ACDelco Engine Coolant Temperature Indicator Switch Gold 213-4792 — OEM-fit, Durable Signal

ACDelco Gold 213-4792 (88865045) is an OEM-style engine coolant temperature indicator switch built to restore the factory temperature sensing function in compatible GM vehicles.

This switch monitors engine coolant temperature and signals the vehicle’s engine control and ignition systems when temperature thresholds are reached. As a GM-recommended replacement, it’s designed to match the fit, form, and function of the original factory part so you maintain the vehicle’s intended performance and reliability. The Gold line combines durable materials and precise manufacturing to deliver consistent electrical response and long service life.

How does this switch interact with my vehicle’s systems?

The temperature indicator switch provides a reliable electrical signal tied to coolant temperature, which the engine control module and ignition system use for timing, fuel mixture adjustments, and diagnostics. If the switch fails, those systems can receive incorrect temperature information, leading to degraded performance or diagnostic trouble codes. Replacing a worn switch restores accurate temperature reporting to the vehicle’s systems.

• Directly compatible with specified GM engine coolant circuits
• Sends on/off or resistance-based signal depending on design
• Works with engine management and ignition control inputs

Will this ACDelco Gold part fit my GM vehicle and how reliable is the fit?

This part is manufactured to GM Original Equipment specifications so it matches the OEM thread size, electrical connector interface, and sealing geometry. That means installation is straightforward and the switch seats correctly to prevent leaks or loose electrical connections. Using an OE-style replacement minimizes modification and ensures predictable long-term behavior.

• Built to GM OE dimensions for correct mechanical fit
• Connector and terminal spacing match factory harnesses
• Durable seal design reduces risk of coolant seepage

What should I expect in terms of durability and performance?

The ACDelco Gold series focuses on longevity and consistent electrical response under engine bay conditions. Materials and assembly meet GM-recommended standards to resist vibration, temperature swings, and corrosion. Routine inspection and replacing a failing sensor promptly helps prevent downstream issues related to incorrect coolant temperature data.

• Manufactured for consistent activation at specified temperature thresholds
• Corrosion-resistant contacts and housing materials
• Designed for stable operation across engine temperature cycles

How do I know when to replace the coolant temperature indicator switch?

Common signs include irregular temperature gauge readings, engine control errors, or cooling-fan operation that is incorrect or intermittent. If diagnostic trouble codes reference the coolant temperature sensor or related circuits, testing and replacement of the switch is recommended. Using an OE-spec ACDelco Gold part restores reliable signaling to the vehicle systems.

• Erratic temperature gauge or dashboard warnings
• Cooling fan running continuously or not engaging when hot
• Scan tool codes indicating coolant temperature sensor faults

Who is this for: Technicians, DIY enthusiasts, and fleet managers who need a dependable, GM-recommended replacement for the factory coolant temperature indicator switch. Ideal when you want an OE-equivalent component that preserves vehicle diagnostics and engine control behavior without modifications. Choose the ACDelco Gold 213-4792 (88865045) when fit, durability, and correct electrical performance are priorities.