GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC K Pickup - 4WD 🢒 Engine 🢒 Engine Mechanical - 7.4L 🢒 Exhaust Manifold Removal

Exhaust Manifold Removal Right with RPO K19

    Notice: Twist the spark plug boot one-half turn in order to release the boot. Pull on the spark plug boot only. Do not pull on the spark plug wire or the wire could be damaged.

  1. Remove the spark plug wire boots from the spark plugs

    2. Object Number: 354054 Size: SH
  2. Remove the AIR tube assembly pipe fitting from the exhaust manifold, if required.
  3. Remove the AIR tube assembly pipe bracket bolt from the cylinder head.

    4. Object Number: 65852 Size: SH
  4. Remove the spark plug heat shields nuts.
  5. Remove the spark plug heat shields.

    6. Object Number: 180881 Size: SH
  6. Remove the exhaust manifold nuts (2) and center bolt (1).
  7. Remove the exhaust manifold.
  8. Remove the exhaust manifold gasket. Discard the exhaust manifold gasket.
  9. Remove the exhaust manifold studs, if required.

Exhaust Manifold Removal Left with RPO K19


    Object Number: 173284 Size: SH
  1. Remove the exhaust gas recirculation (EGR) valve inlet pipe from the intake manifold.
  2. Remove the EGR valve inlet pipe from the left exhaust manifold.

    3. Object Number: 354034 Size: SH
  3. Remove the exhaust adapter, if required.

    4. Object Number: 492025 Size: SH
  4. Disconnect the ECT sensor wiring harness connector from the bracket on the upper intake manifold.
  5. Remove the ECT sensor from the left cylinder head.

    6. Object Number: 180942 Size: SH
  6. Remove the AIR tube assembly pipe fitting from the exhaust manifold, if required.
  7. Remove the AIR tube assembly pipe bracket nut from the exhaust manifold stud.

    8. Notice: Twist the spark plug boot one-half turn in order to release the boot. Pull on the spark plug boot only. Do not pull on the spark plug wire or the wire could be damaged.

  8. Remove the spark plug wire boots from spark plugs.

    9. Object Number: 354056 Size: SH
  9. Remove the spark plug heat shield nuts.
  10. Remove the spark plug heat shields.

    11. Object Number: 180888 Size: SH
  11. Remove the exhaust manifold nuts and center bolt.
  12. Remove the exhaust manifold.
  13. Remove the exhaust manifold gasket. Discard the exhaust manifold gasket.
  14. Remove the exhaust manifold studs, if required.

Exhaust Manifold Removal Left


    Object Number: 173284 Size: SH
  1. Remove the exhaust gas recirculation (EGR) valve inlet pipe from the intake manifold.
  2. Remove the EGR valve inlet pipe from the left exhaust manifold.

    3. Object Number: 354034 Size: SH
  3. Remove the exhaust manifold adapter, if required.

    4. Notice: Twist the spark plug boot one-half turn in order to release the boot. Pull on the spark plug boot only. Do not pull on the spark plug wire or the wire could be damaged.

  4. Remove the spark plug wire boots from spark plugs.

    5. Object Number: 492025 Size: SH
  5. Disconnect the ECT sensor wiring harness connector from the bracket on the upper intake manifold.
  6. Remove the ECT sensor from the left cylinder head.

    7. Object Number: 354056 Size: SH
  7. Remove the spark plug heat shield nuts.
  8. Remove the spark plug heat shields.

    9. Object Number: 180888 Size: SH
  9. Remove the exhaust manifold nuts and center bolt.
  10. Remove the exhaust manifold.
  11. Remove the exhaust manifold gasket. Discard the exhaust manifold gasket.
  12. Remove the exhaust manifold studs, if required.

Exhaust Manifold Removal Right

    Notice: Twist the spark plug boot one-half turn in order to release the boot. Pull on the spark plug boot only. Do not pull on the spark plug wire or the wire could be damaged.

  1. Remove the spark plug wire boots from the spark plugs

    2. Object Number: 65852 Size: SH
  2. Remove the spark plug heat shields nuts.
  3. Remove the spark plug heat shields.

    4. Object Number: 180881 Size: SH
  4. Remove the exhaust manifold nuts (2) and center bolt (1).
  5. Remove the exhaust manifold.
  6. Remove the exhaust manifold gasket. Discard the exhaust manifold gasket.
  7. Remove the exhaust manifold studs, if required.