AC DELCO K040378HD (Heavy Duty) [SERPENTINE BELT]

This AC DELCO serpentine belt is a new part. It is the same part that you would receive if you purchased it from your local GM dealer.

Specifications:

  • Brand New AC Delco Serpentine Belt
  • Outstanding crack resistance at extreme temperatures
  • Designed for the toughest applications; a problem-solving belt
  • Replaces dealer part numbers: F4BZ 8620 B, F4BZ8620B, 12554028, 12569346, 12576447, 19163445, 56992PY30040, 56992PY3A02, 56992PY3A020, 56992PY3A020M2, 2312733300, 8943821060, 8970645550, 1K2AA15908, F388HHVMA02, B3C715909C, B63H15909, MD308925, 11720D4001, 119200P500, 11920F6501, 773021, 809213040
  • Built to strict quality control standards
  • Direct replacement
    • Rib Number: 4
    • Top Width: 0.56 Inches
    • Effective Length: 37.89 Inches

Part Details

  • Product Grade: Heavy Duty

Wear and Tear

This item is backed by a 60-day warranty against defects in materials and workmanship under its intended use. The warranty does not cover normal wear and tear. 

  1. step : Removing the Air Intake Hose (0:40)
    • 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 : Removing the Radiator Fan Shroud (1:23)
    • Remove the two 10mm bolts from the radiator fan shroud
    • Unclip the radiator hose from the fan shroud
    • Pry the four plastic clips out of the fans shroud with a flat blade screwdriver
    • Pull the fan shroud up and out
  3. step : Removing the Serpentine Belt (2:39)
    • Attach a 15mm socket and ratchet to the serpentine belt tensioner
    • Turn the tensioner counterclockwise to loosen the belt
    • Pull the belt off the tensioner
    • Release the tensioner
    • Pull the belt off all the pulleys
  4. step : Removing the A/C Compressor Belt (3:16)
    • Remove the five 15mm bolts from the skid plate
    • Attach a 3/8 inch ratchet to the A/C belt tensioner
    • Pull the tensioner down to loosen the belt
    • Pull off the A/C belt
  5. step : Installing the New A/C Belt (4:01)
    • Feed the new A/C belt into place
    • Attach a 3/8 inch ratchet to the A/C belt tensioner
    • Pull the tensioner down to loosen the belt
    • Pull the belt around the pulleys
    • Release the tensioner
    • Lift the skid plate into place
    • Insert the five 15mm bolts into the skid plate
  6. step : Reinstalling the Serpentine Belt (5:24)
    • Familiarize yourself with the belt routing diagram
    • Route the belt onto all but one pulley, following the diagram
    • Attach a 15mm socket and ratchet to the serpentine belt tensioner
    • Turn the tensioner counterclockwise to loosen the belt
    • Pull the belt onto the remaining pulley
    • Release the tensioner
  7. step : Reinstalling the Fan Shroud (6:35)
    • Push the fan shroud into place
    • Push the four plastic clips into the fan shroud
    • Clip the radiator hose into the fan shroud
    • Insert the two 10mm bolts into the fan shroud
  8. step : Reinstalling the Air Intake Hose (7:15)
    • Push the intake hose into place
    • Tighten the intake hose clamps with a flat blade screwdriver
    • Clip the radiator hose to the air intake hose

Tools needed for replacement:

    Ratchets & Related

  • 3/8 Inch Drive Ratchet
  • Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 10mm Socket
  • 15mm Socket

