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Home >> GMC >> 1983 >> Magnavan 5.7 L, 475/M40 >> Repair and Diagnosis >> Engine Performance >> System >> Air Injection System >> Maintenance >> Exhaust Emission System Cleaning
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Exhaust Emission System Cleaning

DO NOT attempt to clean diverter valve. Do not blow compressed air through check valve.

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