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when did GM put catalytic converters on Sierra 305s?

01-06-2011, 05:12 PM

lakeroadster

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Join Date: Sep 2009

Location: High Plains of Colorado

Posts: 2,485

Re: when did GM put catalytic converters on Sierra 305s?

Quote:

Originally Posted by baradonai

Did these trucks even have cats?

I believe 1975 was the first year that they were required on 1/2 ton trucks.

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