Replaces

2005-2006 Chevy Avalanche 1500 Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit Z)

Part Details

  • Brands: AC Delco

This part replaces:

  • ACDelco 213-3521
  • OE # 12589867

  • New

AC DELCO 213-3521 [KNOCK (DETONATION) SENSOR]

This AC DELCO knock or detonation sensor is a new part. It is the same piece that you would receive if you purchased it from your local GM dealer.

A knock sensor is like a very small electric microphone that is placed on the engine. It listens for pre ignition knocks and then sends a signal to the ECM. The ECM then will make adjustments to the engines timing. If the knock sensor fails, it possibly can cause serious engine damage as continuous pre ignition can cause a fracture in the pistons!

This knock sensor features the following specifications:

  • Brand New AC Delco part
  • Replaces dealer part number: 12589867, 213-3521
  • Built to strict quality control standards
  • Direct replacement
  • 100% factory tested
  • Mounts in either the engine block, cylinder head, or intake manifold
  • (1) Wire Style

These are electrical parts and are all tested before they leave our manufacturer. This electrical item is not returnable; it is only eligible for exchange

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. Please keep your invoice for proof of this warranty.

  1. Removing the Air Intake Hose (0:48 in the video)
    • 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. Disconnecting the Intake Manifold (1:30 in the video)
    • 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. Disconnecting the Fuel Line (3:47 in the video)
    • 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. Removing the Intake Manifold (5:26 in the video)
    • 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. Removing the Engine Knock Sensors (7:24 in the video)
    • 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. Installing the Engine Knock Sensors (8:03 in the video)
    • 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. Reinstalling the Intake Manifold (9:06 in the video)
    • 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. Reconnecting the Fuel Line (10:14 in the video)
    • 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. Reconnecting the Intake Manifold (12:24 in the video)
    • 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. Reinstalling the Air Intake Hose (14:54 in the video)
    • 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

How-to Video:

(15:52 min)

Tools List:

    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



This part replaces:

