High/Low Shift Components Cleaning And Inspection

WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, and 2018 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: High/Low Shift Components Cleaning and Inspection Points

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
Preliminary Procedure Inspect all components or sub-components and perform any repair procedure necessary to fix the damage. If the damage cannot be repaired, replace the component or sub-component as indicated. Clean all components in cleaning solvent and air dry.
1	Transfer Case Actuator Cam Retaining Ring NOTE: Inspect the ring for wear or damage.
2	Transfer Case Actuator Cam Spacer NOTE: Inspect the spacer for wear or damage.
3	Transfer Case Actuator Cam NOTE: Inspect the cam for wear on the roller surface and damage to the splines. Witness marks on the splines are normal.
4	Transfer Case Control Actuator Shaft NOTE: Inspect the shaft splines for excessive wear. The component must be replaced if damage is found.
5	Transfer Case Actuator Shaft Gear Teeth NOTE: Inspect for chipped teeth, excessively worn gear surfaces, and debris embedded in the root of the teeth. Inspect the shaft splines for excessive wear. Witness marks on the splines are normal.