Photo 1 of Dual Knock Sensor Kit with Wiring Harness & Intake Manifold Gasket,for Chevy Silverado Avalanche Tahoe, GMC Sierra Yukon, Cadillac Hummer & More Models Replace 12601822 213-3521 89060413

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Photo 1 of Dual Knock Sensor Kit with Wiring Harness & Intake Manifold Gasket,for Chevy Silverado Avalanche Tahoe, GMC Sierra Yukon, Cadillac Hummer & More Models Replace 12601822 213-3521 89060413Photo 2 of Dual Knock Sensor Kit with Wiring Harness & Intake Manifold Gasket,for Chevy Silverado Avalanche Tahoe, GMC Sierra Yukon, Cadillac Hummer & More Models Replace 12601822 213-3521 89060413Photo 3 of Dual Knock Sensor Kit with Wiring Harness & Intake Manifold Gasket,for Chevy Silverado Avalanche Tahoe, GMC Sierra Yukon, Cadillac Hummer & More Models Replace 12601822 213-3521 89060413