My GMC 2014 Sierra 1500, 5,3l, is throwing P0175 / P0172 codes.
This is a rich mix in banks 1 & 2.
Further diagnosing is needed, but a leaky pump is my guess.
The original part is GM 12697966, superseded by 12711662.
I've searched and called around. The local GM parts dealer confirmed that the part is on "indefinite back order".
Weird, right?
Best regards,
Jay