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How to Replace Engine Knock Sensor 00-06 Chevy Suburban SUV

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How to Replace Engine Knock Sensor 00-06 Chevy Suburban SUV

Created on: 2014-06-17

Learn how to stop that pinging noise in your engine. The experts at 1A Auto show how to replace the engine knock sensor in your 00-06 Chevy Silverado, Suburban or Tahoe; or GMC Sierra or Yukon.

  1. step 1 :Removing the Air Intake Hose
    • 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 2 :Disconnecting the Intake Manifold
    • 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 3 :Disconnecting the Fuel Line
    • 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 4 :Removing the Intake Manifold
    • 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 5 :Removing the Engine Knock Sensors
    • 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 6 :Installing the Engine Knock Sensors
    • 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 7 :Reinstalling the Intake Manifold
    • 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 8 :Reconnecting the Fuel Line
    • 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 9 :Reconnecting the Intake Manifold
    • 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 10 :Reinstalling the Air Intake Hose
    • 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

    Socket Extensions

    Torque Wrench

    Ratchet

  • Screwdrivers & Related

    Flat Blade Screwdriver

  • Sockets - Metric

    8mm Socket

    10mm Socket

    22mm Socket

  • Specialty Tools

    Fuel Line Disconnect Tool

Installation Video
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Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.

Hi, I'm Don from 1AAuto. I hope this how-to-video helps you out, and the next time you need a part for your vehicle, think of 1AAuto.com. Thanks.

In this video, we're going to show you how to replace a knock sensor on this 2002 Chevy Suburban with the 5.3 Liter engine, and it's the same part and similar process on these Suburbans from 2000 to 2005. The items you'll need are a new knock sensor from 1AAuto.com, a flat blade screwdriver, an 8, 10, and 22mm socket and ratchet with an extension, a fuel line disconnect tool (in this case a 3/8 inch), pliers, a vacuum, penetrating fluid, and a torque wrench.

Start off by removing the 8mm bolt that holds on your engine cover. That pulls free. Then, using a flat blade screwdriver, just loosen up this hose clamp right here and this hose clamp right over here. Now, you can pull the hose free. Pull it free from this side, then just lift it up and pry out the hose from the intake hose. Then it's free. Now, remove these three 8mm bolts right here. We'll fast forward as Don does this. Then remove these three 8mm bolts right here.

Next, disconnect these two harnesses. To do that, you just pull up on the tab and pull them free. Then pry this hose right here free, and then remove these three 10mm nuts. Lift up this bracket and pull it aside, and then remove this 8mm bolt right here, and then just pull that bracket aside, and then disconnect this hose clamp, and do the same thing back here with this one. You want to make sure you disconnect that harness as well and pull that aside. Do the same thing back here, until this set of harnesses loosens up. Then just remove this 10mm nut right here, and then you can just pull that set of harnesses aside. Then pull up the clip on the harness for your fuel injector, then push the tab on the harness and disconnect it, and repeat the process for the other seven.

Now, just loosen up this fuel line cap, and using a flat blade screwdriver and a rag, you want to just put the rag over it and push the tab on the fuel bleeder. It should spray out just a little bit, and it'll release the pressure. Then replace the cap and come over here and just pry off this clip. Then, using a fuel line separator tool, you just want to push that all the way in. For this one, it's a 3/8 inch. Then, once that's pushed all the way in, you can pull the fuel line free, and then it just pulls off. You put it on the fuel line below it and repeat the same process. Take a pair of pliers and push the teeth together on this hose clamp. Slide it down the hose, and then pull the hose free. Then just remove this series of 10mm bolts along each side of your intake manifold. You can kind of see them, they're down below the fuel rail there. We'll just fast forward as Don removes these.

Lift your intake manifold up and out. You will have to maneuver a lot of harnesses and wires and everything but you just want to get this out as far as you can get it to go, which at this point should be right about here. Once you get to this point, take your EGR and just feed it through the harnesses and out. Once you feed it through, you can just lift your intake manifold up and out. Pry up on your knock sensor harness caps. Then, using a pair of needle nose pliers, preferably bent ones, you want to push in the sides of the harness and then pull up. Do the same thing to this side and then your harness. Underneath that harness your knock sensors are located right here. Using a 22mm socket, just remove the knock sensor you want to replace. On the left is the old knock sensor; on the right is the new one from 1AAuto. You can see they are identical and they will fit exactly the same.

Feed your new knock sensor down into place. Just tighten it up, and we'll fast forward as Don does that. Push the harness back down onto the knock sensor and then replace the cap. Then replace the other end of the harness and that cap as well. Set your intake manifold back down into place, then just feed this hose down and pull it out through the other side. Now, disconnect your EGR by just pulling out on the clip with a flat blade screwdriver and just pulling the hose free. Then feed that hose through the side of your intake manifold. Just maneuver it down and into place. We're going to fast forward as Don continues to do this. You just have to move the cables and wires around until you can finally get it to set down, it does take a second but it will go down. Now reconnect this hose. Just using pliers, slide that hose clamp back into place, and then reconnect this bracket. You want to just line this up and push it back onto those studs. Then just replace those nuts. Take the EGR valve and push it back down into place, and replace the bolt that holds it there, and then reconnect that hose. Reconnect your other hose to the top of your intake manifold, replace this bracket and replace the bolts that hold it into place, reconnect this hose over here, and then replace this bracket and the bolts that hold it into place and just tighten those up. Then just replace each of these long 10mm bolts that line the side of your intake manifold, and then just tighten each of those up. You can see that we use a variety of different extensions just to help get there. You can use a longer one for these ones, then, as you get further back, you may need to use a shorter one. It does help to have a flashlight, too. Just make sure you reconnect your fuel lines, and then put those clips back into place to lock them.

