K 1500 1/2 Ton Pickup 4WD L6-250 4.1L VIN D 2-bbl (1982)
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Fig. 24 A/C & heater assembly. C, K, R & V models
With A/C
1.
Disconnect battery ground cable, then drain cooling system.
2.
Disconnect heater hoses at core and plug core tubes.
3.
Remove glove box assembly.
4.
Remove screws at center duct to selector duct/instrument panel. Remove center upper and lower ducts.
5.
Disconnect bowden cable at temperature door.
6.
Remove nuts at selector duct studs (projecting through firewall). Remove selector duct to firewall screw.
7.
Draw selector duct assembly rearward so core tubes clear firewall. Lower assembly sufficiently to remove vacuum lines and harness connections.
8.
Remove selector duct assembly. Disconnect core mounting straps and remove core, Fig. 24.
9.
Reverse procedure to install.