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Tahoe & SuburbanThe power, space, and brutal towing ability make the Tahoe and its longer sibling, the Suburban, arguably the best full size SUV's on the market today.
2015 Chevy Suburban LTZ 5.3 with 110,000 miles. At idle ONLY, I keep getting P0172 and P0175 codes. Not always, not everyday, but if I'm idling for a while the check engine light will come on and it's always those codes. DOD/AFM has been removed by a mechanic, the whole engine has been redone and they used a Diablo i3 to retune it. O2 sensors are brand new, PCV valve is brand new, MAF has been cleaned, air filter is clean. I am getting good readings from the fuel pressure, O2 sensors, MAF sensor, and fuel alcohol %, BUT my long tern fuel trims are at -35% when idling. What's left? HPFP? I know those were recalled in 2015, and mine was taken care of then. *This was the freeze frame data BEFORE the purge valve was replaced* *This was the freeze frame data BEFORE the purge valve was replaced*
P0172 & P0175 2015 Suburban Ltz
