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2003 GMC Sierra 2500 HD Parts - Wiring & Connectors

OER Parts offers a wide selection of Wiring & Connectors for your 2003 GMC Sierra 2500 HD. OER Parts offers 2003 GMC Sierra 2500 HD Connectors, 2003 GMC Sierra 2500 HD Harnesses, 2003 GMC Sierra 2500 HD Insulation, and 2003 GMC Sierra 2500 HD Wiring.


  2. Electrical & Wiring
  3. Wiring & Connectors

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  • Connectors (2)
  • Harnesses (4)
  • Wiring (1)

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    • EXPERT CUSTOMER SERVICE

    For Enthusiasts By Enthusiasts

    Our friendly customer support staff is standing by and ready to help you. Whether its a product, order, or technical, we have you covered. Submit a request online or contact us.

    1947-1990 GM, Ford, Chrysler; Headlamp Pigtail Socket; 3 Prong; Each; Various Models

    Product#: WE303

    1947-1990 GM, Ford, Chrysler; Headlamp Pigtail Socket; 3 Prong; Each; Various Models

    Product#: WE303

    1947-1990 GM, Ford, Chrysler; Headlamp Pigtail Socket; 3 Prong; Each; Various Models

    MSRP: $4.99 ea
    LEARN MORE
    H4 - 4 Headlamp System Wiring Upgrade Set

    Product#: MX01133

    H4 - 4 Headlamp System Wiring Upgrade Set

    Product#: MX01133

    H4 - 4 Headlamp System Wiring Upgrade Set

    MSRP: $24.99 set
    LEARN MORE
    Front Fender Wire Harness Straps; 2-1/4" Long; Black Nylon

    Product#: K0076

    Front Fender Wire Harness Straps; 2-1/4" Long; Black Nylon

    Product#: K0076

    Front Fender Wire Harness Straps; 2-1/4" Long; Black Nylon

    MSRP: $4.99 pr
    LEARN MORE
    1956-96 AMC, Chrysler, GM, Ford; Wiring Connector; 2-Terminal; Female; Various Applications

    Product#: A17690

    1956-96 AMC, Chrysler, GM, Ford; Wiring Connector; 2-Terminal; Female; Various Applications

    Product#: A17690

    1956-96 AMC, Chrysler, GM, Ford; Wiring Connector; 2-Terminal; Female; Various Applications

    MSRP: $7.99 ea
    LEARN MORE
    1930-2002 GM, Chrysler, Ford, Universal Under Hood and Trunk Lamp; with Bulb and Wiring

    Product#: TF900114

    1930-2002 GM, Chrysler, Ford, Universal Under Hood and Trunk Lamp; with Bulb and Wiring

    Product#: TF900114

    1930-2002 GM, Chrysler, Ford, Universal Under Hood and Trunk Lamp; with Bulb and Wiring

    MSRP: $29.99 ea
    LEARN MORE
    9005/9006 - 4 Bulb System Wiring Upgrade Set

    Product#: MX01131

    9005/9006 - 4 Bulb System Wiring Upgrade Set

    Product#: MX01131

    9005/9006 - 4 Bulb System Wiring Upgrade Set

    MSRP: $24.99 set
    LEARN MORE

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