Standard Ignition TS-43 Engine Coolant Temperature Sender - Left

Engine Coolant Temperature Sender for Classic GM Applications

Standard Ignition TS-43 is an engine coolant temperature sender built for vehicles that use a dashboard coolant temperature indicator light. It features a 1/2"-14 NPT thread, a bolt-on attachment method, and a single male round plug-in connector with a male blade terminal for straightforward replacement in the correct application.

With fitment across many Chevrolet, GMC, Buick, Oldsmobile, Pontiac, and Cadillac models, TS-43 is a direct-match solution for owners servicing older GM cooling and warning-light systems.

Key Features

• Engine coolant temperature sender for indicator-light applications
• 1/2"-14 NPT thread size for listed GM fitments
• Single male round connector with male blade terminal
• Bolt-on attachment method
• Factory-calibrated and tested for switch actuation at the specified temperature
• Built with formed bimetallic contact arm and wax-based thermal actuation design

Detailed Description

Standard Ignition TS-43 is engineered for precise temperature-based electrical switching in vehicles that rely on a coolant temperature warning light rather than a gauge sender. The thermal switch design uses calibrated internal components to make electrical contact at the specified lower-temperature set point, helping maintain consistent operation in the original system. Standard Ignition’s manufacturing process includes calibration and testing before release, along with quality control from component production through final assembly. This part cross-references Anchor 8344 for the same application.

Common search terms for this part include Standard Ignition TS-43 engine coolant temperature sender, 1/2-14 NPT coolant temp sender, and GM coolant temperature switch for classic Chevrolet C10, GMC K1500, and Pontiac Firebird applications.

What It Helps Solve

• Inoperative coolant temperature warning light
• Incorrect temperature switch actuation in the cooling warning circuit
• Hard-to-match replacement for older GM threaded sender applications
• Faulty sender causing inconsistent dashboard temperature-light behavior
• Service issues on classic Chevrolet, GMC, Buick, Oldsmobile, Pontiac, and Cadillac models

Installation Notes and Tips

Verify the vehicle uses a coolant temperature indicator light and confirm the 1/2"-14 thread before installation. Match the connector style and terminal configuration to the original unit, and inspect the harness plug for corrosion or looseness before connecting the new sender. This part is listed for many applications including Chevrolet C10, GMC K1500, and Pontiac Firebird models, so confirm year, engine, and emissions notes against the vehicle listing before service.

Quality Assurance

Standard Ignition states that each unit is calibrated and tested to confirm switch actuation at the specified temperature. The brand also notes complete quality control throughout manufacturing, from component selection to finished product.