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:

  • Comes as a SET of 3
    • (1) - Knock Sensor Harness
    • (2) - Knock Sensors
  • Replaces dealer part numbers: 10456603, 12589867, 12601822, 8104566030
  • Includes Grommets
  • Built to strict quality control standards
  • 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.

Returns Note:

Our electrical and electronic parts are subject to strict quality control testing.  Once the item has been installed or plugged in, it is no longer eligible for a refund.  The item may be eligible for replacement, only if it is found to have a manufacturing defect. Before purchasing, please ensure proper diagnosis of the failed original part is performed.

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

4.1 / 5.0
35 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
24
4
0
0
7
Fast shipping. Good quality parts. My favorite site for parts.
August 6, 2018
Purchased
1 month ago
Engine knock sensor kit and free install video
This is a five star kit from 1aauto and would recommend it to anyone but it was the video installation instructions from 1aauto that made me buy this kit. The video was easy to understand and covered everything I needed to know for a successful install. And best of all increased gas mileage and no more check engine light.
August 1, 2018
Purchased
1 month ago
Don’t waste your money
My car was throwing a code for one of my knock sensors. Decided to purchase from this website as it was a good price for the knock sensors themselves and the harness. That was a huge mistake. Upon having them replaced by a professional mechanic, the car started throwing codes for both sensors. I then went to a local auto parts store where I had to spend more money. However, as expected, those fixed the problem. I tried to see if I could get my money back or at least get new ones not that I needed them anyway and received the response about how products that have been used are not subject to refund because of their “quality control” however how am i supposed to know something doesn’t work if it is not installed? The representative tried to tell me they can’t send me new ones because I didn’t call to have them replaced. I did not have time to wait around to receive new ones. I told her this but this company just didn’t care. I probably wouldn’t have minded as much if they were courteous about it. This is not a webiste that cares about satisfaction to their customers. Do not buy these if you need knock sensors. You’re better off spending a couple more bucks.
July 31, 2018
Purchased
1 month ago
Response from 1A Auto
Hello, It appears a representative has reached out to you in regards to having a return made for the items.
July 31, 2018
Emma F
Great products
Installed it with no problems. fast shipping.. recommend 100% Great products. Fast shipping.
June 21, 2018
Purchased
2 months ago
Great product, fast shipping, fixed problem and was cheap.
Everything went well with this part I have no complaints I do recommend you are TV the boot back on top of the block just to keep water from getting back down there and rusting it out
May 28, 2018
Purchased
1 year ago
Great service
First time customer i really liked the srrvice and shipping time. Definstely going to go to 1a auto next time i need a car part.
May 8, 2018
Purchased
4 months ago
Fast and friendly
In the last year I have purchased many different parts from 1aauto for my truck and wifes SUV. The parts showed up fast, they were correct and most importantly they were much cheaper than the competition. The online videos are extremely helpful for the do it yourselfers. My new favorite place to order parts from is definitely 1aauto.com
April 25, 2018
Purchased
5 months ago
Perfect fit
Quality parts at a reasonable price. The ordering and checkout process was quick and easy.
April 9, 2018
Purchased
5 months ago
Bad sensor
Out of the box bad sensor.............................................
April 8, 2018
Purchased
7 months ago
Not worth it
very cheap quality not worth it get oem now I have to remove intake again to take these cheap things out throwing codes left and right
April 8, 2018
Purchased
5 months ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 6 questions Browse 6 questions and 34 answers
Are these OEM AC Delco parts? I don't want to tear the top half of my block off and fit these to only replace them again shortly after
Richard B on Feb 2, 2016
BEST ANSWER: I am assuming you are using these parts in a GM vehicle. If it does not say "AC DELCO", do not assume they are OEM AC Delco parts. 1AAUTO sells AC DELCO knock sensors. To avoid tearing the top half of the engine twice, use only OEM AC DELCO knock sensors. While replacing the knock sensors, also replace the knock sensor wiring harness. If you are planning to clean the engine bay, clean before replacing the knock sensors. Water and knock sensors do not mix very well!
How long would an average mechanic take do this job?
Larry H on Jan 28, 2016
BEST ANSWER: I'd imagine a seasoned mechanic could do this job in 4 hours. Cleaning the intake manifold and other ares around the knock sensors could take some time if done thoroughly. Most won't take the time as their task is to complete the job under the time suggested by the Chilton manual they use to determine the jobs labor rate and still get paid for a 4 hour job.
Any conscious backyard wrench twister should be able to get it done in 6 hours.
Hope this helps.
What is limitied warranty?
Amy T on Mar 24, 2017
BEST ANSWER: The limited lifetime warranty covers our part for as long as you own the vehicle. If the vehicle is sold then the warranty would become void. If you experience any issues with the parts, we ask that you contact us with a brief description of the issue so we may document our system. A replacement will be issued, and the faulty part(s) will need to be shipped back once the new parts are installed.
Should I replace the intake gasket when replacing knock sensors?
Everett on Jun 17, 2016
BEST ANSWER: I didn't. The intake manifold is low pressure and the 16 year old gasket was still very pliable. I don't see the point. If your gasket has visible flaws when you pull it out, I would replace it.
Does the kit come with two knock senors?
Jaypaul S on Oct 31, 2017
BEST ANSWER: Yes the kit does include 2 knock sensors and 1 harness. I suggest you purchase AC Delco knock sensors and a genuine GM harness.
I purchased this kit from 1A Auto. The harness end terminals weren't crimped properly(fell off the wires) and the knock sensors had to be replaced due to throwing codes the same day as installation. Ended up doing the job twice. Second time with OE parts with no issues after two years.
what brand are the knock sensors?
Javier M on Feb 6, 2016
BEST ANSWER: they are "1a auto" brand. they look identical to ac delco but they dont have any markings on them. FYI do NOT over torque them it will ruin them...

