Inspection Procedure

WARNING: This page is about a different car, the 2005 GMC Yukon XL, 2005 Chevrolet Suburban, and 2005 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Water Outlet, Bolts, Thermostat & Coolant Crossover

Courtesy of GENERAL MOTORS CORP.

Inspect the water crossover (308) for the following:
- Corrosion or damage to the gasket sealing surfaces
- Corrosion or damage to the bypass hose fitting
- Corrosion or damage to the heater hose fitting
- Corrosion or damage to the threads of the water outlet
Inspect the thermostat housing (311) for corrosion or damage.