# 2020 Cadillac CT6 - Infotainment issue **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** cadillac\ **Created:** [January 7, 2023, 4:20pm UTC](https://community.cartalk.com/t/2020-cadillac-ct6-infotainment-issue/188360 "2023-01-07T16:20:09Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![LynnBFahnestock](https://avatars.discourse-cdn.com/v4/letter/l/c67d28/32.png) [@LynnBFahnestock](https://community.cartalk.com/u/LynnBFahnestock)\ **Post date:** [January 7, 2023, 4:20pm UTC](https://community.cartalk.com/t/2020-cadillac-ct6-infotainment-issue/188360/1 "2023-01-07T16:20:10Z")
Navigation SD Card message. No SD card error. NAV sd card is not functioning properly. What is the problem? The card or the reader? ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [January 7, 2023, 4:22pm UTC](https://community.cartalk.com/t/2020-cadillac-ct6-infotainment-issue/188360/2 "2023-01-07T16:22:46Z")
One word ( Warranty ) . ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [January 7, 2023, 5:01pm UTC](https://community.cartalk.com/t/2020-cadillac-ct6-infotainment-issue/188360/3 "2023-01-07T17:01:22Z")
Is the SD card in the slot? I have seen used cars with missing SD cards. ---
**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\ **Post date:** [January 7, 2023, 7:05pm UTC](https://community.cartalk.com/t/2020-cadillac-ct6-infotainment-issue/188360/4 "2023-01-07T19:05:41Z")
Is the SD card Lock/Unlock switch moved fully towards the card contacts, in the upward (Unlocked) position? Important: DO NOT remove the SD card with the ignition ON. This can corrupt the SD Card and cause navigation related errors. Important: ONLY remove the card with the key OFF and the driver’s door open. ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [January 8, 2023, 7:51pm UTC](https://community.cartalk.com/t/2020-cadillac-ct6-infotainment-issue/188360/5 "2023-01-08T19:51:25Z")
> [@weekend-warrior](#): > > ONLY remove the card with the key OFF and the driver’s door open. Just curious, understand why key should be OFF , but why does the door have to be open? ---
**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\ **Post date:** [January 8, 2023, 8:40pm UTC](https://community.cartalk.com/t/2020-cadillac-ct6-infotainment-issue/188360/6 "2023-01-08T20:40:01Z")
To be honest I am not quite sure about why the door needs to be open. I got this info from the dealer TSB so I posted it figuring it might help OP. ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [January 8, 2023, 8:45pm UTC](https://community.cartalk.com/t/2020-cadillac-ct6-infotainment-issue/188360/7 "2023-01-08T20:45:11Z")
Retained accessory power; the radio stays on for ten minutes after the ignition is switched off. Opening the door shuts off the radio. ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [January 8, 2023, 8:51pm UTC](https://community.cartalk.com/t/2020-cadillac-ct6-infotainment-issue/188360/8 "2023-01-08T20:51:14Z")
Technology sometimes ties us into knots. Reminds me of that movie _Brazil._ This could be a good topic for a stand-up comedian. Years ago, first widely-sold home computers had floppy discs. Story about customer talking to service dept on phone. Customer: I’m having problem with my floppy disc Service dept: What’s the problem? Customer: screen says “not ready” when I try to save my file Service: Close the door first, then try it again. Service: (hears a bang sound) Customer: Ok ,tried it again, still doesn’t work. Service: What was that bang sound? Customer: That was me closing the door. Service: Do you mean the door to the room? … Customer: Yes lol …