Reference Information

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.

Schematic Reference

Transfer Case Control Wiring Schematics
Engine Controls Wiring Schematics for 5.3L (L83) or 6.2L (L86)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Transfer Case Description and Operation

Electrical Information Reference

Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-49742 Battery Voltage B+ and Ground Source Harness
J-35616 GM-Approved Terminal Test Kit

For equivalent regional tools, refer to Special Tools .