Standard Ignition TW-40 Turn Signal Switch

Turn Signal Switch for Classic GM Applications

Standard Ignition TW-40 is a new turn signal switch built for older Chevrolet, GMC, Buick, Oldsmobile, and Pontiac applications that require dependable electrical switching at the steering column. It is a direct-fit service part for select vehicles including Chevrolet P10, P20, P30, G10, G20, G30, Malibu, Camaro, Impala, and Pontiac GTO applications.

Built with copper alloy conductors and tested for mechanical and electrical performance, this TW-40 turn signal switch is made for service work where consistent signal operation matters. It also cross-references Standard Ignition S3245 for the same application.

Key Features

• New turn signal switch for steering column service
• Male connector gender with 4 connector cavities
• 27 blade terminals with male terminal ends
• Copper alloy conductors for strong electrical conductivity and low resistive loss
• 100% tested for switching performance before release
• Fits select Chevrolet, GMC, Buick, Oldsmobile, and Pontiac vehicles
• Standard Ignition TW-40 part number for catalog and repair lookup

Detailed Description

Standard Ignition TW-40 is engineered for vehicles that need a reliable replacement turn signal switch in the steering column assembly. The robust construction and copper alloy conductor design support stable electrical transfer, while the tested switch function helps confirm proper signal and circuit operation. This part is listed for a wide range of classic GM platforms, including 1966-1968 Chevrolet Bel Air, Caprice, Camaro, Impala, El Camino, and Malibu, plus 1967-1968 Buick, Oldsmobile, and Pontiac models such as LeSabre, Riviera, Cutlass, Firebird, GTO, and Tempest.

For fitment-specific searches, this part is also relevant for Chevrolet P10, P20, and P30 vans and GMC P1500, P2500, P3500 applications. The TW-40 is a practical choice when replacing a worn or intermittent turn signal switch on older GM steering columns.

What It Helps Fix

• Turn signals that stop working or operate intermittently
• Loss of electrical continuity in the steering column switch circuit
• Worn internal switch contacts causing inconsistent signal function
• Column switch failures on classic Chevrolet, GMC, Buick, Oldsmobile, and Pontiac vehicles
• Service issues on vehicles needing a replacement TW-40 turn signal switch

Installation Notes and Fitment

• Fits 1975-1990 Chevrolet P30, w/ Tilt Steering Wheel; Hazard Knob Not Included
• Fits 1980-1990 GMC P3500
• Fits 1975-1989 Chevrolet P20, w/ Tilt Steering Wheel; Hazard Knob Not Included
• Fits 1980-1989 GMC P2500
• Fits 1980-1981 Chevrolet G10, Not compatible with vehicles equipped with a Tilt Wheel.
• Fits 1980-1981 Chevrolet G20, Not compatible with vehicles equipped with a Tilt Wheel.
• Fits 1980-1981 Chevrolet G30, Not compatible with vehicles equipped with a Tilt Wheel.
• Fits 1980-1981 GMC G1500, Not compatible with vehicles equipped with a Tilt Wheel.
• Fits 1980-1981 GMC G2500, Not compatible with vehicles equipped with a Tilt Wheel.
• Fits 1980-1981 GMC G3500, Not compatible with vehicles equipped with a Tilt Wheel.
• Fits 1975-1980 Chevrolet P10, w/ Tilt Steering Wheel; Hazard Knob Not Included
• Fits 1980 GMC P1500
• Fits 1976 Oldsmobile Cutlass Salon
• Fits 1967-1968 Buick LeSabre, Riviera, and Skylark; Chevrolet Bel Air, Camaro, Caprice, Impala; Oldsmobile 98, Cutlass, Delta 88, and Toronado; Pontiac Bonneville, Catalina, Firebird, Grand Prix, GTO, LeMans, and Tempest, w/o Cornering Lights
• Fits 1966-1968 Chevrolet El Camino
• Fits 1966-1967 Chevrolet Malibu
• Fits 1966 Chevrolet Bel Air and Caprice, Compatible with vehicles with tilt steering wheel.

Verify steering wheel type, hazard knob requirements, and cornering light configuration before installation. This part is listed for specific GM applications only, and fitment varies by model and steering column setup.

Quality Assurance

Standard Ignition builds this switch with durable materials and copper alloy conductors, then tests each unit for mechanical and electrical switching performance. That validation supports consistent service results on older GM turn signal systems.