Standard Ignition US-139 Ignition Switch

Reliable Ignition Switch for Select GM Vehicles

The Standard Ignition US-139 ignition switch is designed for dependable performance in a range of GM vehicles including Buick, Chevrolet, Cadillac, and GMC models. This bolt-on ignition switch features a durable aluminum and plastic finish, ensuring long-lasting operation in column-mounted applications.

• Bolt-on attachment method for secure installation
• Black and silver color scheme with aluminum and plastic finish
• Female rectangular connector with one connector for easy wiring
• Eight male blade terminals for reliable electrical connections
• Designed for column mounting in various GM trucks and cars

Product Details and Specifications

The US-139 ignition switch from Standard Ignition is engineered to meet the electrical and mechanical requirements of multiple GM vehicles such as the Chevrolet C10, GMC Sierra, Pontiac Bonneville, and Cadillac DeVille. Its bolt-on design simplifies replacement, while the combination of aluminum and plastic materials provides durability and resistance to wear. The switch includes a single female rectangular connector and eight male blade terminals, ensuring compatibility with factory wiring harnesses. This ignition switch is specifically designed for column mounting, making it suitable for models like the Chevrolet Camaro, Buick Century, and Oldsmobile Cutlass Ciera.

Compatible Vehicles and Applications

• Buick models including Century, LeSabre, and Skylark
• Cadillac DeVille, Eldorado, and Seville
• Chevrolet trucks and cars such as C10, C1500, Camaro, and Impala
• GMC trucks including Sierra and Suburban series
• Oldsmobile Cutlass Ciera and Calais
• Pontiac Bonneville, Firebird, and Grand Prix

Common Issues Addressed by This Ignition Switch

• Intermittent or no start conditions due to faulty ignition switch
• Electrical connection failures causing accessory or ignition power loss
• Wear or damage to original ignition switch terminals or connectors
• Difficulty turning the key or ignition lock cylinder problems
• Replacement for worn or broken column-mounted ignition switches

Installation Notes and Tips

• Ensure vehicle battery is disconnected before installation to prevent electrical shorts
• Verify correct alignment of the bolt-on mounting points on the steering column
• Check connector orientation; the US-139 uses a female rectangular connector with one connector
• Confirm all eight blade terminals are properly seated and secure for reliable operation
• Consult vehicle-specific service manual for detailed removal and installation procedures

Quality Assurance and Warranty

Standard Ignition manufactures the US-139 ignition switch to meet or exceed OEM specifications for fit, form, and function. The part undergoes rigorous testing to ensure durability and reliable electrical performance. While specific warranty details may vary, Standard Ignition typically offers a limited warranty covering defects in materials and workmanship to provide confidence in your replacement part.