Clock Time Inaccurate While Engine Not Running

SandyNeck · November 23, 2017

Happy Thanksgiving Guys!

Has anyone noticed that the time-of-day clock on the infotainment screen runs significantly behind unless the ignition switch is in the 'run' position? If I shut the truck off without opening a door to kill the accessories, or if the key is in the 'accessory' position, the time displayed is not current (e.g. actual time is 3:00PM, but the clock displays 2:45PM). It updates to current time and displays accurately once I start the truck. The inaccurate reading has bitten me more than once. Has anyone else experienced this? Does anybody know if there is a fix available? Thanks for any input.

Edited November 23, 2017 by SandyNeck
Correction

Paintor · November 23, 2017

LoL....there's some humor we need for the Holidays...

...........'New for 2017'.....Ultimate Package......includes a clock that doesn't work.

Paintor · November 27, 2017

I checked my 2016 Sierra with the high end Io3 radio....turn truck off and stay inside....clock keeps the correct time.

tnchevy · November 28, 2017

No answer for you because mine stays accurate but what I can't figure out is how the clock updates itself when the time changes! I do not subscribe to Onstar but I do have XM radio so one of the other is updating the clock but don't know which. That could be something to look at why yours is off when the truck is not running.

frankan9 · November 28, 2017

Just noticed the same thing this morning.I restarted the truck and the time updated immediately.

mouse24 · November 29, 2017

mine does the same thing.

Rylcchmn · April 6, 2020

Did anyone ever figure out this clock issue. I'm experiencing the same issue.

JimCost2014 · April 8, 2020

On 4/6/2020 at 12:02 PM, Rylcchmn said:

Did anyone ever figure out this clock issue. I'm experiencing the same issue.

Welcome to the site.

Does it switch back to normal time once you start driving again?

I think it is a communication break down between the truck and your cell phone data, when the engine is tuned off. Try making a call with your phone (Bluetooth) while the engine is off and see if the time stays correct.