Standard Ignition HLS1788 Headlight Switch

Headlight Switch for GMC Sierra and Silverado

The Standard Ignition HLS1788 is a replacement headlight switch built for specific GMC Sierra and Chevrolet Silverado applications with security lighting. It uses a plug-in connector design with 12 terminals for a direct electrical interface and a secure snap-fit attachment.

• Headlight switch function for exterior lighting control
• 12-terminal layout with male pin terminals
• Female connector, 1 connector, plug-in style
• Snap-fit attachment method for a secure fit
• Black and chrome plastic finish
• Standard Ignition HLS1788 replacement part

Detailed Product Overview

Standard Ignition HLS1788 is a headlight switch designed for vehicles equipped with security lighting. It is built with a plastic housing, black and chrome finish, and a pin-style terminal design to match the electrical requirements of the original switch. This part number is used in 2020-2023 GMC Sierra 1500, Sierra 2500 HD, and Sierra 3500 HD applications, as well as 2022 Chevrolet Silverado 1500 LTD, Silverado 2500 HD, and Silverado 3500 HD models with security lighting. This part cross-references OE-style numbers such as 84526547 and HL7813 for the same application.

What This Part Helps Address

• Headlights that do not switch on or off correctly
• Intermittent lighting control at the dash switch
• Worn or damaged switch contacts
• Electrical connection issues at the headlight switch
• Replacement needs for security-lighting-equipped trucks

Installation Notes and Tips

Compatible With 2020-2023 GMC Sierra 1500, N/A, w/ Security Lighting; 2020-2023 GMC Sierra 2500 HD, N/A, w/ Security Lighting; 2020-2023 GMC Sierra 3500 HD, N/A, w/ Security Lighting; 2022 Chevrolet Silverado 1500 LTD, N/A, w/ Security Lighting; 2022 Chevrolet Silverado 2500 HD, N/A, w/ Security Lighting; and 2022 Chevrolet Silverado 3500 HD, N/A, w/ Security Lighting. Verify the connector style, terminal count, and security-lighting configuration before installation. Match the original switch layout and terminal orientation to ensure proper electrical connection on GMC Sierra and Chevrolet Silverado trucks.

Quality Assurance

Standard Ignition replacement electrical components are built to meet application-specific fitment requirements and OE-style connection details. The HLS1788 follows the listed terminal, connector, and attachment specifications for the confirmed vehicle applications.