4.3 L35 , LU3 5.0 L30 , 5.7 L31 Engine Coolant Leak at Intake Gasket - kw consumption smoke white

When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms.

Some customers may comment of a coolant leak that can be diagnosed to the intake gasket area. This may occur at 50,000 miles or higher.

If you have completed the diagnostics and have determined the coolant leak originating from the intake gasket area, replace the intake gaskets. A new gasket material has been developed and is in production beginning with the 2004 Model Year. Service parts are currently available. The new V6 gasket kit part # is 89017460 and the new V8 gasket kit part # is 89017465.

Note: This is an external coolant leak only, it has not been a significant cause for internal engine damage.

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Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance. This diagnostic approach was developed for the vehicle with the VIN you entered and should not be automatically be used for other vehicles with similar symptoms.

(96-03 Chevrolet Astro M/L, Express (GMT-600) G/P , S10 Pick-up Jimmy, Envoy, M/L Vans) and (96-03 GMC Safari, M/L. Savana, (GMT-600) G/P, Sonoma (GMT-325) , Blazer, Bravada (GMT-300) S/T, Sierra, Silverado (GMT-800) C/K. M/L Vans) and (96-03 Oldsmobile, Bravada S/T)

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