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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 862 (Engine Cooling System) >> Repair Instructions >> Thermostat Bypass Pipe Replacement Diesel

Thermostat Bypass Pipe Replacement Diesel

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Thermostat Bypass Pipes
GM1729508Courtesy of GENERAL MOTORS COMPANY
  1. Drain the cooling system. Refer to Cooling System Draining and Filling 
  2. Remove the fan pulley. Refer to Fan Pulley Replacement 
  3. Remove Thermostat Bypass Pipe Bolts. 21 N.m (16 lb ft)
  4. Thermostat Bypass Pipe to Turbocharger Outlet Cooler Pipe Clamp. Procedure Reposition the thermostat bypass pipe to turbocharger outlet cooler pipe clamp using the BO-38185 Hose Clamp Pliers. Replace hose clamp if necessary.
  5. Thermostat Bypass Pipe Tip: Install new O-ring seals. Lubricate using clean engine coolant.