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2017 Sierra, sometimes mirror wont unfold

NorCalSLT
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NorCalSLT Enthusiast

NorCalSLT

Posted
Posted

I'll lock my truck and fold the mirrors at night.
Its happened twice now that when I go out in the morning and hold unlock, only the driver side mirror will not open.
I have to get in the truck and press the button to fold unfold a couple of times until it will actually open.

Anyone else having this issue? I ignored it the first time but am now growing wary.

4k miles on truck...

JimCost2014 Senior Enthusiast

JimCost2014

Posted
Posted

I'll lock my truck and fold the mirrors at night.

Its happened twice now that when I go out in the morning and hold unlock, only the driver side mirror will not open.

I have to get in the truck and press the button to fold unfold a couple of times until it will actually open.

Anyone else having this issue? I ignored it the first time but am now growing wary.

4k miles on truck...

If one gets out sequence, open and close the mirrors 3 times in a row. This will line up the gears and they will work as a pair again.
EFLine Enthusiast

EFLine

Posted
Posted

What Jim said is correct, this issue has been happening to my truck but would also happen to my suburban I had as well. For me, it has always been the passenger side, on both trucks. Just would always have to "recycle" the gears and it would work.

 

Also found it would go in spurts, sometimes twice in a week, sometime it wouldn't happen for 6 months...

ChevyRoofer Senior Enthusiast

ChevyRoofer

Posted
Posted

What Jim said is correct, this issue has been happening to my truck but would also happen to my suburban I had as well. For me, it has always been the passenger side, on both trucks. Just would always have to "recycle" the gears and it would work.

 

Also found it would go in spurts, sometimes twice in a week, sometime it wouldn't happen for 6 months...

 

X2 - only happens to me on the passenger side when it's below 40-50 degrees.

 

I just hop in the truck and press the fold/unfold button a couple times and it's fine.

Donstar Senior Enthusiast

Donstar

Posted
Posted

If something like this is not working the way I expect, and I can't find a solution in my owners' manual, I report it to my service adviser. I make sure my concerns are recorded in case a history is required in the future. Annoyances like these can be frustrating and there is no need to put up with them. Take full advantage of your bumper to bumper warranty!

  • Like 1
Sierra Boy Enthusiast

Sierra Boy

Posted
Posted

If something like this is not working the way I expect, and I can't find a solution in my owners' manual, I report it to my service adviser. I make sure my concerns are recorded in case a history is required in the future. Annoyances like these can be frustrating and there is no need to put up with them. Take full advantage of your bumper to bumper warranty!

100% correct! Let the dealer know of your problems with the mirrors...I had the passenger side done a few months ago and just had the drivers sides done yesterday. There is a problem with them not folding so let the dealer know and use that warranty.

 

Sierra Boy

kammi10 Enthusiast

kammi10

Posted
Posted

 

X2 - only happens to me on the passenger side when it's below 40-50 degrees.

 

I just hop in the truck and press the fold/unfold button a couple times and it's fine.

ive had the same exact thing happen on my 14. at first i thought it was frozen since it only happens in the winter. but then it randomly did it when it was warmer out too.

 

havent had an issue in a while tho

CounterMeasure Enthusiast

CounterMeasure

Posted
Posted (edited)

My '15 also has issues with the passenger side. I cycle them a couple of times, and then it gets back in sync. I plan to bring it up to the dealership when I have to drop it off for the next thing that breaks in this truck. Its too much of a pain to drop it off and leave it there for just that, have them order a mirror, and then replace it.

Edited by CounterMeasure
kammi10 Enthusiast

kammi10

Posted
Posted

My '15 also has issues with the passenger side. I cycle them a couple of times, and then it gets back in sync. I plan to bring it up to the dealership when I have to drop it off for the next thing that breaks in this truck. Its too much of a pain to drop it off and leave it there for just that, have them order a mirror, and then replace it.

 

thats exactly what my service guy said. they would just have to replace the mirror. of course it happened when i needed the truck and couldnt drop it off to have them replace it so i just told him i'd have them fix that next time its in there

truckguy82 Senior Enthusiast

truckguy82

Posted
Posted

Happened to my passenger side, but it had nothing to do with syncing them, needed lubrication. Worked perfectly ever since.

NorCalSLT Enthusiast

NorCalSLT

Posted
  • Author
Posted

If one gets out sequence, open and close the mirrors 3 times in a row. This will line up the gears and they will work as a pair again.

Thats exactly what I had to do.

Thanks for the feedback everyone, Ill report it to make sure a log is being kept in case of future issues.

Krusty Enthusiast

Krusty

Posted
Posted

From the manual:

 

 

Resetting the Power Folding

Mirrors

Reset the power folding mirrors if:

. The mirrors are accidentally

obstructed while folding.

. They are accidentally manually

folded/unfolded.

. The mirrors will not stay in the

unfolded position.

. The mirrors vibrate at normal

driving speeds.

Manually fold both mirrors if they

are out of sync. Fold and unfold the

mirrors three times using the mirror

controls to reset them to their

normal position. A popping noise

may be heard. This sound is normal

Rolling Thunder Enthusiast

Rolling Thunder

Posted
Posted

Happened to my passenger side, but it had nothing to do with syncing them, needed lubrication. Worked perfectly ever since.

 

This ^^

 

Duplicate issue here and a few shots of silicone spray in the mirror's hinge crevices solved the issue.. I would try this before a service call.

Sean Neilan Enthusiast

Sean Neilan

Posted
Posted

Similar issue but my passenger side sometimes won't fold. Haven't had an issue with it unfolding. It happens so rarely though that I know if I bring it for service they won't be able to duplicate, and it never happens when I can just bring it while it's stuck.

  • 3 years later...
auribe New Member

auribe

Posted
Posted

My 2016 Sierra Denali 2500HD left mirror does not closes when folding the mirrors.  does anyone has a solution to this issue.  I heard that this is a common issue with Sierra Denali trucks and is possible due to a defected motor in the mirror.  Any suggestions will be greatly appreciated.

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