2014 Chevy Silverado Navigation and XM issue

Bryce McDonald · April 12

I just bought a 2014 Chevy Silverado 1500. When I press the navigation button on the screen, I get no map or anything, just a big "N" (I will attach a picture of what I see). Any idea what could be causing this?

I should also note, as maybe this issue is related or maybe it isnt, XM doesn't seem to work either. It just says "no XM signal reception may be blocked" (even in an open area) and we have sent refreshes and contacted XM multiple times with no luck.

mikeyk101 · April 13

I have a feeling that you don't have the full navigation but rather the "turn by turn" navigation. That requires OnStar and then you just hear the directions through the radio. Kind of useless IMHO. That is what came on my 2016.

As far as XM radio, I'm not sure but it sounds like it might be an antenna issue. Maybe it became disconnected from the module. These have also been known to have issues with the antenna. Do you have the sharkfin antenna on the outside of roof above driver side?

kickass audio · April 13

Yeah you don't have anything more than onstar navigation which I hate to break to you but your 2014 is too old to have onstar service since it ran off 3G cell service which has since been shut down for over a year. Unless you pay a hefty price to upgrade the HMI and radio to get a newer version that supports android auto you won't have navigation built into the radio.

The XM issue I will say I also had with my old 2014 and the high frequency antenna on the roof was rusty inside and shot. What's different on yours is you actually have a working compass, my high voltage antenna was so dead that onstar was a dud for service back before they banned 3G cell service and XM had no channels working, not even channel 1, and the compass would cut in and out at random then the compass on the radio and instrument cluster flat out died on me. You might also have had a previous owner who was paranoid on being spied on and unplugged one of the antenna wires that controls the XM service. One of the antenna wires is responsible for onstar and the built in compass, the other wire is for your XM service. Try and pull the screen off the dash and look behind the touchscreen and make sure the antennas are all plugged in then peek at the connection in the headliner by the antenna.

If you really want XM service AND your compass direction updates as you drive around then your antenna is likely on it's way out and you can buy another one to replace it. I sealed mine to the roof with some silicone since the rubber seal wasn't that great and it worked perfect except for no onstar service. You also don't need to pull the entire headliner if you have small enough arms like I do. Just pull the A pillar and B pillar, remove your driver vanity mirror and the clip that holds the vanity mirror up on the roof and pull the rubber door gasket away from the roof. Then pull the headliner down just a little and sneak in a wrench and I want to say it was a typical 10mm bolt you need to remove and unplug the 2 antenna wires and pull it out through the top of the roof.

Edited April 13 by kickass audio

Homewrecker007 · April 13

I recommend getting the newer HMI and radio modules so you can use carplay/Android auto for music and navigation.

Bryce McDonald · April 13

19 hours ago, mikeyk101 said:

I have a feeling that you don't have the full navigation but rather the "turn by turn" navigation. That requires OnStar and then you just hear the directions through the radio. Kind of useless IMHO. That is what came on my 2016.

As far as XM radio, I'm not sure but it sounds like it might be an antenna issue. Maybe it became disconnected from the module. These have also been known to have issues with the antenna. Do you have the sharkfin antenna on the outside of roof above driver side?

Yes, I do have the shark fin antenna on the roof.

Bryce McDonald · April 13

18 hours ago, kickass audio said:

Yeah you don't have anything more than onstar navigation which I hate to break to you but your 2014 is too old to have onstar service since it ran off 3G cell service which has since been shut down for over a year. Unless you pay a hefty price to upgrade the HMI and radio to get a newer version that supports android auto you won't have navigation built into the radio.

The XM issue I will say I also had with my old 2014 and the high frequency antenna on the roof was rusty inside and shot. What's different on yours is you actually have a working compass, my high voltage antenna was so dead that onstar was a dud for service back before they banned 3G cell service and XM had no channels working, not even channel 1, and the compass would cut in and out at random then the compass on the radio and instrument cluster flat out died on me. You might also have had a previous owner who was paranoid on being spied on and unplugged one of the antenna wires that controls the XM service. One of the antenna wires is responsible for onstar and the built in compass, the other wire is for your XM service. Try and pull the screen off the dash and look behind the touchscreen and make sure the antennas are all plugged in then peek at the connection in the headliner by the antenna.

