GMC 1982 Light Duty Truck Service Manual page 27

1A-2 HEATER
( HEATER I N OFF P O S I T I O N )
HEATER C O N T R O L
A IR OUTLET
X
VIEW
STEERI NG
C O L U M N
I NST P A N E L
HEATER A S M
D A S H P A N E L ------'
C-K MODELS
Fig. 1 A-1--Heater Air Flow Schematic--C-K Models
HEATER A D EFROSTER A S M
VIEW
B
DEFROSTER D U C T A S M
Q ] T E MPE R AT U R E V A L V E [
Qjj DEFR OS TER V A L V E
0 P U R G E V A L V E
H EATER A
D E F R OS T E R A S M
A I R O U T L
A
&
V I E W A
AI R F L O W L E G E N D
! O U T S| D *
\ } M I X E D AIR
W / / / / / / / / A
H EA T E D AIR