getting codes p0172;p0175 on a 09 silverado on 2009 Chevrolet Silverado 1500

Im getting two codes p0172-p0175 on a 09 silverado ext cab eng. code 0. any ideas

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1 answer
Possible restricted air filter, maf sensor or circuit, fuel pressure regulator, injectors etc... Needs to be checked with a REAL scanner.