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Vehicle Zoning Strategy

All grounds, in-line connectors, and splices have identifying numbers that correspond to where they are located in the vehicle. The following table explains the numbering system.

GM160996Courtesy of GENERAL MOTORS COMPANY
Callout Numbers Zone Description
100-199 Engine compartment (all forward of the instrument panel)
200-299 Within the instrument panel area (between the bulkhead and the front plane of the instrument panel)
300-399 Passenger compartment (from instrument panel to the back of the 2nd row seats)
400-499 Luggage compartment (from the back of the 2nd row seats to the rear of the vehicle, including any additional rows of seating rear of the 2nd row seats)
500-599 Inline harness connectors to or within the driver door
600-699 Inline harness connectors to or within the front passenger door
700-799 Inline harness connectors to or within the left rear door
800-899 Inline harness connectors to or within the right rear door
900-999 Inline harness connectors to or within the liftgate, lift window, endgate, or rear doors