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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1040 (Engine Controls And Fuel - 6.6L - Troubleshooting & Diagnosis) >> Charge Air Cooler Diagnosis (Charge Air Cooler Air Leak Test) >> Leak Test Passes

Leak Test Passes

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

If the pressure drop is less than 34 kPa (5 psi) in 15 seconds, the leak test passes. Remove the tester by performing the following procedure:

  1. Slowly bleed the air from the cooler by depressing the relief valve on the adapter plate.
  2. Remove the air hose, gage/regulator assembly, and both adapters.
    3. NOTE: Refer to Fastener Notice .
  3. Connect the charge air hose to the turbocharger.

    Tighten:  Tighten the clamp to 8 N.m (70 lb in).

  4. Remove the adapter plate and install the intake air heater. Refer to Intake Air Heater Replacement .
  5. Install both fender wheelhouse liners. Refer to Front Wheelhouse Liner Replacement - Right Side (GMC) or Front Wheelhouse Liner Replacement - Right Side (Chevrolet) and Front Wheelhouse Liner Replacement - Left Side (Chevrolet) or Front Wheelhouse Liner Replacement - Left Side (GMC) .
  6. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
  7. Install the air cleaner boxy tray bracket.
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