Vehicle Fit

Year Make Model Description
2004-2005Cadillac CTS-V Cadillac CTS-V Engine Knock Sensor & Harness Kit
2002-2006Cadillac Escalade Cadillac Escalade Engine Knock Sensor & Harness Kit
2003-2006Cadillac Escalade ESV Cadillac Escalade ESV Engine Knock Sensor & Harness Kit
2002-2006Cadillac Escalade EXT Cadillac Escalade EXT Engine Knock Sensor & Harness Kit
2002-2006Chevy Avalanche 1500 Chevy Avalanche 1500 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
2003-2007Chevy Express 1500 Van Chevy Express 1500 Van Engine Knock Sensor & Harness Kit V8 5.3L
2003-2005Chevy Express 2500 Van Chevy Express 2500 Van Engine Knock Sensor & Harness Kit V8 4.8L
2003-2005Chevy Express 2500 Van Chevy Express 2500 Van Engine Knock Sensor & Harness Kit V8 5.3L
2003-2007Chevy Express 2500 Van Chevy Express 2500 Van Engine Knock Sensor & Harness Kit V8 6.0L
2003-2007Chevy Express 3500 Van Chevy Express 3500 Van Engine Knock Sensor & Harness Kit
1999-2006Chevy Silverado 1500 Chevy Silverado 1500 Engine Knock Sensor & Harness Kit V8 4.8L
1999-2006Chevy Silverado 1500 Chevy Silverado 1500 Engine Knock Sensor & Harness Kit V8 5.3L
2001-2006Chevy Silverado 1500 Chevy Silverado 1500 Engine Knock Sensor & Harness Kit V8 6.0L
2007Chevy Silverado 1500 Classic Chevy Silverado 1500 Classic Engine Knock Sensor & Harness Kit V8 4.8L
2007Chevy Silverado 1500 Classic Chevy Silverado 1500 Classic Engine Knock Sensor & Harness Kit V8 5.3L
2007Chevy Silverado 1500 Classic Chevy Silverado 1500 Classic Engine Knock Sensor & Harness Kit V8 6.0L
2001-2003Chevy Silverado 1500 HD Chevy Silverado 1500 HD Engine Knock Sensor & Harness Kit V8 6.0L
2005-2006Chevy Silverado 1500 HD Chevy Silverado 1500 HD Engine Knock Sensor & Harness Kit
2007Chevy Silverado 1500 HD Classic Chevy Silverado 1500 HD Classic Engine Knock Sensor & Harness Kit
1999-2004Chevy Silverado 2500 Chevy Silverado 2500 Engine Knock Sensor & Harness Kit V8 5.3L
1999-2004Chevy Silverado 2500 Chevy Silverado 2500 Engine Knock Sensor & Harness Kit V8 6.0L
2001-2006Chevy Silverado 2500 HD Chevy Silverado 2500 HD Engine Knock Sensor & Harness Kit V8 6.0L
2007Chevy Silverado 2500 HD Classic Chevy Silverado 2500 HD Classic Engine Knock Sensor & Harness Kit V8 6.0L
2001-2006Chevy Silverado 3500 Chevy Silverado 3500 Engine Knock Sensor & Harness Kit V8 6.0L
2007Chevy Silverado 3500 Classic Chevy Silverado 3500 Classic Engine Knock Sensor & Harness Kit V8 6.0L
2000-2006Chevy Suburban 1500 Chevy Suburban 1500 Engine Knock Sensor & Harness Kit
2000-2006Chevy Suburban 2500 Chevy Suburban 2500 Engine Knock Sensor & Harness Kit V8 6.0L
