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Home >> GMC >> 2003 >> Yukon Denali >> Repair and Diagnosis >> External Pages >> Different car >> Section 521 (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 does not describe the selected car, but rather 6 other vehicles, including the 2004 GMC Yukon XL, 2004 GMC Yukon, 2004 Chevrolet Tahoe, 2004 Chevrolet Suburban, and 2004 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  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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