Standard Ignition TW-45 Turn Signal Switch

Turn Signal Switch for Classic GM Trucks

Restore reliable signaling with the Standard Ignition TW-45 turn signal switch. This new replacement uses copper alloy conductors for strong electrical flow and is built with durable materials for service use on classic Chevrolet and GMC trucks and SUVs.

Fits 1973-1983 Chevrolet Blazer, 1973-1983 Chevrolet C10, 1973-1983 Chevrolet C10 Suburban, 1975-1983 Chevrolet C20, 1973-1983 Chevrolet C20 Suburban, 1975-1983 Chevrolet C30, 1982-1983 Chevrolet G10, 1982-1983 Chevrolet G20, 1982-1983 Chevrolet G30, 1975-1983 Chevrolet K10, 1973-1983 Chevrolet K10 Suburban, 1975-1983 Chevrolet K20, 1973-1983 Chevrolet K20 Suburban, 1977-1983 Chevrolet K30, 1975-1983 Chevrolet K5 Blazer, 1982-1983 Chevrolet S10, 1983 Chevrolet S10 Blazer, 1979-1983 GMC C1500, 1979-1983 GMC C1500 Suburban, 1979-1983 GMC C2500, 1979-1983 GMC C2500 Suburban, 1979-1983 GMC C3500, 1982-1983 GMC G1500, 1982-1983 GMC G2500, 1982-1983 GMC G3500, 1973-1983 GMC Jimmy, 1979-1983 GMC K1500, 1979-1983 GMC K1500 Suburban, 1979-1983 GMC K2500, 1979-1983 GMC K2500 Suburban, 1979-1983 GMC K3500, and 1982-1983 GMC S15, with notes for non-tilt-wheel applications on select S10 and S15 models.

Key Features

• Standard Ignition TW-45 turn signal switch
• Male connector gender with 2 connector cavities
• 8 male blade terminals for electrical connection
• New replacement part for service repair
• 100% tested for mechanical and electrical switching performance
• Copper alloy conductors for low-resistance electrical transfer

Detailed Description

The Standard Ignition TW-45 is a turn signal switch for classic Chevrolet and GMC applications where dependable signaling and switch operation matter. It is built with robust materials and copper alloy conductors to support consistent electrical conductivity, while factory-style testing helps verify both mechanical movement and electrical switching before it reaches the vehicle. This part number is also referenced as TW-45 in catalog listings for easier identification during repair work.

This part cross-references Four Seasons 55236 for the same application.

Common Problems It Can Help Solve

• Turn signals that do not activate or cancel correctly
• Intermittent signal operation caused by worn internal contacts
• Electrical switching issues in the steering column circuit
• Dim or inconsistent signal response from poor conductivity
• Failure of the original switch from age-related wear

Installation Notes and Tips

Verify connector style, terminal count, and vehicle application before installation. This switch uses male terminals and a 2-cavity connector layout, so matching the existing harness is important. Select 1982-1983 Chevrolet S10, 1983 Chevrolet S10 Blazer, 1982-1983 GMC S15, and 1983 GMC S15 Jimmy applications note non-compatibility with tilt-wheel vehicles.

For best results, compare the original switch and connector configuration to the TW-45 before replacement. The part number TW-45 is commonly searched for classic Chevrolet C10 and GMC K1500 turn signal switch repairs, especially on non-tilt-wheel trucks and SUVs.

Quality Assurance

Standard Ignition backs this replacement with a design focused on technician needs, using durable materials and tested switching performance to support dependable service on Chevrolet C10, GMC K1500, and related GM applications.