
Re: Slow 02 response 2013 Silverado 5.3 4X4
I think the 02 heater monitor will run if allowed at start-up. Can you let vehicle get cold and then turn key to on position and monitor 02 activity? Not sure if 2013 is same way but your 02 voltage would change almost immediately when heater was functioning. Login to read more. ![]()
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