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Home >> Chevrolet >> 2004 >> Avalanche 2500 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Mechanical (Repair Instructions -- 2 Of 3) -- 4.8L, 5.3L & 6.0L) >> Repair Instructions (Off-Vehicle - Part 2) >> Engine Valley Cover Removal

Engine Valley Cover Removal

WARNING: This page is about a different variant/trim than selected.
  1. Remove the knock sensor wire harness.
    2. Fig 1: View Of Knock Sensor Wire Harness
    GM309859Courtesy of GENERAL MOTORS CORP.
  2. Remove the knock sensors.
    3. Fig 2: View Of Knock Sensors
    GM309864Courtesy of GENERAL MOTORS CORP.
  3. Remove the valley cover bolts.
  4. Remove the valley cover and gasket.
  5. Discard the valley cover gasket.
    6. Fig 3: View Of Engine Valley Cover, Gasket & Bolts
    GM65048Courtesy of GENERAL MOTORS CORP.
  6. Remove the knock sensor oil seals (520) from the cover (555).
    7. Fig 4: View Of Knock Sensor Oil Seals & Valley Cover
    GM1277106Courtesy of GENERAL MOTORS CORP.
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