2014 GMC Sierra 1500 door speakers stopped working

[Scott50150]

All the door speakers stopped working just the other day but my speakers in my dash still work and the door chime, I’ve tired a battery reset. Here’s my current codes some help fixing it would be nice before taking it to the shop. 

[mikeyk101]

Usually when you get that many faults, I would start by checking all the grounds. There are several including one on passenger side just to rear of front tire. It may need to be removed and fully cleaned off around it. Also the main ground coming off the battery. Test that for resistance. And since it's a 2014, definitely check the G218 ground that can be found under/next to the left dash speaker cover and make sure that some of the insulation isn't caught under the nut. Remove the nut and trim back insulation if needed so that gets full contact. IIRC, there may be a similar one under/next to the right speaker as well.