Price: $57.78
(as of Sep 22, 2025 10:06:25 UTC – Details)
ACDelco GM Original Equipment Ignition Knock (Detonation) Sensors monitor the engine for pinging or spark knock, and are GM-recommended replacements for your vehicle’s original components. These sensors create a voltage signal based on the vibrations caused by erratic air/fuel mixture combustion; the engine control module uses these signals to adjust the ignition timing and air/fuel mixture. These original equipment ignition knock sensors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.
Sends signals to the engine control module (ECM) to adjust timing
Helps prevent damage to the engine caused by pre-ignition
GM-recommended replacement part for your GM vehicle’s original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function
Customers say
Customers find the knock sensor works well as a direct replacement and appreciate its perfect fit, particularly for 2001 Tahoe 4.8l SFI engines. Moreover, the product receives positive feedback for its quality, value, and ease of installation. However, the code return and engine light aspects show mixed results – while some customers report the check engine light goes off immediately, others experience it coming back on. Additionally, opinions about OEM quality are divided, with some confirming it’s a genuine GM part while others suspect counterfeits.
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