Standard Ignition CBS-1148 Headlight Dimmer Switch - Front

Headlight Dimmer Switch for GM Trucks and SUVs

Standard Ignition CBS-1148 is a new headlight dimmer switch built for vehicles that need dependable lighting and wiper control from a single column-mounted assembly. It is a direct-fit electrical switch for select Chevrolet, GMC, Cadillac, Buick, Hummer, Saab, Oldsmobile, and Isuzu applications, including many 2002-2009 Trailblazer and Envoy models.

For drivers searching for a Chevrolet Trailblazer headlight dimmer switch or a GMC Envoy combo switch assembly replacement, CBS-1148 provides the correct control layout for non-cruise-control applications.

Key Features

• Bolt-on attachment method with a rectangular female connector
• 3 connector cavities, 14 blade terminals, 12-volt operation
• Includes turn signal control, windshield washer spray, windshield wiper delay, and windshield wiper speed functions
• Indicator markings included for clear switch identification
• Latching high beam operator and momentary high beam flasher included
• New switch with 100% electrical and mechanical testing
• Copper alloy conductors for strong electrical conductivity and low resistive loss

Detailed Description

Standard Ignition CBS-1148 is engineered as a service replacement headlight dimmer switch for vehicles that use a combined column switch layout. It supports headlight dimming, turn signal operation, washer spray, and wiper delay/speed control in one assembly. This makes it a practical choice for owners and technicians servicing Chevrolet Silverado, GMC Sierra, Cadillac Escalade, and related GM platforms that require a non-cruise-control switch configuration.

This part cross-references Dorman - HELP 2330860 for the same application. Standard Ignition CBS-1148 is also listed against multiple interchange numbers, helping simplify sourcing when replacing a worn or malfunctioning GM combo switch assembly.

What It Helps Fix

• Intermittent or inoperative high beam switching
• Turn signal control problems at the steering column
• Windshield wiper delay or speed selection issues
• Washer spray switch failure
• Dimmer switch wear from age, heat, or repeated use

Installation Notes and Fitment

Fits 2002-2009 Chevrolet Trailblazer, N/A; not compatible with vehicles equipped with cruise control. Fits 2002-2009 GMC Envoy, N/A; not compatible with vehicles equipped with cruise control. Fits 2003-2006 Cadillac Escalade, N/A; w/o Cruise Control; Combo Switch Assembly. Fits 2003-2006 Chevrolet Silverado 1500, N/A; w/o Cruise Control; Combo Switch Assembly. Fits 2003-2006 GMC Sierra 1500, N/A; w/o Cruise Control; Combo Switch Assembly. Fits 2003-2005 Chevrolet Tahoe, front; w/o Cruise Control; Combo Switch Assembly.

Verify connector shape, terminal count, and cruise-control configuration before installation. This switch uses a bolt-on mounting style and a male blade terminal design, so matching the original connector and column layout is important for proper operation.

Quality Assurance

Standard Ignition states that this switch is fully tested for both mechanical action and electrical performance. The design uses robust materials and copper alloy conductors to support reliable switching under everyday service conditions.