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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1404 (Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L (3 Of 5)) >> Repair Instructions - Off Vehicle (1 Of 3) >> Timing Chain and Sprocket Removal >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Flex Plate & Bolts
    GM1658140Courtesy of GENERAL MOTORS CORP.
    NOTE: Do not apply threadlock to the flex plate bolts at this time.
  1. Temporarily install the automatic transmission flex plate and bolts. Refer to Automatic Transmission Flex Plate Installation .
    2. Fig 2: View Of Special Tool J 42386-A & Bolts
    GM1658136Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Fastener Caution .
  2. Install the J 42386-A:  tool (1) and bolts. Use 1 M10 - 1.5 x 120 mm and 1 M10 - 1.5 x 45 mm bolt for proper tool operation. Tighten the J 42386-A:  tool bolts to 50 N.m (37 lb ft).
    3. Fig 3: View Of Camshaft Sprocket, Sprocket Bolt & Timing Chain
    GM1759750Courtesy of GENERAL MOTORS CORP.
    CAUTION: 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.
  3. Remove and discard the camshaft sprocket bolt (206).
  4. Remove the camshaft sprocket (205) and timing chain (208).
    5. Fig 4: View Of Timing Chain Tensioner & Bolts
    GM1658178Courtesy of GENERAL MOTORS CORP.
  5. Remove the bolts (231) and timing chain tensioner (232).
    6. Fig 5: View Of Crankshaft Sprocket Special Tools
    GM1658180Courtesy of GENERAL MOTORS CORP.
  6. Use the J 41816-2:  protector (1), the J 41558:  remover (2), bolts (3), and the J 8433:  puller J 8433:  puller (4) in order to remove the crankshaft sprocket.
    7. Fig 6: View Of Crankshaft Sprocket
    GM1658182Courtesy of GENERAL MOTORS CORP.
  7. Remove the crankshaft sprocket (207).
    8. Fig 7: View Of Crankshaft Key & Keyway
    GM156149Courtesy of GENERAL MOTORS CORP.
  8. Remove the crankshaft sprocket key, as required.
  9. Remove the automatic transmission flex plate and bolts. Refer to Automatic Transmission Flex Plate Removal .
  10. Remove the J 42386-A:  tool and bolts.
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