1976 Chevy Blazer 4.1 Liter Emission Requirements

What are the 49 state federal smog emission components for a 76 Chevy blazer with a 4.1 liter Heavy duty emissions?

I tried smogging my Chevy Blazer at two smog stations today that would not smog my truck because their reference material did not have a 76 chevy blazer 4.1L federal emission for a heavy duty 6200 GVWR. I know exactly what my truck is supposed to have since I have owned it since 1998 and smogged it several times. I need something to show these guys the emission components for my truck and a vacuum diagram as well. Where should I go to get this info?


Answer:		According to the MOTOR Emissions Applications Guide a federal emissions equipped 1976 Chevy 4.1 Liter engine (for GVW 6001 LBS & OVER) needs to be equipped with: Positive Crankcase Ventilation (PCV), ACL (Preheat Tube - Air filter to heat shield), and Spark control (distributor advance timing control). See Photo Attached: Emission Application Chevy 1976 There is no call for AIS, EGR, EVAP, CAT, or O2. As far as your Chevy Blazer's vacuum diagram, we can only recommend purchasing a factory or aftermarket older engine shop manual. posted by SmogTips Support

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