Heated Driver Mirror not Working

426ted · January 21, 2019

Stupid driver's mirror does not heat up anymore. I bought this truck in May 2016 and have 92K kilometers. Anyone have a fix for this issue or a link on how to fix it? I looked at the usual sources and found zilch. The quality on this truck compared to my '09 sucks. Thanks,

DougFL · January 22, 2019

Here are some Diagrams and part numbers for you: https://www.cheapestgmparts.com/auto-parts/2016/gmc/sierra-1500/slt-trim/5-3l-v8-gas-engine/body-cat/outside-mirrors-scat

Not sure what the availability of used parts in your area but it would be worth checking.

Mr. Z71 · January 22, 2019

Just my initial thoughts... the heating element on the back side of the mirror glass is non-functional due to an open circuit or excessive resistance caused by a bad electrical connection. I've had to replace both glasses on my 2003 due to excessive resistance of the heating element. I'd start by checking resistance of the element, should be fairly low. My '03 GM replacement mirrors measured 6.3 and 6.4 ohms. Check out YouTube for videos on removing and replacing the glass. About a 5 minute job on my 2003, fortunately I have not had to do this on my 2015... yet. I'd think your 2016 should be of similar design as a 2003 as far as glass removal and installation. Hope this points you in the right direction.