2000-2006Chevy Tahoe Chevy Tahoe Engine Knock Sensor & Harness Kit V8 4.8L
2000-2006Chevy Tahoe Chevy Tahoe Engine Knock Sensor & Harness Kit V8 5.3L
2003-2004GMC Envoy XL GMC Envoy XL Engine Knock Sensor & Harness Kit V8 5.3L
2003-2007GMC Savana 1500 Van GMC Savana 1500 Van Engine Knock Sensor & Harness Kit V8 5.3L
2003-2007GMC Savana 2500 Van GMC Savana 2500 Van Engine Knock Sensor & Harness Kit V8 6.0L
2003-2007GMC Savana 2500 Van GMC Savana 2500 Van Engine Knock Sensor & Harness Kit V8 5.3L
2003-2007GMC Savana 2500 Van GMC Savana 2500 Van Engine Knock Sensor & Harness Kit V8 4.8L
2003-2007GMC Savana 3500 Van GMC Savana 3500 Van Engine Knock Sensor & Harness Kit
1999-2006GMC Sierra 1500 GMC Sierra 1500 Engine Knock Sensor & Harness Kit V8 4.8L
1999-2006GMC Sierra 1500 GMC Sierra 1500 Engine Knock Sensor & Harness Kit V8 5.3L
2001-2006GMC Sierra 1500 GMC Sierra 1500 Engine Knock Sensor & Harness Kit V8 6.0L
2007GMC Sierra 1500 Classic GMC Sierra 1500 Classic Engine Knock Sensor & Harness Kit V8 6.0L
2007GMC Sierra 1500 Classic GMC Sierra 1500 Classic Engine Knock Sensor & Harness Kit V8 5.3L
2007GMC Sierra 1500 Classic GMC Sierra 1500 Classic Engine Knock Sensor & Harness Kit V8 4.8L
2001-2003GMC Sierra 1500 HD GMC Sierra 1500 HD Engine Knock Sensor & Harness Kit V8 6.0L
2005-2006GMC Sierra 1500 HD GMC Sierra 1500 HD Engine Knock Sensor & Harness Kit
2007GMC Sierra 1500 HD Classic GMC Sierra 1500 HD Classic 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
2001-2006GMC Sierra 2500 HD GMC Sierra 2500 HD Engine Knock Sensor & Harness Kit V8 6.0L
2007GMC Sierra 2500 HD Classic GMC Sierra 2500 HD Classic Engine Knock Sensor & Harness Kit V8 6.0L (8th Vin Digit U)
2001-2004GMC Sierra 3500 GMC Sierra 3500 Engine Knock Sensor & Harness Kit V8 6.0L
2005-2006GMC Sierra 3500 GMC Sierra 3500 Engine Knock Sensor & Harness Kit V8 6.0L (8th Vin Digit U)
2007GMC Sierra 3500 Classic GMC Sierra 3500 Classic Engine Knock Sensor & Harness Kit V8 6.0L (8th Vin Digit U)
2000-2003GMC Yukon GMC Yukon Engine Knock Sensor & Harness Kit V8 4.8L
2000-2006GMC Yukon GMC Yukon Engine Knock Sensor & Harness Kit V8 5.3L
2001-2006GMC Yukon GMC Yukon Denali Engine Knock Sensor & Harness Kit with 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
2005-2007Hummer 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

This part replaces:

  • Wells 1437
  • OE # 10456603
  • OE # 12575869
  • OE # 12589867
  • OE # 12597415
  • OE # 12601822
  • OE # 8104566030
  • Standard Motor Products KS116
  • Dorman 917-033
Part #: 1AEEK00589


Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

How-to Video:

(15:52 min)