Express 3500 V8-4.8L VIN V (2005)
7. Remove the throttle body attaching nuts.
8. Remove the throttle body and the gasket. Discard the gasket.
9. Clean the gasket sealing surfaces.
NOTE: In order to prevent damage to the sealing surfaces, carefully use sharp tools in cleaning the old gasket from the aluminum surfaces.
IMPORTANT:
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DO NOT soak the throttle body in a cold immersion type cleaner. The throttle plate has a factory applied sealing compound. The DAG material is
applied to the outside edge of the plate and the throttle bore to prevent air bypass at closed throttle. Strong solvents or brushing removes the
material. To clean the throttle body following disassembly, use a spray type cleaner such as GM X-66A or GM P/N 1052626. Use a shop towel to
remove heavy deposits.
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The TP sensor and the IAC valve are electrical components, and should NOT come in contact with solvent or cleaner in order to avoid damage.
INSTALLATION PROCEDURE
1. Install the throttle body with a new gasket.
2. Install the throttle body attaching nuts.
NOTE: Refer to Fastener Notice in Service Precautions.
Tighten the nuts to 10 N.m (89 lb in).
3. Connect the coolant hose to the throttle body.
