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1997 GMC 1500 Truck with engine codes P0719 and P0420, how do I fix that problem?

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1997 GMC 1500 Truck with engine codes P0719 and P0420, how do I fix that problem?

Vehicle: 1997 GMC 1500 Truck

1 Answer

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P0719 GMC - Brake Switch Circuit Low Input
Read more: https://www.autocodes.com/p0719_gmc.html

P0420 GMC - Catalyst System Low Efficiency Bank 1
Read more: https://www.autocodes.com/p0420_gmc.html

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