GM Service Manual Online
For 1990-2009 cars only

Coolant Bypass Hose Replacement LH2

Removal Procedure


    Object Number: 1285939  Size: SH
  1. Drain the cooling system. Refer to Cooling System Draining and Filling .
  2. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  3. Compress the clamp, and remove the heater outlet hose (3) from the thermostat housing in order to gain access to the bypass hose.

  4. Object Number: 1285940  Size: SH
  5. Compress the clamps (1, 3) and remove the bypass hose (2) from the water outlet housing and the front cover.

Installation Procedure


    Object Number: 1285940  Size: SH
  1. Compress the clamps (1, 3) and install the bypass hose (2) to the water outlet housing and the front cover.

  2. Object Number: 1285939  Size: SH
  3. Compress the clamp, and install the heater outlet hose (3) to the thermostat housing.
  4. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  5. Fill the cooling system. Refer to Cooling System Draining and Filling .
  6. Check the cooling system for leaks.