2000 GMC Yukon XL 1500 Q&A

2000 GMC Yukon XL 1500 Question: code reader indicated a new mass air flow sensor vehicle did not fix problem

replaced MAF sensor,new fuel filter vehicle still hard to start plus runs ragged now diagnosed no codes -
Answer 1
Use scanner with 'live data' capability for diagnosis , not a code 'reader'. Check for loose pin connections at sensors and for vacuum leaks. -