P0327 Code: Knock Sensor Low Input Causes & Fix
Learn what triggers the P0327 knock sensor low-input code, how serious it is, and how to diagnose the sensor, connector and wiring step by step before replacing parts.
Jul 27, 2026
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2021 GMC Sierra 1500 Knock Sensor
5 itemsGet a reliable Knock Sensor for your vehicle at A-Premium. Our high-quality sensors are designed to accurately detect engine knocking, helping to prevent costly damage. Browse our selection today and enjoy fast, free shipping on your order.
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Walker ProductsPart # 242-1391
Walker Products 242-1391 Ignition Knock (Detonation) Sensor
4.329 Reviews
$26.99
Low stock: Only 4 left
StandardPart # KS211
Standard KS211 Ignition Knock (Detonation) Sensor
4.448 Reviews
$22.99
StandardPart # KS507
Standard KS507 Ignition Knock (Detonation) Sensor
4.448 Reviews
$35.99
Low stock: Only 2 left
StandardPart # KS437
Standard KS437 Ignition Knock (Detonation) Sensor
4.448 Reviews
$28.99
Walker ProductsPart # 242-1329
Walker Products 242-1329 Ignition Knock (Detonation) Sensor
4.329 Reviews
$27.99