GMC Sierra 2500 HD2022 Owner's Manual page 7

6 Introduction
23. Data Link Connector (DLC) (Out of View).
See Malfunction Indicator Lamp (Check
Engine Light) 0 116.
24. Electric Parking Brake 0 245.
25. Fog Lamps 0 143 (If Equipped).
Instrument Panel Illumination Control
0 145.
Exterior Cargo Lamps 0 144.
Exterior Lamp Controls 0 139.
Task Lighting 0 144 (If Equipped).