Okay, you want to torque the manifold bolts. Start in the middle and go across, then work your way around the manifold in a counter-clockwise pattern. You want to tighten them on the first pass to 44 inch pounds, then 89 inch pounds. Now, just reconnect each of your fuel injectors. You just want to push the harness in and replace that clip and push it down into place. We'll fast forward as Don does this to the other fuel injectors. Lower the intake hose back down into place. You just push it back and then tighten up those two hose clamps. Double check that all your harnesses are connected and all the hoses are connected, and then replace your engine cover. Once you get it lined up, just replace that bolt and tighten it up. Then you're all set.

We hope this video helps you out. Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet. Please feel free to call us toll-free, 888-844-3393. We're the company that's here for you on the Internet and in person.

Tools needed for replacement:

    Materials, Fluids, and Supplies

  • Rust Penetrant

  • Pliers, Cutters & misc Wrenches

  • Bent Nose Pliers

  • Ratchets & Related

  • Socket Extensions
  • Torque Wrench
  • Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

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

  • Specialty Tools

  • Fuel Line Disconnect Tool

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1999 - 2003  GMC  Sierra 1500
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2001 - 2003  Chevrolet  Silverado 3500
2003 - 2003  Chevrolet  Silverado 1500
2002 - 2003  Cadillac  Escalade EXT
2003 - 2003  Chevrolet  Express 1500 Van
1999 - 2003  Chevrolet  Silverado 1500
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2003 - 2003  Isuzu  Ascender
2000 - 2003  GMC  Yukon
2003 - 2003  GMC  Envoy XL
1999 - 2000  Chevrolet  Silverado 2500
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1999 - 2000  Chevrolet  Silverado 1500
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2001 - 2004  Chevrolet  Corvette
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2000 - 2005  GMC  Yukon XL 1500
2001 - 2004  GMC  Sierra 2500 HD
2000 - 2005  GMC  Yukon XL 2500
2002 - 2006  GMC  Yukon XL 1500
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2002 - 2006  Chevrolet  Suburban 1500
2001 - 2006  Chevrolet  Silverado 2500 HD
2001 - 2004  Chevrolet  Silverado 2500 HD
2006 - 2006  Chevrolet  Suburban 1500
2000 - 2005  Chevrolet  Suburban 1500
2001 - 2006  GMC  Sierra 2500 HD
2001 - 2004  GMC  Sierra 2500
2001 - 2006  Chevrolet  Silverado 3500
1999 - 2006  GMC  Sierra 1500
2001 - 2006  GMC  Sierra 3500
1999 - 2004  Chevrolet  Silverado 2500
2006 - 2006  GMC  Sierra 1500
2005 - 2005  GMC  Sierra 1500
2000 - 2006  GMC  Yukon
2002 - 2006  GMC  Yukon
2003 - 2004  Chevrolet  Trailblazer EXT
2005 - 2005  Chevrolet  Silverado 1500
1999 - 2007  Chevrolet  Silverado 1500
2002 - 2007  Chevrolet  Silverado 1500
2003 - 2007  GMC  Savana 2500 Van
2003 - 2005  GMC  Savana 2500 Van
2003 - 2007  GMC  Savana 3500 Van
2005 - 2007  Chevrolet  Express 3500 Van
2003 - 2007  Chevrolet  Express 3500 Van
2007 - 2007  GMC  Savana 1500 Van
2003 - 2007  GMC  Savana 1500 Van
2002 - 2006  Cadillac  Escalade EXT
2003 - 2006  Cadillac  Escalade ESV
2007 - 2007  Chevrolet  Express 1500 Van
2003 - 2007  Chevrolet  Express 1500 Van
1999 - 2004  GMC  Sierra 2500
2001 - 2006  GMC  Sierra 1500
2003 - 2007  Chevrolet  Express 2500 Van
2003 - 2005  Chevrolet  Express 2500 Van
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2004 - 2009  Cadillac  Escalade ESV
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2004 - 2015  Chevrolet  Express 2500 Van
2009 - 2013  Chevrolet  Silverado 1500
2003 - 2013  Chevrolet  Silverado 1500
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2006 - 2009  Chevrolet  Trailblazer
2002 - 2014  Chevrolet  Suburban 1500
2002 - 2014  Chevrolet  Tahoe
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2004 - 2006  GMC  Envoy XL
2004 - 2006  Chevrolet  Trailblazer EXT
2004 - 2005  GMC  Savana 2500 Van
2004 - 2014  GMC  Savana 1500 Van
2004 - 2015  GMC  Savana 2500 Van
2003 - 2013  GMC  Sierra 1500
2004 - 2013  GMC  Sierra 1500
2002 - 2013  GMC  Sierra 1500
2004 - 2015  GMC  Savana 3500 Van
2004 - 2009  GMC  Yukon
2004 - 2014  GMC  Yukon
2002 - 2014  GMC  Yukon
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2001 - 2001  GMC  Sierra 1500
2000 - 2006  Chevrolet  Suburban 1500
2002 - 2006  Chevrolet  Avalanche 1500
2005 - 2006  GMC  Sierra 2500 HD
2001 - 2006  GMC  Yukon XL 1500
2000 - 2006  GMC  Yukon XL 2500
2000 - 2006  GMC  Yukon XL 1500
2001 - 2006  GMC  Yukon
2000 - 2000  GMC  Yukon XL 1500
2000 - 2000  GMC  Yukon XL 2500
2003 - 2006  GMC  Yukon XL 2500
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