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Re: Slow 02 response 2013 Silverado 5.3 4X4
Posted to Technical Discussion Forum on 1/29/2020 9 Replies

Bradley, is there a normal evap. pressure @ 37% fuel. My readings were -107 kpa for quite awhile, then -80 kpa, then -21 kpa (only for a moment). This truck will not run those three monitors. Could the tank vapor pressure sensor be off? No codes. Thank you, Lo... Login to read more.

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