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2003 Chevrolet Tahoe LS 4dr 1500 4WD

Questions & Answers

Mechanic Q: Error codes - P0171, P0174?

Just received these codes over the weekend. Car is running fine - although gas mileage has decreased in the past 6 months. Full tune-up about a month ago - wires, plugs, fuel/air filter. Just had the BG Air/Fuel Induction Service on 4/12/13 done at Curry's in Arlington, VA. Have not yet seen much change in gas mileage yet (although I've only put in 2 tanks of gas since), but since the service, the check engine light has come on with the above listed codes. Can you tell me what it might entail to have codes corrected? Thanks, Joanne B.