Visual Inspection

MECHANICAL	ELECTRICAL
Tire condition, pressures, etc Driveline, engine, transmission, suspension components (correct installation, damage, etc)	Fuses Harnesses/connectors Terrain response switchpack Engine control module Transmission control module Anti-lock brake system control module Rear differential control module CAN bus circuits

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the cause is not visually evident, check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.