Description
Warranty & Shipping
How-To & Tools
Product Reviews
Q&A
Vehicle Fit

A knock sensor is like a small electronic microphone that is usually attached to the engine block and listens for a couple of things that a engine might do. One thing it listens for is pre-ignition or knocking inside the engine usually caused by a few issues including dirty gas, wrong engine timing low octane fuel, wrong air / fuel mixture, and also by the wrong spark plugs. It also listens for engine run on which happens when the vehicle is turned off, but tries to keep running until it stalls. Once a noise is detected, the knock sensor sends a signal to the cars computer which in turn will retard the timing at 2 degree intervals until it corrects the issue. If the knock sensor fails, it can seriously damage the engine, as continuous pre-ignition could cause melting or fractures in the pistons just to name a few.

Specifications:

  • Brand New Wells Knock Sensor with Dual Connector Harness
  • Replaces dealer part numbers: 10456603, 12589867, 12601822, 8104566030
  • Includes Grommets
  • Built to strict quality control standards
  • Sensor Mounting Type: Screw-In
  • Sensor Number of Terminals: (1)
  • Direct replacement
  • Built to strict quality control standards

This engine knock sensor & harness kit makes a great replacement and has good cost savings over a dealer unit.

Our electrical and electronic parts are subject to strict quality control testing. Please ensure proper diagnosis of this item before purchasing as the item cannot be returned once installed or plugged in.

Item Condition: New

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Removing the Air Intake Hose (0:48)
    • Remove the 8mm bolt holding the engine cover
    • Loosen the air intake hose clamps with a flat blade screwdriver
    • Unclip the intake hose from the radiator hose
    • Pull the intake hose up and out
  2. step : Disconnecting the Intake Manifold (1:30)
    • Remove the 8mm bolts
    • Disconnect the harnesses by pulling up on the tab
    • Pry the vacuum hose free
    • Remove the 10mm nuts from the throttle body
    • Lift up the bracket and pull it aside
    • Remove the 8mm bolt and the pull the bracket aside
    • Disconnect the two hose plants and harnesses
    • Remove the 10mm nut and pull the set of harnesses aside
  3. step : Disconnecting the Fuel Line (3:47)
    • Disconnect the eight harnesses to the fuel injector by pulling up on the tab
    • Loosen the fuel line cap
    • Covering the fuel line with a rag, push the tab on the fuel bleeder with a flat head screwdriver
    • Replace the cap
    • Remove the clip
    • Push the fuel line separator tool all the way in and pull the fuel line free
    • Clamp the vacuum hose clamp with pliers and pull it free
  4. step : Removing the Intake Manifold (5:26)
    • Remove the series of 10mm bolts
    • Maneuver the intake manifold past harnesses and wires and move it as far as possible
    • Feed the EGR out through the harnesses
    • Lift the intake manifold up and out
  5. step : Removing the Engine Knock Sensors (7:24)
    • Pry up the knock sensor harness caps
    • Push in the sides of the harness with bent needle nose pliers and pull up
    • Remove the knock sensors with a 22mm socket
  6. step : Installing the Engine Knock Sensors (8:03)
    • Feed the knock sensor into place and tighten it with a 22mm socket
    • Push the harness back onto the knock sensor
    • Replace the cap
  7. step : Reinstalling the Intake Manifold (9:06)
    • Set the intake manifold down and pull the vacuum hose out through the other side
    • Disconnect the EGR by pulling out on the clip with a flat blade screw driver
    • Feed the hose through the side of the intake manifold
    • Maneuver the intake manifold down and into place
  8. step : Reconnecting the Fuel Line (10:14)
    • Reconnect the fuel lines
    • Replace the clips to lock the lines
    • Slide the hose clamp back into place using pliers
    • Line up the throttle body and reconnect it by pushing it up on the studs
    • Push the EGR valve back into place, replace the bolt, and reconnect the hose
    • Reconnect the vacuum hose into the throttle body
  9. step : Reconnecting the Intake Manifold (12:24)
    • Replace the 10mm bolts
    • Replace the bracket near the back
    • Torque the manifold bolts with a torque wrench
    • Start in the middle and work in a counter-clockwise pattern
    • Tighten them on the first pass to 44 inch pounds, then 89 inch pounds
    • Push the harness in and push the clip into place to reconnect the fuel injectors
  10. step : Reinstalling the Air Intake Hose (14:54)
    • Push the intake hose into place
    • Tighten the intake hose clamps with a flat blade screwdriver
    • Double check all the harnesses and hoses
    • Replace the engine cover with an 8mm bolt

Tools needed for replacement:

    Materials, Fluids, and Supplies

  • Rust Penetrant

  • Pliers, Cutters & misc Wrenches

  • Bent Nose Pliers

  • Ratchets & Related

  • Ratchet
  • Socket Extensions
  • Torque Wrench

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 10mm Socket
  • 22mm Socket
  • 8mm Socket

