Chevrolet 1977 light duty truck Service Manual page 73

V A C U U M R E S E R V O IR
(IN E N G I N E C O M P A R T M E N T )
: :
g r a y
= p i n k :
____
H E A T E R AIR
D E F R O S T
: O R A N G E
P O R T NO.
9
2
4
1
8
T O V A CUUM S O R C E
: :
g r a y
DASH P A N E L
H E A T E R T E M P E R A T U R E
DOOR C A B L E
H E A T E R
D IS T R I B U T O R
D U C T
S E L E C T V A L V E O P E I t A T I N G C H A R T
O F F MAX NO RM
H E A T VAC VAC VAC
V E N T V E N T
D E F VAC
A / C - O . S. A IR V E N T
V E N T VA C
H T R AIR VAC VAC
VAC
S O U R C E VAC VAC VA C
H E A T E R C O R E C A S E
H T R D E F O G D E F
VAC V E N T V E N T
V E N T
V E N T VAC
V E N T V E N T
V E N T
V E N T V E N T
V E N T
VAC
VA C VAC