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Home >> Chevrolet >> 2004 >> Avalanche 2500 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Mechanical (Repair Instructions -- 1 Of 3) -- 4.8L, 5.3L & 6.0L) >> Repair Instructions (On-Vehicle & Off-Vehicle - Part 1) >> On-Vehicle Repair Instructions >> Engine Valley Cover Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Remove the intake manifold. Refer to Intake Manifold Replacement .
  2. Gently pry up the rubber covers.
  3. Disconnect the knock sensor electrical connectors.
    4. Fig 1: View Of Rubber Covers
    GM832149Courtesy of GENERAL MOTORS CORP.
  4. Remove the knock sensors.
    5. Fig 2: View Of Knock Sensors
    GM309864Courtesy of GENERAL MOTORS CORP.
  5. Remove the engine valley cover bolts.
  6. Remove the engine valley cover and gasket.
  7. Discard the old gasket.
    8. Fig 3: View Of Engine Valley Cover, Gasket & Bolts
    GM65048Courtesy of GENERAL MOTORS CORP.
  8. Remove the knock sensor oil seals (1) from the cover (2).
    9. Fig 4: View Of Knock Sensor Oil Seals & Cover
    GM490851Courtesy of GENERAL MOTORS CORP.
  9. If required, clean and inspect the engine valley cover. Refer to Engine Valley Cover Cleaning and Inspection .
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