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Home >> Chevrolet >> 2009 >> TrailBlazer 6.0 H, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 5.3L & 6.0L - Introduction >> Repair Instructions >> Throttle Body Assembly Replacement >> Installation Procedure
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Installation Procedure

    Fig 1: View Of Throttle Body Assembly
    GM1401966Courtesy of GENERAL MOTORS CORP.
  1. Install a NEW throttle body gasket (509).
  2. Install the throttle body (508).
    3. CAUTION: Refer to Fastener Caution .
  3. Install the throttle body bolts (538) and nuts (507). Tighten the bolts/nuts to 6 N.m (53 lb in).
    4. Fig 2: View Of Auxiliary Heater Inlet & Outlet Hoses/Pipes
    GM901492Courtesy of GENERAL MOTORS CORP.
  4. Connect the 2 throttle body engine coolant hoses to the throttle body.
  5. Position the throttle body hose clamps.
    6. Fig 3: Identifying Throttle Actuator Motor & Electrical Connector
    GM1522415Courtesy of GENERAL MOTORS CORP.
  6. Connect the throttle actuator motor electrical connector (1) to the throttle actuator motor (2).
    7. Fig 4: View Of Air Cleaner Outlet Duct
    GM898123Courtesy of GENERAL MOTORS CORP.
  7. Install the air cleaner outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement .
  8. Refill the cooling system. Refer to Cooling System Draining and Filling (LL8) or Cooling System Draining and Filling (LH6, LS2) .
  9. Verify that the vehicle meets the following conditions:
    • The vehicle is not in a reduced engine power mode.
    • The ignition is ON.
    • The engine is OFF.
  10. Connect a scan tool in order to test for a proper throttle-opening and throttle-closing range.
  11. Operate the accelerator pedal and monitor the throttle angles. The accelerator pedal should operate freely, without binding, between a closed throttle, and a wide open throttle (WOT).
  12. Start the engine.
  13. Inspect for coolant leaks.
  14. Perform the throttle learn procedure. Refer to Throttle Learn .
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