GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 Envoy XUV 🢒 Engine 🢒 Engine Mechanical - 4.2L 🢒 Cylinder Head Removal

Tools Required

EN-47702 Bolt Extractor Kit


    Object Number: 637587 Size: SH

    Important: Rap on the head of each bolt using an appropriate size punch and hammer. The vibration produced by this procedure assists in successful removal. If a bolt breaks during engine disassembly, a broken bolt extractor kit EN-47702 is available to assist in removal of the remaining bolt segment.

  1. Remove the cylinder head bolts.

    2. Object Number: 637588 Size: SH
  2. Remove the cylinder head.

    3. Object Number: 637586 Size: SH
  3. Remove the cylinder head gasket.