GM Service Manual Online
For 1990-2009 cars only

Engine Coolant Thermostat Replacement LDK/A20NHT


Object Number: 2019964  Size: SH

Callout

Component Name

Preliminary Procedures

  1. Remove the cooling fluid. Refer to Cooling System Draining and Filling.
  2. Remove the radiator outlet hose. Refer to Radiator Outlet Hose Replacement.
  3. Remove the radiator surge tank engine hose. Refer to LINK.

1

Engine Coolant Thermostat Fastener (Qty: 2)

Caution: Refer to Fastener Caution in the Preface section.

Tighten
X N·m (X lb in)

2

Engine Coolant Thermostat

Engine Coolant Thermostat Replacement Diesel


Object Number: 2018769  Size: MF

Callout

Component Name

Preliminary Procedure

  1. Drain the cooling system. Refer to Cooling System Draining and Filling.
  2. Disconnect any electrical connectors.
  3. Disconnect the radiator inlet coolant hose.
  4. Disconnect the coolant air bleed hose.
  5. Remove the engine coolant outlet pipe. Refer to Engine Coolant Outlet Pipe Replacement.

1

Engine Coolant Thermostat

Procedure

  1. Replace the O-ring seal.
  2. After installation, Fill the cooling system. Refer to Cooling System Draining and Filling.
  3. After repairs, inspect cooling system for leaks.