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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 973 (Engine Controls - 4.8L, 5.3L, & 6.0L (Introduction)) >> Repair Instructions >> Throttle Body Assembly Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the NEW throttle body gasket.
    2. Fig 1: Throttle Body Gasket
    GM492774Courtesy of GENERAL MOTORS CORP.
  2. Install the throttle body.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Install the throttle body nuts.

    Tighten:  Tighten the nuts to 10 N.m (89 lb in).

    4. Fig 2: View Of Throttle Body & Nuts
    GM825837Courtesy of GENERAL MOTORS CORP.
  4. Install the coolant air bleed hose to the throttle body.
  5. Position the coolant air bleed hose clamp at the throttle body.
    6. Fig 3: Coolant Air Bleed Hose & Clamp
    GM1239286Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Verify that the throttle actuator motor harness connector and the connector seal are properly installed and not damaged.
  6. Connect the throttle actuator motor electrical connector (2).
    7. Fig 4: View Of CPA Retainer, Harness Clips, ETC, Coil Harness & Fuel Injectors Electrical Connectors
    GM1235686Courtesy of GENERAL MOTORS CORP.
  7. Install the engine sight shield. Refer to Engine Sight Shield Replacement (4.8L, 5.3L, and 6.0L Engines) or Engine Sight Shield Replacement (6.0L Engine w/RPOs Y91 and Z88) in Engine Mechanical-4.8L, 5.3L, and 6.0L.
  8. Install the air cleaner outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement .
  9. Refill the cooling system. Refer to Draining and Filling Cooling System (with HP2) or Draining and Filling Cooling System (without HP2) in Engine Cooling.
  10. Connect a scan tool in order to test for 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. 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.
  13. Start the engine.
  14. Inspect for coolant leaks.
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