GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2001 🢒 DeVille 🢒 Engine 🢒 Engine Mechanical - 2.5L (LE8) 🢒 Intake Manifold Removal
  1. Disconnect the water hoses from the throttle body.

    2. Object Number: 648018 Size: SH
  2. Disconnect the injector wire coupler (1).

    3. Object Number: 648017 Size: SH
  3. Disconnect the following electrical connectors:
    4. • The throttle position (TP) sensor (2)
    • The mass air flow (MAF) sensor (1)
    • The idle air control (IAC) valve (3)
  4. Disconnect the ground terminal (5) from the intake collector.
  5. Remove the clamp bracket (4) from the intake collector.

    6. Object Number: 648002 Size: SH
  6. Disconnect the following electrical connectors:
    7. • The manifold differential pressure (MDP) sensor
    • The EVAP canister purge valve (2)
    • The exhaust gas recirculation (EGR) valve (7)
  7. Disconnect the following hoses:
    8. • The PCV hose from the cylinder head cover (9)
    • The breather hose from the throttle body (6)
    • The EVAP canister purge valve hose (1)
    • The water hose (8)
    • The heater hoses (3, 5)
  8. Remove the EGR pipe (4).

    9. Object Number: 647999 Size: SH
  9. Disconnect the following hoses:
    10. • The heater hose (2)
    • The EVAP canister hose (1)
    • The fuel feed hose (4)
    • The fuel return hose (3)
    • The tank pressure control solenoid valve hose

    Object Number: 644083 Size: SH
  10. Disconnect the hose (2) from the idle air control (IAC) valve.
  11. Remove the idle air control (IAC) valve.
  12. Remove the 4 nuts and 2 bolts on the intake collector.

    13. Object Number: 644066 Size: SH
  13. Remove the intake manifold rear crossover pipe (1) and throttle body (2) from the intake manifold (3) as an assembly.

    14. Object Number: 644089 Size: SH
  14. If necessary, remove the 2 nuts and 2 bolts and remove the throttle body (2) from the intake manifold rear crossover pipe (1).

    15. Object Number: 648019 Size: SH
  15. Remove the 8 bolts and 4 nuts on the intake manifold.
  16. Remove the intake manifold.