Instrument Cluster Gauges Cut Out

benmcelhaney · December 15, 2020

Hey everyone, I've done some searching for a few days, but nothing seems to be the same issue I'm having. Of course, I could have searched for the wrong thing. Anyway....

I have a 2015 Tahoe LT. 120K miles, give or take. I've got an issue with all of the instrumentation in the cluster. All of the gauges work as normal when you start up the Hoe. Then they will just all start falling to zero at the same time, then come right back up to normal. It kind of flickers like that quite a bit when you first start driving. Then it gets better but keeps doing it here and there while you drive. No issue in power loss, no radio failure, turn signals, headlights, etc.... Once, when I started it up and shifted into drive, the shift indicator was not showing anything so I couldn't see which gear I was in. That's just more of a 'feel for it' type of thing though so I wasn't worried.

It does give warning signals like service brakes, security, tire monitor, etc.... but nothing stays light up and there are no stored codes.

I cleaned the battery terminals and tightened them down. I will go looking for bad grounds some evening this week. Any that i should check first? I'm thinking around the drivers seat, as its winter and I've been in and out while hunting which could have got some water/mud onto a ground in the drivers seat area.

I cant imagine its a fuse, as that should be either good or bad, not spotty. maybe im wrong though?

I also got a lot of hits while searching that it could be a HMU or Ignition switch. Can either of those cause this issue? I did have one time where my backup camera got stuck on after backing up. i drove for about 5 miles to my house, turned off the hoe and it was fine a few minutes later when I got back in.

hope the video works...

Thanks,

Ben

Gregory Krisa · December 15, 2020

Most likely an issue with the cluster either bad ground or maybe bad solder points everything else you have thought of are good places as well

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benmcelhaney · December 15, 2020

Thanks. I'll see if I can find a bad ground and/or solder points. I am going to check fuses first just to be sure, since its easy.

rav3 · December 15, 2020

Sounds like a possible bad "dash" ground. Have you seen this video about it? It's an easy DIY fix. There was an issue at the factory where when the ground was fastened, a part of the sound insulation got under the clamping nut. Watch the video & check out your ground on both sides of the dash.

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