GM Service Manual Online
For 1990-2009 cars only

Object Number: 2025338  Size: MF

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

Vehicle Zoning Table

Callout Numbers

Zone Description

100-199

Engine compartment- All forward of the instrument panel

Note: 001-099 are additional for the engine compartment - ONLY to be used if all 100-199 items are used

200-299

Within the instrument panel area

300-399

Passenger compartment - From instrument panel to the rear wheelhouse

400-499

Utility rear tray- From the rear wheelhouse to the rear of the vehicle

500-599

Within the left front door

600-699

Within the right front door

900-999

Within the endgate