Standard Ignition US-451 Ignition Switch

Ignition Switch for Select GM and Saturn Vehicles

Standard Ignition US-451 is a column-mounted ignition switch built with a bolt-on attachment, a rectangular female connector, and 11 male blade terminals. It is engineered for consistent electrical switching and proper mechanical operation in select Chevrolet, GMC, and Saturn applications, including right-hand-drive GM trucks and Saturn L-Series models.

Key Features

• Column-mounted ignition switch with bolt-on attachment
• Black and white plastic finish
• 1 rectangular female connector
• 11 male blade terminals for secure electrical connection
• Copper alloy conductors for low-resistance electrical flow
• 100% tested for mechanical and electrical switching performance

Detailed Product Overview

Standard Ignition US-451 is built for service professionals who need a direct replacement ignition switch with dependable fit and function. The switch uses copper alloy conductors to support strong electrical conductivity and reduced resistive loss, while the robust housing and terminal layout are designed to match the demands of daily vehicle use. This part number, US-451, is listed for select 1999-2005 GMC Jimmy, 1999-2002 Chevrolet Blazer, 1999-2002 Chevrolet S10, 1999-2002 GMC Sonoma, and Saturn L-Series models, including L100, L200, L300, LS, LS1, LS2, LW1, LW2, LW200, and LW300 applications.

This part cross-references Standard-style replacement numbers such as 1S5963 and CS815 for the same application.

What It Helps Fix

• Intermittent no-start conditions caused by a worn ignition switch
• Accessory or ignition circuits that lose power unexpectedly
• Key-turn issues related to internal switch wear
• Electrical contact problems from damaged or high-resistance terminals
• Starting and ignition signal faults in column-mounted systems

Installation Notes and Fitment

Compatible with 1999-2005 GMC Jimmy, right hand drive; 2001-2005 Saturn L300; 2001-2003 Saturn L200; 2001-2003 Saturn LW200; 2001-2003 Saturn LW300; 1999-2002 Chevrolet Blazer, right hand drive; 1999-2002 Chevrolet S10, right hand drive; 1999-2002 GMC Sonoma, right hand drive; 2001-2002 Saturn L100; 2000 Saturn LS; 2000 Saturn LS1; 2000 Saturn LS2; 2000 Saturn LW1; and 2000 Saturn LW2.

Verify connector shape, terminal count, and column mounting before installation. Match the existing switch configuration to the vehicle’s original electrical layout, especially on right-hand-drive GM applications. Use the vehicle service procedure for proper alignment and electrical verification after installation.

Quality Assurance

Standard Ignition states that its ignition switches are built from high-grade materials and tested for both mechanical and electrical switching performance. The US-451 follows that approach with a durable housing and copper alloy conductors for reliable service.