Anyone have a pic of the spoiler (3rd brakelight) removed off the cab?

2016 Sierra Owner · December 22, 2019

The reason I ask is because the design of the cab may be contributing to all the water leaks we are seeing. I just can't see under the spoiler on my truck to tell.

Kevin Monaghan · December 22, 2019

10 hours ago, 2016 Sierra Owner said:

The reason I ask is because the design of the cab may be contributing to all the water leaks we are seeing. I just can't see under the spoiler on my truck to tell.

Some views in these

tbare54 · December 22, 2019

Not sure what GM engineering was thinking on this design. Build a dam and theoretically it should not leak, but even the HOOVER DAM leaks. The engineer that designed this should be stripped of his degree and made to wash windows at GM CORPORATE offices. As for GM they are sitting there with potential for a lot of expensive repair cost, as these vehicle get older.

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Davidj98 · December 22, 2019

I replaced my brake light with camera brake light, here’s a few pics...

Kevin Monaghan · December 23, 2019

1 hour ago, Davidj98 said:

I replaced my brake light with camera brake light, here’s a few pics...

David, did you need to drop the whole headliner or just the rear area?

Davidj98 · December 23, 2019

Just the rear area, I took off plastic rear panels (that house seat belt), hanger hooks above rear windows and side panels that house front belts. You can then gentle and carefully pull far rear End of headliner away from rear window trim.

oh and also pull rear overhead light, pulls straight down with 2 clips.

Kevin Monaghan · December 23, 2019

15 hours ago, Davidj98 said:

Just the rear area, I took off plastic rear panels (that house seat belt), hanger hooks above rear windows and side panels that house front belts. You can then gentle and carefully pull far rear End of headliner away from rear window trim.

oh and also pull rear overhead light, pulls straight down with 2 clips.

Great info, Thank you! Getting ready to start my emergency vehicle up-fit.

2016 Sierra Owner · December 23, 2019

Thanks for the reply. Not exactly how I pictured it under there but, it does look like the water goes right down on top of the seam sealer. No lip above the window to keep the rain from directly running to that arealike the older gen had.

Jason Milam · July 3, 2021

Davidj98, how did you get the yellow clips that hold the spoiler on to release? I can’t seem to figure out how to get something on them to squeeze them enough to release the spoiler.

Jason Milam · July 3, 2021

On 12/22/2019 at 8:15 PM, Davidj98 said:

Just the rear area, I took off plastic rear panels (that house seat belt), hanger hooks above rear windows and side panels that house front belts. You can then gentle and carefully pull far rear End of headliner away from rear window trim.

oh and also pull rear overhead light, pulls straight down with 2 clips.

Davidj98, how did you get the yellow clips that hold the spoiler on to release? I can’t seem to figure out how to get something on them to squeeze them enough to release the spoiler.

Davidj98 · July 4, 2021

Just helped a friend pull his today, I ended up shaking and pulling, if feels like you going to break them but they will release. There are only two yellow plastic clips. Metal is also thin where they connect, the hole was a bit deformed, so we used a smaller hammer to make metal flat again around the hole were clip connects. I don’t think there is access to those clips from cab.

Also make sure small black washer is is still around clip before reinstall, they fall off easily.

Davidj98 · July 4, 2021

Also on the 2021 I was working on today I did not have to mess with dome light.

Jason Milam · July 4, 2021

12 hours ago, Davidj98 said:

Just helped a friend pull his today, I ended up shaking and pulling, if feels like you going to break them but they will release. There are only two yellow plastic clips. Metal is also thin where they connect, the hole was a bit deformed, so we used a smaller hammer to make metal flat again around the hole were clip connects. I don’t think there is access to those clips from cab.

Also make sure small black washer is is still around clip before reinstall, they fall off easily.

Thanks! I was so worried about breaking those clips that I was afraid to pull on the spoiler too much. After reading your response, I went out this morning and was able to remove the spoiler and install my new 3rd brake light. I appreciate the info!