  • ACDelco 213-3521
  • OE # 12589867

Vehicle Fit

  • 2004 Buick Rainier Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit P)
  • 2004-2005 Cadillac CTS-V Engine Knock Sensor (AC Delco) for V8 5.7L (8th Vin Digit S)
  • 2002-2005 Cadillac Escalade Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit T)
  • 2002-2006 Cadillac Escalade Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit N)
  • 2003-2006 Cadillac Escalade ESV Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit N)
  • 2002-2006 Cadillac Escalade EXT Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit N)
  • 2002-2004 Chevy Avalanche 1500 Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit T)
  • 2005-2006 Chevy Avalanche 1500 Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit Z)
  • 1998-2002 Chevy Camaro Engine Knock Sensor (AC Delco) for V8 5.7L (8th Vin Digit G)
  • 1998-2004 Chevy Corvette Engine Knock Sensor (AC Delco) for V8 5.7L (8th Vin Digit G)
  • 2001-2004 Chevy Corvette Engine Knock Sensor (AC Delco) for V8 5.7L (8th Vin Digit S)
  • 2003-2007 Chevy Express 1500 Van Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit T)
  • 2007 Chevy Express 1500 Van Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit Z)
  • 2003-2007 Chevy Express 2500 Van Engine Knock Sensor (AC Delco) for V8 4.8L (8th Vin Digit V)
  • 2003-2007 Chevy Express 2500 Van Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2003-2005 Chevy Express 2500 Van Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit T)
  • 2003-2007 Chevy Express 3500 Van Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2005-2007 Chevy Express 3500 Van Engine Knock Sensor (AC Delco) for V8 4.8L (8th Vin Digit V)
  • 2003-2004 Chevy SSR Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit P)
  • 1999-2007 Chevy Silverado 1500 Engine Knock Sensor (AC Delco) for V8 4.8L (8th Vin Digit V)
  • 1999-2007 Chevy Silverado 1500 Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit T)
  • 2002-2007 Chevy Silverado 1500 Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit Z)
  • 2003-2007 Chevy Silverado 1500 Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit N)
  • 2005 Chevy Silverado 1500 Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit B)
  • 2001-2003 Chevy Silverado 1500 HD Engine Knock Sensor (AC Delco) for V8 6.0L
  • 2005-2007 Chevy Silverado 1500 HD Engine Knock Sensor (AC Delco) for V8 6.0L
  • 1999-2004 Chevy Silverado 2500 Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 1999-2000 Chevy Silverado 2500 Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit T)
  • 2001-2004 Chevy Silverado 2500 HD Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2001-2007 Chevy Silverado 2500 HD Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2001-2007 Chevy Silverado 3500 Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2000-2005 Chevy Suburban 1500 Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit T)
  • 2002-2006 Chevy Suburban 1500 Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit Z)
  • 2006 Chevy Suburban 1500 Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2000-2006 Chevy Suburban 2500 Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2000-2006 Chevy Tahoe Engine Knock Sensor (AC Delco) for V8 4.8L (8th Vin Digit V)
  • 2000-2006 Chevy Tahoe Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit T)
  • 2002-2006 Chevy Tahoe Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit Z)
  • 2003-2004 Chevy Trailblazer EXT Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit P)
  • 2003-2004 GMC Envoy XL Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit P)
  • 2003-2007 GMC Savana 1500 Van Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit T)
  • 2007 GMC Savana 1500 Van Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit Z)
  • 2003-2007 GMC Savana 2500 Van Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2003-2007 GMC Savana 2500 Van Engine Knock Sensor (AC Delco) for V8 4.8L (8th Vin Digit V)
  • 2003-2005 GMC Savana 2500 Van Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit T)
  • 2003-2007 GMC Savana 3500 Van Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2004-2007 GMC Savana 3500 Van Engine Knock Sensor (AC Delco) for V8 4.8L (8th Vin Digit V)
  • 1999-2007 GMC Sierra 1500 Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit T)
  • 1999-2007 GMC Sierra 1500 Engine Knock Sensor (AC Delco) for V8 4.8L (8th Vin Digit V)
  • 2001-2007 GMC Sierra 1500 Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2002-2007 GMC Sierra 1500 Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit Z)
  • 2005 GMC Sierra 1500 Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit B)
  • 2006-2007 GMC Sierra 1500 Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit N)
  • 2001-2003 GMC Sierra 1500 HD Engine Knock Sensor (AC Delco) for V8 6.0L
  • 2005-2007 GMC Sierra 1500 HD Engine Knock Sensor (AC Delco) for V8 6.0L
  • 1999-2004 GMC Sierra 2500 Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 1999-2000 GMC Sierra 2500 Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit T)
  • 2001-2004 GMC Sierra 2500 Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2001-2007 GMC Sierra 2500 HD Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2001-2004 GMC Sierra 2500 HD Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2001-2007 GMC Sierra 3500 Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2004 GMC Sierra Denali 1500 Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2000-2006 GMC Yukon Engine Knock Sensor (AC Delco) for V8 4.8L (8th Vin Digit V)
  • 2000-2006 GMC Yukon Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit T)
  • 2002-2006 GMC Yukon Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit Z)
  • 2004-2006 GMC Yukon Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2000-2005 GMC Yukon XL 1500 Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit T)
  • 2002-2006 GMC Yukon XL 1500 Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit Z)
  • 2000-2005 GMC Yukon XL 2500 Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2001-2005 GMC Yukon XL Denali Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2005-2006 GMC Yukon XL Denali Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2003-2007 Hummer H2 Engine Knock Sensor (AC Delco) for V8 6.0L (8th Vin Digit U)
  • 2003-2004 Isuzu Ascender Engine Knock Sensor (AC Delco) for V8 5.3L (8th Vin Digit P)
  • 1998-2002 Pontiac Firebird Engine Knock Sensor (AC Delco) for V8 5.7L (8th Vin Digit G)
  • 2004 Pontiac GTO Engine Knock Sensor (AC Delco) for V8 5.7L (8th Vin Digit G)
  • 1998-2002 Pontiac Trans Am Engine Knock Sensor (AC Delco) for V8 5.7L (8th Vin Digit G)
$60.45
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Part #: 1AACD00047

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AC DELCO
Brand #: 213-3521

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