213-3521 Dual Knock Sensors Kit Fit 1999-07 Chevy Tahoe Suburban GMC 4.8 5.3 6.0

Dual Knock Sensors Kit for Chevy and GMC

The Dual Knock Sensors Kit (Part Number 213-3521) detects engine knock and transmits accurate voltage signals to the engine control module, designed as a direct replacement for 1999–2007 Chevy Tahoe, Suburban, and GMC models with 4.8L, 5.3L, and 6.0L V8 engines.

Overview

This Dual Knock Sensors Kit restores accurate knock detection for GM LS-based V8 engines from 1999 to 2007. It sends clean voltage signals to the ECU so timing adjustments prevent detonation and engine damage. A direct-fit solution for Chevy Tahoe, Suburban, and GMC Yukon/XL 1500 and 2500 series with 4.8, 5.3, and 6.0-liter engines.

Built For Performance

• Includes two knock sensors for complete bank 1 and bank 2 coverage
• Piezoelectric sensing element delivers rapid voltage change for instant knock detection
• Sealed connector body resists moisture, oil, and heat for long service life
• Pre-greased threads and harness with OE-style plug for straightforward installation
• Corrosion-resistant terminals maintain signal integrity in harsh underhood conditions
• Matches factory calibration to work seamlessly with GM ECU knock control strategy

Fits These Machines

• for 1999–2007 Chevy Tahoe
• for 1999–2007 Chevy Suburban 1500 and 2500
• for 1999–2007 GMC Yukon and Yukon XL 1500/2500
• for 1999–2007 GMC Sierra 1500 and 2500 with 4.8L, 5.3L, 6.0L V8

On-The-Job Use

• Replacing sensors that trigger DTCs P0327, P0332, or P0335 on GM Gen III engines
• Restoring proper ignition timing under load during towing or heavy acceleration
• Engine rebuilds and LS swaps where old sensors are damaged during removal
• Routine replacement when intake manifold is removed for gasket service
• Diagnostic replacement to eliminate knock-related misfire or hesitation

Specs At A Glance

Good To Know

Q: Can I install this knock sensor kit without removing the intake manifold? A: On these GM V8 engines, the knock sensors are located under the intake manifold, so removal of the intake is required for access; replacement of the intake gaskets at the same time is recommended.

Q: Will this dual sensor kit clear DTC P0332 or P0327? A: Yes, when the fault is caused by a failed sensor or corroded harness, installing this kit along with cleaning the sensor bore and applying dielectric grease often resolves those codes.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.