2006 gmc engine lite is on code said lean on right and left sides. Replaced plugs, wires, intake gaskets. Checked o2 sensors. One was bad the other ones check good. What can I check next.
What codes did you get? P0171 & P0174?
Looking for a Used Sierra 1500HD in your area?
CarGurus has 115 nationwide Sierra 1500HD listings starting at $2,995.
Search GMC Sierra 1500HD Questions
GMC Sierra 1500HD Experts
Related Models For Sale
Used Cars For Sale