Question about 2000 GMC Sierra
Codes 171 and 174 showing lean in both banks. Changed plugs and wires, truck started running good. Codes came back a couple of hours later. Truck still runs fine. Possibly Injectors?
If both 171 and 174 come up (both banks lean) suspect Mass Airflow Sensor or fuel pressure issue.....according to autozone's troubleshooting guides
Posted on Nov 21, 2012
Try some injector cleaner in order to see if the lean condition improves. Lean conditions can sometimes be caused by o2 sensors or other sensors that are not within specifications.
Posted on Jul 08, 2010
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Apr 11, 2014 | GMC Sierra Cars & Trucks
Jan 13, 2013 | 2005 GMC Sierra
Nov 24, 2010 | 2003 GMC Sierra 1500
Jan 18, 2010 | 1992 GMC Sierra
Oct 02, 2009 | 2004 GMC Sierra Denali
Feb 26, 2009 | 1985 GMC C2500
884 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: