I have a 97 chevy c10 5.0 liter. P0420 keeps coming on any answers?

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FIX CODE P0420 ON CHEVROLET CRUZE, CHEVY SONIC Catalyst System
FIX CODE P0420 ON CHEVROLET CRUZE, CHEVY SONIC Catalyst System

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I have a 97 chevy c10 5.0 liter. P0420 keeps coming on any answers?
I have a 97 chevy c10 5.0 liter. P0420 keeps coming on any answers?

2012 Chevrolet Equinox 135,000miles 2.4L P0420 Keeps coming back. I
2012 Chevrolet Equinox 135,000miles 2.4L P0420 Keeps coming back. I

2012 Chevrolet Equinox LTZ - 4dr SUV 2.4L auto
2012 Chevrolet Equinox LTZ - 4dr SUV 2.4L auto

2012 Chevy Equinox Review
2012 Chevy Equinox Review

2012 Chevrolet Equinox 135,000miles 2.4L P0420 Keeps coming back. I
2012 Chevrolet Equinox 135,000miles 2.4L P0420 Keeps coming back. I

2012 Chevy Equinox Review
2012 Chevy Equinox Review

P0420 Chevy Equinox Issue and Solutions to Fix Properly - UNCRD LAC
P0420 Chevy Equinox Issue and Solutions to Fix Properly - UNCRD LAC