Standard Ignition US-493 Ignition Switch

Ignition Switch for GM Vans

Standard Ignition US-493 is a column-mounted ignition switch built for service replacement on select Chevrolet and GMC vans from 1999-2000. It uses a bolt-on attachment, a rectangular 2-connector layout, and copper alloy conductors to support consistent electrical transfer in daily repair work.

Key Features

• Column-mounted ignition switch for select Chevrolet Express and GMC Savana applications
• Bolt-on attachment method for secure installation
• Black plastic finish
• 2 male connectors with rectangular shape
• 15 female blade terminals for vehicle-specific electrical interface
• Copper alloy conductors for low-resistance electrical flow
• 100% tested for mechanical and electrical switching performance

Detailed Description

Standard Ignition US-493 is engineered as a direct replacement ignition switch for vehicles that use a column-mounted design. The switch construction uses high-grade materials and copper alloy conductors to help maintain stable conductivity and reliable switching action. This part number is used in applications such as the 1999-2000 Chevrolet Express 1500, 1999-2000 Chevrolet Express 2500, 1999-2000 Chevrolet Express 3500, and 1999-2000 GMC Savana 1500, 1999-2000 GMC Savana 2500, and 1999-2000 GMC Savana 3500, with additional coverage for 1999 Chevrolet Astro and 1999 GMC Safari.

This part cross-references AC Delco-style applications such as 1S5920 and CS834 for the same application.

Common Issues This Part Can Address

• Intermittent or failed ignition switch operation
• No-start condition caused by worn internal switch contacts
• Accessory or ignition circuit power loss
• Electrical switching inconsistency at the steering column
• Replacement needs after switch wear or contact degradation

Installation Notes and Tips

Compatible With 1999-2000 Chevrolet Express 1500, column-mounted applications not equipped with a tilt wheel. Compatible With 1999-2000 Chevrolet Express 2500, without anti-theft. Compatible With 1999-2000 Chevrolet Express 3500, column-mounted applications not equipped with a tilt wheel. Compatible With 1999-2000 GMC Savana 1500, column-mounted applications not equipped with a tilt wheel. Compatible With 1999-2000 GMC Savana 2500, column-mounted applications not equipped with a tilt wheel. Compatible With 1999-2000 GMC Savana 3500, column-mounted applications not equipped with a tilt wheel. Compatible With 1999 Chevrolet Astro and 1999 GMC Safari. Verify connector style, terminal count, and column configuration before installation.

Quality Assurance

Standard Ignition builds this ignition switch with robust materials and tests each unit for mechanical and electrical switching performance before release.