Standard Ignition US-588 Ignition Switch

Ignition Switch for 1999 Silverado and Sierra

Standard Ignition US-588 is a column-mounted ignition switch built for direct replacement service on select 1999 Chevrolet Silverado 1500, Silverado 2500, GMC Sierra 1500, and Sierra 2500 trucks. It uses a snap-fit attachment, a black plastic finish, and copper alloy conductors to support reliable electrical transfer in daily repair work.

Key Features

• Column-mounted ignition switch for select 1999 Chevrolet Silverado and GMC Sierra applications
• Snap-fit attachment method for OE-style installation
• Black plastic finish with rectangular connector shape
• 4 connectors with male and female terminals
• 19 blade terminals for proper electrical switching interface
• Copper alloy conductors for low-resistance electrical conductivity
• 100% tested for mechanical and electrical switching performance

Detailed Description

Standard Ignition US-588 is engineered as an ignition switch replacement for trucks that use a column-mounted design. The switch is built with high-grade materials and copper alloy conductors to help maintain consistent electrical flow, while the tested switching performance supports dependable operation in service repairs. This part cross-references Monroe Shocks & Struts (e.g., 1S5919, CS947) for the same application.

Compatible With 1999 Chevrolet Silverado 1500, column; 1999 Chevrolet Silverado 2500, column; 1999 GMC Sierra 1500, column; and 1999 GMC Sierra 2500, column. Standard Ignition US-588 is a direct-fit ignition switch option for technicians and owners servicing these GM trucks.

Common Problems This Part Can Address

• Intermittent or no-start conditions caused by a worn ignition switch
• Accessory or ignition circuit power loss at the column
• Key position issues such as inconsistent crank or run operation
• Electrical contact wear inside the original switch assembly
• Switching faults that affect starting and vehicle electrical function

Installation Notes and Tips

Verify column-mounted switch configuration, connector count, terminal style, and vehicle application before installation. Compare the original connector layout and terminal arrangement to the US-588 to confirm match-up on 1999 Chevrolet Silverado and GMC Sierra trucks. Follow factory service procedures for steering column access, electrical disconnection, and switch alignment during replacement.

Quality Assurance

Standard Ignition builds this switch with robust materials and tests each unit for mechanical and electrical performance to support consistent service results. The US-588 is manufactured to meet the demands of professional repair use.