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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 >> Camshaft Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Raise the hood to the service position, perform the following:
    • Remove the hood hinge bolts (1).
    • Raise the hood until vertical.
    • Install the hood hinge bolts until snug in the service position (2).
    2. Fig 1: Identifying Hood Hinge Normal And Service Position Bolt Holes
    GM310799Courtesy of GENERAL MOTORS CORP.
  2. Remove the radiator support. Refer to Radiator Support Replacement in Body Front End.
  3. Remove the front cover. Refer to Engine Front Cover Replacement .
  4. Remove the valve lifters. Refer to Valve Lifter Replacement .
  5. Remove the camshaft sensor bolt and sensor.
    6. Fig 2: View Of Camshaft Position (CMP) Sensor & Bolt
    GM260128Courtesy of GENERAL MOTORS CORP.
  6. Rotate the crankshaft until the timing marks on the crankshaft and camshaft sprockets are aligned.
    7. Fig 3: View Of Camshaft & Crankshaft Sprockets Timing Marks Aligned
    GM156158Courtesy of GENERAL MOTORS CORP.
  7. Remove the camshaft sprocket bolts.
    8. NOTE: Do not turn the crankshaft assembly after the timing chain has been removed in order to prevent damage to the piston assemblies or the valves.
  8. Remove the camshaft sprocket and reposition the timing chain.
    9. Fig 4: Camshaft Sprocket, Bolt & Timing Chain
    GM63263Courtesy of GENERAL MOTORS CORP.
  9. Remove the camshaft retainer bolts and retainer.
    10. Fig 5: View Of Camshaft Retainer Plate
    GM63211Courtesy of GENERAL MOTORS CORP.
    NOTE: All camshaft journals are the same diameter, so care must be used in removing or installing the camshaft to avoid damage to the camshaft bearings.
  10. Remove the camshaft.
    1. Install three M8-1.25 x 100 mm (M8-1.25 x 4.0 in) bolts to the bolt holes in the front of the camshaft.
    2. Using the bolts as a handle, carefully rotate and pull the camshaft out of the engine block.
    3. Remove the three bolts from the camshaft.
    11. Fig 6: View Of Bolts installed In Camshaft Front Bolt Holes
    GM63212Courtesy of GENERAL MOTORS CORP.
  11. If required, clean and inspect the camshaft and bearings. Refer to Camshaft and Bearings Cleaning and Inspection .
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