Standard Ignition US-275 Ignition Switch

Ignition Switch for Column-Mount Applications

Standard Ignition US-275 is a column-mounted ignition switch built for direct replacement service on select Chevrolet, GMC, and Isuzu vehicles. It uses a bolt-on attachment, a rectangular male connector, and 12 female blade terminals for a secure electrical interface.

Fits 1995-1996 Chevrolet Blazer, 1995-1996 Chevrolet S10, 1996 Chevrolet Astro, 1996 Chevrolet Express 1500, 1996 Chevrolet Express 2500, 1996 Chevrolet Express 3500, 1996 Chevrolet G30, 1996 Chevrolet S10, 1995-1996 GMC Jimmy, 1996 GMC Safari, 1996 GMC Sonoma, and 1996 Isuzu Hombre.

Key Features

• Standard Ignition US-275 ignition switch for column mounting
• Bolt-on attachment method for secure installation
• Rectangular male connector with 1 connector interface
• 12 female blade terminals for electrical connection
• Copper alloy conductors for strong electrical conductivity and low resistive loss
• 100% tested for mechanical and electrical switching performance

Detailed Product Overview

This ignition switch is engineered with durable materials to meet service demands in ignition system repair. The internal copper alloy conductors support consistent current flow, while the switch construction is verified through testing for both mechanical actuation and electrical switching function. Standard Ignition US-275 is a practical replacement for vehicles that use a column-mounted ignition switch layout, including Chevrolet Blazer, Chevrolet S10, GMC Sonoma, and related applications.

This part cross-references 1S6267 and CS593 for the same application.

Common Problems This Part Can Address

• Intermittent no-start conditions caused by worn ignition switch contacts
• Accessory or ignition circuit power loss when turning the key
• Key position issues such as failure to engage start or run circuits
• Electrical switching faults from heat- or wear-damaged internal components
• Starting system complaints traced to the column ignition switch assembly

Installation Notes and Tips

Verify the vehicle’s column-mounted switch configuration, connector style, and terminal layout before installation. Confirm fitment for the exact year and model, especially on 1995-1996 Chevrolet Blazer and S10 applications and 1996 GMC Sonoma and Isuzu Hombre listings. On Express van applications, review the listed notes for neutral safety switch with harness and radio capacitor requirements.

Quality Assurance

Standard Ignition states that this switch is built from high-grade materials and tested for mechanical and electrical performance before release. The design focuses on proper fit and reliable switching function in service use.