12. Right side of the instrument panel.
13. Upper and lower instrument panel screws.
14. Radio support bracket screw.
15. Steering column to instrument panel attaching
bolts and raise the column.
16. Engine cover.
17. Battery ground cable.