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International Automotive Technicians Network
Re: P0171,P0174 could use some direction
Posted to Technical Discussion Forum on 12/4/2023

Intake gaskets were common leak for these codes when I was at GMC dealer in '05/'06. Set up the scanner to show trims and go to town with some propane (or brake clean if you're brave) and enrich away! Maybe you'll hit the leak spot when you see the trims go be... Login to read more.