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Vehicle Fit

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  • 2002-2006 Cadillac Escalade Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2007-2008 Cadillac Escalade Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.2L for ACDelco K040378HD
  • 2003-2006 Cadillac Escalade ESV Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2007-2008 Cadillac Escalade ESV Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.2L for ACDelco K040378HD
  • 2002-2006 Cadillac Escalade EXT Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2007-2008 Cadillac Escalade EXT Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.2L for ACDelco K040378HD
  • 2002-2008 Chevy Avalanche 1500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 5.3L for ACDelco K040378HD
  • 2007-2008 Chevy Avalanche 1500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2003-2008 Chevy Express 1500 Van Air Conditioning Compressor Heavy Duty Serpentine Belt V8 5.3L for ACDelco K040378HD
  • 2003-2005 Chevy Express 2500 Van Air Conditioning Compressor Heavy Duty Serpentine Belt V8 5.3L for ACDelco K040378HD
  • 2003-2008 Chevy Express 2500 Van Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2003-2008 Chevy Express 2500 Van Air Conditioning Compressor Heavy Duty Serpentine Belt V8 4.8L for ACDelco K040378HD
  • 2003-2008 Chevy Express 3500 Van Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2005-2008 Chevy Express 3500 Van Air Conditioning Compressor Heavy Duty Serpentine Belt V8 4.8L for ACDelco K040378HD
  • 1999-2008 Chevy Silverado 1500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 4.8L for ACDelco K040378HD
  • 1999-2008 Chevy Silverado 1500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 5.3L for ACDelco K040378HD
  • 2001-2008 Chevy Silverado 1500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2007 Chevy Silverado 1500 Classic Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2007 Chevy Silverado 1500 Classic Air Conditioning Compressor Heavy Duty Serpentine Belt V8 5.3L for ACDelco K040378HD
  • 2007 Chevy Silverado 1500 Classic Air Conditioning Compressor Heavy Duty Serpentine Belt V8 4.8L for ACDelco K040378HD
  • 2001-2003 Chevy Silverado 1500 HD Serpentine Belt for Air Conditioning Compressor Heavy Duty ACDelco K040378HD
  • 2005-2006 Chevy Silverado 1500 HD Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2007 Chevy Silverado 1500 HD Classic Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 1999-2000 Chevy Silverado 2500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 5.3L for ACDelco K040378HD
  • 1999-2004 Chevy Silverado 2500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2001-2008 Chevy Silverado 2500 HD Serpentine Belt V8 6.0L for Air Conditioning Compressor Heavy Duty ACDelco K040378HD
  • 2007 Chevy Silverado 2500 HD Classic Serpentine Belt V8 6.0L for Air Conditioning Compressor Heavy Duty ACDelco K040378HD
  • 2001-2008 Chevy Silverado 3500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2007 Chevy Silverado 3500 Classic Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2000-2008 Chevy Suburban 1500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 5.3L for ACDelco K040378HD
  • 2006-2008 Chevy Suburban 1500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2000-2008 Chevy Suburban 2500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2000-2008 Chevy Tahoe Air Conditioning Compressor Heavy Duty Serpentine Belt V8 5.3L for ACDelco K040378HD
  • 2000-2008 Chevy Tahoe Air Conditioning Compressor Heavy Duty Serpentine Belt V8 4.8L for ACDelco K040378HD
  • 2003-2008 GMC Savana 1500 Van Air Conditioning Compressor Heavy Duty Serpentine Belt V8 5.3L for ACDelco K040378HD
  • 2003-2008 GMC Savana 2500 Van Air Conditioning Compressor Heavy Duty Serpentine Belt V8 4.8L for ACDelco K040378HD
  • 2003-2008 GMC Savana 2500 Van Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2003-2005 GMC Savana 2500 Van Air Conditioning Compressor Heavy Duty Serpentine Belt V8 5.3L for ACDelco K040378HD
  • 2003-2008 GMC Savana 3500 Van Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2004-2008 GMC Savana 3500 Van Air Conditioning Compressor Heavy Duty Serpentine Belt V8 4.8L for ACDelco K040378HD
  • 1999-2008 GMC Sierra 1500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 5.3L for ACDelco K040378HD
  • 1999-2008 GMC Sierra 1500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 4.8L for ACDelco K040378HD
  • 2001-2008 GMC Sierra 1500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2007 GMC Sierra 1500 Classic Air Conditioning Compressor Heavy Duty Serpentine Belt V8 5.3L for ACDelco K040378HD
  • 2007 GMC Sierra 1500 Classic Air Conditioning Compressor Heavy Duty Serpentine Belt V8 4.8L for ACDelco K040378HD
  • 2007 GMC Sierra 1500 Classic Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2001-2003 GMC Sierra 1500 HD Serpentine Belt for Air Conditioning Compressor Heavy Duty ACDelco K040378HD
  • 2005-2006 GMC Sierra 1500 HD Serpentine Belt for Air Conditioning Compressor Heavy Duty ACDelco K040378HD
  • 2007 GMC Sierra 1500 HD Classic Serpentine Belt for Air Conditioning Compressor Heavy Duty ACDelco K040378HD
  • 1999-2000 GMC Sierra 2500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 5.3L for ACDelco K040378HD
  • 1999-2004 GMC Sierra 2500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2001-2008 GMC Sierra 2500 HD Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2007 GMC Sierra 2500 HD Classic Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2001-2008 GMC Sierra 3500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2007 GMC Sierra 3500 Classic Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2000-2008 GMC Yukon Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2000-2008 GMC Yukon Air Conditioning Compressor Heavy Duty Serpentine Belt V8 5.3L for ACDelco K040378HD
  • 2000-2008 GMC Yukon XL 1500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 5.3L for ACDelco K040378HD
  • 2000-2008 GMC Yukon XL 2500 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2003-2007 Hummer H2 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.0L for ACDelco K040378HD
  • 2008 Hummer H2 Air Conditioning Compressor Heavy Duty Serpentine Belt V8 6.2L for ACDelco K040378HD

This part replaces:

  • ACDelco K040378HD
Only 1 left in stock
Part #: 1AESB00053


Order must be placed by 4pm ET
AC DELCO
Brand #: K040378HD

How-to Video:

(08:00 min)