If you really want XM service AND your compass direction updates as you drive around then your antenna is likely on it's way out and you can buy another one to replace it. I sealed mine to the roof with some silicone since the rubber seal wasn't that great and it worked perfect except for no onstar service. You also don't need to pull the entire headliner if you have small enough arms like I do. Just pull the A pillar and B pillar, remove your driver vanity mirror and the clip that holds the vanity mirror up on the roof and pull the rubber door gasket away from the roof. Then pull the headliner down just a little and sneak in a wrench and I want to say it was a typical 10mm bolt you need to remove and unplug the 2 antenna wires and pull it out through the top of the roof.

I was wondering if that antenna was going bad. Sucks that it’s $90 for a replacement. But it is what it is. Thank you for the input and instructions!

Bryce McDonald · April 13

21 hours ago, kickass audio said:

Yeah you don't have anything more than onstar navigation which I hate to break to you but your 2014 is too old to have onstar service since it ran off 3G cell service which has since been shut down for over a year. Unless you pay a hefty price to upgrade the HMI and radio to get a newer version that supports android auto you won't have navigation built into the radio.

The XM issue I will say I also had with my old 2014 and the high frequency antenna on the roof was rusty inside and shot. What's different on yours is you actually have a working compass, my high voltage antenna was so dead that onstar was a dud for service back before they banned 3G cell service and XM had no channels working, not even channel 1, and the compass would cut in and out at random then the compass on the radio and instrument cluster flat out died on me. You might also have had a previous owner who was paranoid on being spied on and unplugged one of the antenna wires that controls the XM service. One of the antenna wires is responsible for onstar and the built in compass, the other wire is for your XM service. Try and pull the screen off the dash and look behind the touchscreen and make sure the antennas are all plugged in then peek at the connection in the headliner by the antenna.

If you really want XM service AND your compass direction updates as you drive around then your antenna is likely on it's way out and you can buy another one to replace it. I sealed mine to the roof with some silicone since the rubber seal wasn't that great and it worked perfect except for no onstar service. You also don't need to pull the entire headliner if you have small enough arms like I do. Just pull the A pillar and B pillar, remove your driver vanity mirror and the clip that holds the vanity mirror up on the roof and pull the rubber door gasket away from the roof. Then pull the headliner down just a little and sneak in a wrench and I want to say it was a typical 10mm bolt you need to remove and unplug the 2 antenna wires and pull it out through the top of the roof.

Sorry for the double post, but quick question. Since onstar wont work on my vehicle anyways, do you think the cheaper shark fin antennas with only one plug for XM would work? I know if I did that, onstar wouldn't work but I mean I cant use it anyways.

kickass audio · April 14

IDK where you are looking for $90 but the one I bought was a GM OEM from rockauto and their most expensive high frequency antenna is $67.89 but the one my 2014 takes is running 57.79.

Since there were a ton of versions for that antenna on the market I strongly advise poking your head in the roof above the panel and see what color connector you have and if you really have 2 probes and not 1. You can't fit a single slot one into a dual slot from the body wire as they are slightly different sizes.

Bryce McDonald · April 14

36 minutes ago, kickass audio said:

IDK where you are looking for $90 but the one I bought was a GM OEM from rockauto and their most expensive high frequency antenna is $67.89 but the one my 2014 takes is running 57.79.

Since there were a ton of versions for that antenna on the market I strongly advise poking your head in the roof above the panel and see what color connector you have and if you really have 2 probes and not 1. You can't fit a single slot one into a dual slot from the body wire as they are slightly different sizes.

I have not poked my head up to look at the number of connectors, I just assumed I had 2 of them from research I have done. As all the single connector ones I have found say "Not for trucks with onstar". And the ones with the 2 separate wires are much more expensive.

I will definitely try to look in the panel and see, it just sucks that I have to disassemble everything just to look lol.