i have a 02 tahoe LT im getting the 171 and 174 bank 1 bank 2 lean codes after replacing intake gasket, fuel pump, fuel presure regulator, spark plugs, wires, air filter, fuel filter,throtle pos sensor, MAF sensor,and o2 sensores. im getting frustrated cause i cant seem to find the problem and neither can 2 different mechanics. can someone give me a idea what else i could be cause im bout stumped
