Spendit

2014, DC 6'5 bed, 5.3L, 6 speed - at 78K now. Became 2nd owner at 29K, 3 years ago.......runs and drives like a long cab, 4x4 pickup with very little mods from original. No: oil burn, fluid leaks, H2O intrusion, electrical gremlins (blank screen, rear slider blowouts, PS drop out, lamps going dark) or NVH issues beyond whats expected. Only fluid change to date has been oil at 6K since i've owned it and nothing reported by leasing dealer from previous owner or GMC records. New: Battery spring '19, new 20" KO2's 6 months after I bought it (Michigan winters), putting in LED backup lights this weekend (921 Dieselleds), pads changed due to boat hauls (surge brakes), wipers (again winter beats things up around here), headlight bulb, rear taillight harness (right side). Truck sits outside everyday and night, get a quick bath after a few hunts or salt builds up, has been driven fully loaded from South Dakota to Pennsylvania, added full floor mats to sweep out mud and folding soft tannue cover. Hope I get 1/2 the life out of it from the '94 Sierra I gave up with some 300K on it (not waxed one time :))

Just ordered a set today (May 22, 2020) based on everything I have researched - they are currently 1/2 price, YEP $54.99 the "MEM10" code takes off another 10% and it was free shipping if you can wait a week

Mine was the right side, fought with it for a year - bulbs in and out, cleaned all terminals and checked all connections - I replaced that side harness with new and has been fully functional for ~year now. Sierra, 2014, double cab too

My 2014 did the same thing, after putting in a new battery - I tracked it down to the negative cable on battery itself. There is a ton with the same issue - the factory crimps are weak, thus loss of power at times. I ran a complete new cable - no issue inside a year now. Some run a 2nd wire to ground as a fix too.

Run a search on the troubleshooting section here - tons of posts.....various fixes - but electrical shorting is main issue

I got my notice in the mail last week

Got 42K miles on my KO2's, rotate regularly like stated but they are getting louder now. Same 20" tires, in D range keep fronts aired up to 45PSI and rear at 42PSI all year - they are wearing in great here in MI. The stock GY's where junk at 25K

I have a set off a 2014 - white caps - live in MI too

Mine did it once - after several no starts I tracked it down to the "known" negative battery cable crimp (2014 Sierra) - replaced a year ago, no repeats to date.

Received my notice in the mail yesterday - it states "failure to follow recommended oil change intervals could contribute to this condition." I can already hear the excuses for a sub-par part failure being blamed on oil change recommendations between manufacturer (oil) and DIC.......Too - I do not have the DTC set as of yet however, the condition is present. I have some time before this "fix" runs out - so I will let the garage monkeys figure out the technique before I get in line to change out mine

My '14 had bad corrosion in the sockets - $41 @ Rockauto for a new wire harness - problem solved....

I have read lots of these things failing on this site, here is what I found: Harness needs to be replaced - ordered from rock-auto - anyone else see such corrosion inside 5 years? I could not believe the dirt that is thrown at these bulbs, once I removed tail light assembly. This will become a yearly service - remove, clean and reapply dielectric! 34K Miles - right side blinker indicator "malfunction comes" on - simple, replace bulb (top bulb), lasts a week. Second try, scrub clean with electric cleaner and use good dialectical, install new bulb. Now the lower bulb goes out, same thing - all rusted up, this time cleaning and new bulb do not work. Top and bottom bulbs have rusted the terminals away inside the sockets. Just sharing my findings

2014 - did the same thing. Put a new negative cable on, no issues for 9 months now. Bad crimps in some harnesses, some battery posts are smaller in diameter, so clamp wont tighten down......give that a try next

Drilled and slotted on the bosses Acadia - LOTS more brake noise - I would not put these on my truck. I went with best from Rock Auto, so far great after a year