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Home >> GMC >> 1972 >> G25/G2500 Van Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Air Injection Reactor >> Service Procedures >> Notes

Service Procedures: Notes

At 12, 000 miles or 12 months, complete system should be checked for proper operation. Condition of engine tune-up should be checked whenever air injection is not operating properly. Servicing of pump is limited to replacement of centrifugal fan filter (late models), pressure relief (early models) or entire pump.