Standard Ignition US-515 Ignition Switch

Ignition Switch for GM and Isuzu Applications

Standard Ignition US-515 is a column-mounted ignition switch built for reliable electrical switching in service replacement applications. It is a direct-fit option for select Chevrolet Blazer, Chevrolet S10, GMC Jimmy, GMC Sonoma, Isuzu Hombre, and Oldsmobile Bravada models from 1998-1999.

Key Features

• Column-mounted ignition switch with snap-fit attachment method
• 2 rectangular male connectors for straightforward harness connection
• 16 female blade terminals for secure electrical contact
• Copper alloy conductors for low-resistance electrical flow
• 100% tested for mechanical and electrical switching performance
• Built with high-grade materials for consistent fit and function

Detailed Product Overview

Standard Ignition US-515 is engineered as an ignition switch replacement for vehicles that rely on a column-mounted design. The switch uses copper alloy conductors to support strong conductivity and reduced electrical loss, while the snap-fit mounting style helps it seat properly in the steering column assembly. This part number, US-515, is listed for 1998-1999 Chevrolet Blazer, 1998-1999 Chevrolet S10, 1998-1999 GMC Jimmy, 1998-1999 GMC Sonoma, 1998-1999 Isuzu Hombre, and 1998-1999 Oldsmobile Bravada applications. This part cross-references Standard Motor Products (e.g., CS543, KS6163) for the same application.

Common Problems This Part Can Address

• Intermittent no-start condition caused by worn ignition switch contacts
• Accessory or ignition circuits that do not power on consistently
• Key-turn operation that feels inconsistent or fails to engage electrical functions
• Electrical switching faults in the steering column ignition circuit
• Starting issues related to degraded internal switch components

Installation Notes and Tips

Verify connector style, terminal count, and column mounting before installation. Confirm vehicle application by year, make, and model, especially for Chevrolet Blazer and Chevrolet S10 fitments with left-hand drive requirements and Chevrolet Blazer right-hand-drive exclusion. Inspect the harness and column connector for heat damage, corrosion, or loose terminals before installing the new switch. Match the existing ignition switch configuration to the US-515 before final assembly.

Quality Assurance

Standard Ignition states that this ignition switch is built with robust materials and tested for both mechanical and electrical switching performance. The design uses copper alloy conductors to support dependable conductivity in service use.