Diagnostic Procedure
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Suburban, and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: DTC P0116: Engine Coolant Temperature Sensor Performance - Avalanche, Suburban & Yukon XL (Steps 1-3)
Fig 2: DTC P0116: Engine Coolant Temperature Sensor Performance - Avalanche, Suburban & Yukon XL (Steps 4-10)