  • Specialty Tools

  • Fuel Line Disconnect Tool

5.00/ 5.0
1review
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
1
0
0
0
0
Knock sensor on 2001 5.3 Silverado
So far I am very satisfied. Its only been a week since installment and no problems. So far so good!
September 27, 2017
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
No questions have been asked about this item.
Year Make Model Description
2002-2004Cadillac Escalade Cadillac Escalade Engine Knock Sensor & Harness Kit
2003Cadillac Escalade ESV Cadillac Escalade ESV Engine Knock Sensor & Harness Kit
2002-2003Cadillac Escalade EXT Cadillac Escalade EXT Engine Knock Sensor & Harness Kit
1999-2002Chevy Camaro Chevy Camaro Engine Knock Sensor & Harness Kit V8 5.7L
1999-2003Chevy Corvette Chevy Corvette Engine Knock Sensor & Harness Kit
2003-2005Chevy Express 1500 Van Chevy Express 1500 Van Engine Knock Sensor & Harness Kit V8 5.3L
2003-2004Chevy Express 2500 Van Chevy Express 2500 Van Engine Knock Sensor & Harness Kit V8 5.3L
2003-2004Chevy Express 2500 Van Chevy Express 2500 Van Engine Knock Sensor & Harness Kit V8 6.0L
2003-2005Chevy Express 2500 Van Chevy Express 2500 Van Engine Knock Sensor & Harness Kit V8 4.8L
2003-2005Chevy Express 3500 Van Chevy Express 3500 Van Engine Knock Sensor & Harness Kit
2001-2005Chevy Silverado 1500 Chevy Silverado 1500 Engine Knock Sensor & Harness Kit V8 4.8L
2001-2005Chevy Silverado 1500 Chevy Silverado 1500 Engine Knock Sensor & Harness Kit V8 6.0L
2001-2005Chevy Silverado 1500 Chevy Silverado 1500 Engine Knock Sensor & Harness Kit V8 5.3L
2001-2003Chevy Silverado 1500 HD Chevy Silverado 1500 HD Engine Knock Sensor & Harness Kit V8 6.0L
2005Chevy Silverado 1500 HD Chevy Silverado 1500 HD Engine Knock Sensor & Harness Kit
2001-2004Chevy Silverado 2500 Chevy Silverado 2500 Engine Knock Sensor & Harness Kit V8 6.0L
2001-2005Chevy Silverado 2500 HD Chevy Silverado 2500 HD Engine Knock Sensor & Harness Kit V8 6.0L
2001-2005Chevy Silverado 3500 Chevy Silverado 3500 Engine Knock Sensor & Harness Kit V8 6.0L
2000-2005Chevy Suburban 1500 Chevy Suburban 1500 Engine Knock Sensor & Harness Kit V8 5.3L
2000-2005Chevy Suburban 2500 Chevy Suburban 2500 Engine Knock Sensor & Harness Kit V8 6.0L
2001-2004Chevy Tahoe Chevy Tahoe Engine Knock Sensor & Harness Kit V8 4.8L
2003-2005GMC Savana 1500 Van GMC Savana 1500 Van Engine Knock Sensor & Harness Kit V8 5.3L
2003-2005GMC Savana 2500 Van GMC Savana 2500 Van Engine Knock Sensor & Harness Kit V8 4.8L
2003-2005GMC Savana 2500 Van GMC Savana 2500 Van Engine Knock Sensor & Harness Kit V8 5.3L
2003-2005GMC Savana 2500 Van GMC Savana 2500 Van Engine Knock Sensor & Harness Kit V8 6.0L
2003-2005GMC Savana 3500 Van GMC Savana 3500 Van Engine Knock Sensor & Harness Kit
1999-2005GMC Sierra 1500 GMC Sierra 1500 Engine Knock Sensor & Harness Kit V8 5.3L
1999-2005GMC Sierra 1500 GMC Sierra 1500 Engine Knock Sensor & Harness Kit V8 4.8L
2001-2005GMC Sierra 1500 GMC Sierra 1500 Engine Knock Sensor & Harness Kit V8 6.0L
2001-2003GMC Sierra 1500 HD GMC Sierra 1500 HD Engine Knock Sensor & Harness Kit V8 6.0L
2005GMC Sierra 1500 HD GMC Sierra 1500 HD Engine Knock Sensor & Harness Kit
1999-2000GMC Sierra 2500 GMC Sierra 2500 Engine Knock Sensor & Harness Kit
2001-2004GMC Sierra 2500 GMC Sierra 2500 Engine Knock Sensor & Harness Kit V8 6.0L
2001-2005GMC Sierra 2500 HD GMC Sierra 2500 HD Engine Knock Sensor & Harness Kit V8 6.0L
2001-2004GMC Sierra 3500 GMC Sierra 3500 Engine Knock Sensor & Harness Kit V8 6.0L
2005GMC Sierra 3500 GMC Sierra 3500 Engine Knock Sensor & Harness Kit V8 6.0L (8th Vin Digit U)
2000-2006GMC Yukon GMC Yukon Engine Knock Sensor & Harness Kit V8 5.3L
2000-2003GMC Yukon GMC Yukon Engine Knock Sensor & Harness Kit V8 4.8L
2001-2006GMC Yukon GMC Yukon Denali Engine Knock Sensor & Harness Kit V8 6.0L
2006GMC Yukon XL 1500 GMC Yukon XL 1500 Engine Knock Sensor & Harness Kit V8 5.3L
2003-2006GMC Yukon XL 2500 GMC Yukon XL 2500 Engine Knock Sensor & Harness Kit V8 6.0L
2005-2006Hummer H2 Hummer H2 Engine Knock Sensor & Harness Kit
1999-2002Pontiac Firebird Pontiac Firebird Engine Knock Sensor & Harness Kit V8 5.7L
2004Pontiac GTO Pontiac GTO Engine Knock Sensor & Harness Kit
Part #: 1AEEK00327

Out of Stock

How-to Video:

(15:52 min)