GMC 1982 Light Duty Truck Service Manual page 36

CONTROL CABLES (Fig. 1 A -1 6 , 1 A -1 7 )
C-K M odels
Replacem ent
1. Disconnect the battery ground cable.
2. Remove the instrument panel bezel.
3. Remove the control to instrument panel screws.
4. Raise or lower control as necessary to remove cable
push nuts and tab attaching screws.
5. Remove glove box and door as an assembly.
6. Remove cable push nut and tab attaching screw at door
end of cable.
7. Remove cable from retaining clip and remove cable
assembly.
8. To install, reverse Steps 1 thru 7. Be careful not to kink
the cable during installation. Be sure to route the cable
as when removed. Check cable adjustment.
G M odels
R eplacem ent (Fig. 1A -17)
Heater and defroster cable routing and attachment to
control and to distributor case is shown in Fig. 1 A - 17.
If cable adjustment is required, refer to Adjustment,
C-K Series.
A dju stm ent - C-K Series
1. Disconnect the battery ground cable.
2. Remove glove box and door as an assembly.
3. Pry off the appropriate cable eyelet clip and disconnect
the cable from the door.
4. Remove the cable retaining screw.
5. W hile holding the cable with pliers, rotate the
mounting tab on the cable to lengthen or shorten the
cable, whichever is required.
NOTICE: Do not pinch the cable too tightly or damage
to the cable could result.
6. Install the cable, reversing Steps 1 -4 above.
Fig. 1 A-l0--Heater Hose Routing V8
A djustm ent - G V a n
1. Attach inner cable and sheath to I.P. Control.
2. With I.P. installed, move temperature cable to cold and
attach loop on inner cable to tem perature door on
heater case.
3. Attach cable sheath to heater case.
4. Move temperature lever to full heat. This will require
some effort due to force required to slide inner cable
clip to its proper position.
BLOWER SW ITCH
C-K Models
R eplacem ent (Fig. 1A -14)
1. Disconnect the battery ground cable.
2. Remove the instrument panel bezel.
3. Remove the control to instrument panel screws and
lower the control onto the radio.
4. Disconnect the switch electrical harness.
5. Remove the switch attaching screws and remove the
switch.
6. To install, reverse Steps 1-5 above.
G Models
R eplacem ent (Fig. 1A -15)
1. Disconnect the battery ground cable.
2. Disconnect the blower switch wiring harness connector
at the switch.
3. Remove the two switch attaching screws and remove
the switch assembly.
4. To install a new switch, reverse Steps 1 thru 3.
RESISTOR
Replacem ent (Figs. 1A -5 an d 1A -18)
1. Disconnect the wiring harness at the resistor connector.
2. Remove the two resistor mounting screws and remove
the resistor.
3. To install a new resistor, reverse Steps 1 and 2 above.
HEATER 1A-11