Please Help, 2015 Silverado Electrical System Going Crazy!

SilveradoPerson · August 4, 2021

I have a 2015 Silverado LT and the electrical system is going crazy. If I'm driving and pull up on the power window buttons, or hit the turn signal, I will occasionally have the infotainment screen go black for a few seconds (and the AC fan will also stop for a few seconds). STABILTRAK will also briefly pop up sometimes. Then it will bounce back to normal. Driving is not affected so far. Sometimes this will also happen if I'm making a sharp turn or u-turn. This used to happen only once in a blue moon, but now is happening constantly. I looked on youtube and tried the infotainment blue cord fix and tried fixing the G218 ground wire. Neither worked for me. Any ideas out there? I see alot of discussion on this but no concrete solutions. I'm getting so frustrated with this, and hope my truck isn't going down the tubes.

Edited August 4, 2021 by SilveradoPerson
Updated symptoms

JimCost2014 · August 4, 2021

33 minutes ago, SilveradoPerson said:

I have a 2015 Silverado LT and the electrical system is going crazy. If I'm driving and pull up on the power window buttons, or hit the turn signal, I will occasionally have the infotainment screen go black for a few seconds (and the AC fan will also stop for a few seconds). STABILTRAK will also briefly pop up sometimes. Then it will bounce back to normal. Driving is not affected so far. Sometimes this will also happen if I'm making a sharp turn or u-turn. This used to happen only once in a blue moon, but now is happening constantly. I looked on youtube and tried the infotainment blue cord fix and tried fixing the G218 ground wire. Neither worked for me. Any ideas out there? I see alot of discussion on this but no concrete solutions. I'm getting so frustrated with this, and hope my truck isn't going down the tubes.

Welcome to the site.

Age of your battery?

SilveradoPerson · August 4, 2021

Feb 2018 it looks like. Thanks, long time reader, but first post.

Silverado61 · August 4, 2021

This may sound off the wall but I had all sorts of wonky electrical issues with my 2014 Silverado 1500LT and I tracked it down to a broken wire in the driver door wire harness. Chevy did a great job in making that harness really tight and causing the wires to flex excessively breaking one of the wires. Open the drivers door with the truck running and flex the harness as much as you can and see if you can make the errors pop up. It sounds off the wall but with the way the computers are in the modern vehicles everything is tied in some way together so if there's a short circuit it can cause all sorts of weird issues.

Spendit · August 4, 2021

Went thru similar in a 2014 Sierra - ended up replacing the actual ground from battery to engine and cab wire. Original crimps on OE cable bad....getting the block connector off was a PITA, only cost some blood

mysery1 · August 4, 2021

I had a bad positive cable once causing me various and intermittent problems. Cable looked good but when I removed it checked it's resistance it was high.

Williamdd14 · June 23

My 2015 Chevy 1500 has a no audio, stablatrak, no turn signals, driver window only works, no headlights, no power steering and no AC any advice? Starts and drive just fine but hard to turn with the now no power steering

PhilB · June 23

Check your battery and cables, especially the ground cable. See the posts above. When the battery voltage is low, all kind of wonky things happen. Replace the battery if it is old.

briannah610 · July 10

On 8/3/2021 at 11:04 PM, SilveradoPerson said:

I have a 2015 Silverado LT and the electrical system is going crazy. If I'm driving and pull up on the power window buttons, or hit the turn signal, I will occasionally have the infotainment screen go black for a few seconds (and the AC fan will also stop for a few seconds). STABILTRAK will also briefly pop up sometimes. Then it will bounce back to normal. Driving is not affected so far. Sometimes this will also happen if I'm making a sharp turn or u-turn. This used to happen only once in a blue moon, but now is happening constantly. I looked on youtube and tried the infotainment blue cord fix and tried fixing the G218 ground wire. Neither worked for me. Any ideas out there? I see alot of discussion on this but no concrete solutions. I'm getting so frustrated with this, and hope my truck isn't going down the tubes.

I’m going through the same thing! Did you ever figure it out?

sk · July 18

It is a know problem on these trucks. Look up PIT5405. It covers a whole bunch of troubleshooting procedures, especially related to ground points.

Edited July 18 by sk

MikeBMW · July 20

On 7/18/2024 at 4:45 PM, sk said:

It is a know problem on these trucks. Look up PIT5405. It covers a whole bunch of troubleshooting procedures, especially related to ground points.

PIT5405 was superseded by PIT5405a but same thing.
https://static.nhtsa.gov/odi/tsbs/2015/MC-10115119-9999.pdf

Edited July 20 by MikeBMW

JimCost2014 · July 20

Ground point G218, drivers' side, just under the dash cover by the speaker. Workers were given the option to clear the insulation away from the bare metal, or just bolt it together and go home at 4:59pm on a Friday night, guess what they chose?

Edited July 20 by JimCost2014

sk · July 26

On 7/19/2024 at 9:23 PM, MikeBMW said:

PIT5405 was superseded by PIT5405a but same thing.
https://static.nhtsa.gov/odi/tsbs/2015/MC-10115119-9999.pdf

Actually the latest is either Rev D or E, but I don't have access to the database anymore, so I was just listing the "base" PIT number. If somebody takes that to a dealer they can pull the latest revision.

mikeyk101 · July 26

3 hours ago, sk said:

Actually the latest is either Rev D or E, but I don't have access to the database anymore, so I was just listing the "base" PIT number. If somebody takes that to a dealer they can pull the latest revision.

You actually posted the 5405D in another thread here. Click on the arrow to the right of the header and it will take you directly to the post and download.

Edited July 26 by mikeyk101