LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1991 >> Syclone V6-262 4.3L Turbo >> Repair and Diagnosis >> Heating and Air Conditioning >> Heater Core >> Service and Repair >> Heater Core Replacement
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Heater Core Replacement

HEATER CORE REPLACEMENT

Air Distribution System Component View:




Heater Assembly Component View:






REMOVE OR DISCONNECT
1. Coolant from the radiator.
2. Inlet and Outlet Hoses. Refer to "Heater Hose Replacement".
- Plug or cap the hoses to prevent spillage.
3. Rear cover and screws.
4. Brackets.
5. Core.

INSTALL OR CONNECT
1. Core.
2. Brackets.
3. Rear cover and screws.

TIGHTEN
- Screws to 3 Nm (27 lb in).

4. Inlet and Outlet Hoses. Refer to "Heater Hose Replacement".
5. Coolant to the radiator.