Service VME - 01-05 6.6 LLY LB7 Duramax Diesel Engine Air Filter Usage -kw flow turbo intake torn GMT800

The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.

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01-05 6.6 LLY LB7 Duramax Diesel Engine Air Filter Usage.

The Duramax air filter part number 25332443 is specific to the diesel engine due to the operating characteristics of a turbocharged diesel engine. The turbo generates a much greater air volume and flow rate then a normal aspirated engine. The Duramax diesel air filter is reinforced to eliminate damage from the increased air flow of the turbo. The reinforcement is visually identified by the five ribs of epoxy that lays across the pleats of the clean side of the filter.

If the correct air filter is not used, the filter may collapse or be torn in a Duramax application. This damage will allow dust and dirt to be ingested into the turbo and engine causing serious damage. This damage is usually identified at the turbo vanes as well as extreme ware in the cylinder walls of the engine.

We have seen evidence of gasoline engine air filters being used in the Duramax application. The 8.1 gas air filter part number 25313349 will fit into the air box of the Duramax diesel; however, it does not have the required reinforcement of the diesel air filter. The 8.1 liter gas engine air filter should never be used in a Duramax diesel engine.

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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.

(01 02 03 04 05 6.6 LLY LB7 C2 C3 K2 K3 GMT800 Chevrolet Silverado ) and (01 02 03 04 05 6.6 LLY LB7 C2 C3 K2 K3 GMT800 GMC Sierra)

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