Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Recommended Posts

Bought a 2016 GMC Yukon XL with 52k on it last November, this spring it started throwing this code, we would put in Lucas and it would go away after a day and stay off for weeks to a month. In August it became an every other week deal, 3 weeks ago it also had a Cylinder 6 misfire where we changed all the spark plugs, it does run better overall since changing but has since came up with the same code once again and isn’t going away this time...husband and his uncle who is a mechanic are stumped, we are supposed to drive to Florida in 3 weeks for a family wedding so we’d really like to get this figured out, it’s not in warranty anymore with 75K on it now...anyone have any similar issues and resolutions!! So frustrating to have such a new vehicle with these big problems as we had to replace the condenser in it also this summer!

Share this post


Link to post
Share on other sites
48 minutes ago, Tgarner15 said:

...husband and his uncle who is a mechanic...

Had something similar but on a Chevy.  Pull the number 6 fuel injection wire and check the condition.  If good, pull the injector and clean or replace and see if the idle levels and code disappears.  If you replace, you could probably do it for about 60 bucks, cheaper than renting a vehicle to catch the wedding.  If this works, drop some STP concentrated fuel injection cleaner in the tank for a little insurance.

Share this post


Link to post
Share on other sites

Special policy for injectors depending what state you are in. Most likely injector failure.

 

Some 2016 and 2017 model year Cadillac Escalade, Cadillac Escalade ESV, Chevrolet Silverado, Chevrolet Suburban, Chevrolet Tahoe, GMC Sierra, GMC Yukon, and GMC Yukon XL vehicles, equipped with a 5.3L or 6.2L engine, may have a condition which affects fuel injector function. Under certain circumstances one or more of the vehicle’s fuel injectors may deliver an improper amount of fuel to the engine. If this occurs, the Malfunction Indicator Lamp (Check Engine Light) will illuminate, the engine may idle or run rough, and the vehicle may stall. A diagnostic trouble code related to the fuel injector may be set. This special coverage only applies to vehicles in these states: California, Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, and Washington.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.




×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.