Heater Distributor Case And Core Replacement - GMC G Service Manual

1A-18 HEATING
140. Hose — Outlet
141. Hose — Inlet
142. Radiator
Figure 19 — Heater Hose Routing
The heater core can be damaged near the tube attach­
ment seams if force is applied on them. If the heater hoses
do not come off, cut the hoses forward of the core tubes.
Cut the hose on the core tubes to remove.
0
Important
• Draw hoses tight to prevent sagging or rubbing
against other components. Route hoses through all
clamps as installed originally.
HEATER DISTRIBUTOR CASE AND
CORE REPLACEMENT
H Remove or Disconnect (Figures 18 through
1. Battery ground cable.
2. Coolant recovery tank.
• Refer to ENGINE COOLING (SEC.
3. Heater core hoses (140 and 141) (figures 19, 20, 21
and ).
22
• Place a clean pan under the vehicle to catch
any coolant spillage.
• Plug the hoses.
• Allow coolant in the core to drain into the pan.
4. Heater distributor duct (134) (figure 23).
• Remove the screws that hold the distributor
duct to the distributor case and the distributor
duct to the engine cover.
5. Engine housing cover.
• Refer to INTERIOR TRIM (SEC. 10A4).
. Instrument panel.
6
7. Lower the steering column.
• Refer to STEERING COLUMN (SEC. 3B4).
• Raise and support the right side of the instru­
ment panel.
4.3L, 5.0L, and 5. 7L (TBI) Engines
Figure 20 —■ Heater Hose Routing — 5.7L
B ).
6 1
Figure 21 — Heater Hose Routing — 6.2L Engine
. Defroster duct (130) to distributor case (124) attach­
8
ing screws.
9. Distributor to heater case screws.
(Carbureted) Engine
140. Hose - Outlet
141. Hose - Inlet
142. Radiator
B-08612
L00179