6th Gen Trunk Flooding Defect, This will help! - Page 3

Anom1LE · 10-04-2024, 12:11 PM

Bump to warn those who haven't seen it yet

speedyink1 · 10-04-2024, 08:18 PM

Definitely a real thing and should be taken seriously, but I think I may just stick one or two water alarms down there instead of some phone app device.

keep_hope_alive · 10-09-2024, 11:33 AM

For a few dollars you can just put a battery-powered water sensor in the trunk well and it will start screaming when it gets wet. No need for fancy BT detectors, just a simple water sensor will do.

SS_Don · 10-09-2024, 11:44 AM

Quote:

Originally Posted by keep_hope_alive

For a few dollars you can just put a battery-powered water sensor in the trunk well and it will start screaming when it gets wet. No need for fancy BT detectors, just a simple water sensor will do.

if you are not in or the near the car when it starts screaming at you then it doesn't help.

Whoomba · 10-09-2024, 06:36 PM

Quote:

Originally Posted by ctrlz

It's an idea.
The problem is water can come in pretty fast in heavy rain, and the hole needs to be sized to get that water out before it rises to the point it can cause damage. Also, holes can get partially obstructed by debris, and not drain quickly.
Not saying this won't work, just wondering how many people want a 3/4" hole in the trunk.

There’s a one valve with a gm port number for that. 39123504.

Colin101234 · 10-17-2024, 08:28 PM

Quote:

Originally Posted by Whoomba

There’s a one valve with a gm port number for that. 39123504.

I had an issue with water in my trunk (couple inches of water). Thankfully I noticed it before it caused an issue and GM cleaned it all out and put di electrical grease on everything. GM said they fixed it. But the other day I noticed it was damp in there. Do you think this plug actually fixes the issue? Now I'm concerned.

ctrlz · 10-18-2024, 10:19 AM

Quote:

Originally Posted by Colin101234

GM said they fixed it. But the other day I noticed it was damp in there. Do you think this plug actually fixes the issue? Now I'm concerned.

How did water get in? Bad gasket?
I would put some towels in there and turn a garden hose on the trunk lid. see if it leaks.
Di-electric grease is fine, but I bet they only did the connections. Water that sits in the trunk eventually corrodes circuit boards and fuse box internals. I doubt they disassembled those and coated them. And di-electric grease is only indicated where you want things to be conductive. There are anti-corrosion gels which are not conductive.

Colin101234 · 05-01-2025, 08:26 PM

Sorry I never got back to you, I never found out where it comes from and honestly my solution has just been don't drive it in the rain. It only happened once badly after it sat at the dealership for days in a MASSIVE thunder storm that went for days. I have since decided to just put in the drain plug because I never found the source. But other then that idk what else to do.

Anom1LE · 03-27-2026, 08:24 AM

Up to the top for those who are now starting to experience this.

DC17ZL1 · 03-27-2026, 06:19 PM

There is a TSB for this - I don't remember the # - that involves the dealer drilling a "large" hole for drainage. I never experienced this in my 2017, but decided to buy a WeatherTech trunk liner which has a pretty high lip and looks like it would handle the situation. Mine is garage kept and I'm in AZ so rain is usually not an issue.

Corky · 03-27-2026, 09:03 PM

I decided to follow the TSB and install the plug a while ago...Seemed like the easiest solution...I have a small white paint mark on the lower corner of the back window and I've always wondered why GM had it there...Never had any water issues but the vehicle is always parked in the shop...

lynyrd · 03-31-2026, 04:56 AM

Quote:

Originally Posted by DC17ZL1

There is a TSB for this - I don't remember the # - that involves the dealer drilling a "large" hole for drainage. I never experienced this in my 2017, but decided to buy a WeatherTech trunk liner which has a pretty high lip and looks like it would handle the situation. Mine is garage kept and I'm in AZ so rain is usually not an issue.

I have this mat in my car, it hasn't changed anything, I still have water in the trunk.

lynyrd · 03-31-2026, 05:00 AM

Quote:

Originally Posted by Corky

I decided to follow the TSB and install the plug a while ago...Seemed like the easiest solution...I have a small white paint mark on the lower corner of the back window and I've always wondered why GM had it there...Never had any water issues but the vehicle is always parked in the shop...

Did you place the plugs from underneath the trunk?

bishopts · 03-31-2026, 06:21 AM

Why don't you just pull all the panels off the inside of the trunk, fold the seats down, and use a water hose to pour water over the trunk and roof, and figure out where the water is coming in.

10-04-2024, 12:11 PM	#29
Anom1LE Drives: 18' 2SS 1LE, 94' Z28 Join Date: Apr 2010 Location: Minnesota Posts: 79	Bump to warn those who haven't seen it yet __________________ 2018 Camaro 2SS 1LE - 1,xxxHP D-1XH Procharged, LME 416, GPI/CID Track Attack Heads, BTR top end, Katech oil pump, Pray Tuned, Stainless Works, Anderson Composites, 13GFab, BC Forged & More 1994 Camaro Z28 - 7xxHP Nitrous Outlet Direct Port Nitrous & more, Creator of AggreSSive spoiler, Multi Magazine Featured Camaro Z28 in GMHTP, Super Chevy, Nitto, and Camaro Performers

10-09-2024, 11:33 AM	#31
keep_hope_alive Electrical Engineer Drives: 2023 1SS A10 Black Join Date: Apr 2022 Location: Illinois Posts: 933	For a few dollars you can just put a battery-powered water sensor in the trunk well and it will start screaming when it gets wet. No need for fancy BT detectors, just a simple water sensor will do. __________________ 2023 1SS A10 Black H72/C2U/56W/NPP - Daily Driver 1100: 5/3/22 . . . . . . . 2000: 6/25/22 . . . . . .4000: 8/17/22 . . . . . . . 6000: 9/10/22 Daily Driver mileage update: 64k mi. @ Apr 2026 New Engine @ 22,600 mi. due to dealer confusing bad gas with a bad engine. Build Log: https://www.camaro6.com/forums/showt...6#post11353116

05-01-2025, 08:26 PM	#36
Colin101234 Drives: 2017 FIFTY 2SS HCI Join Date: Feb 2022 Location: CT Posts: 72	Sorry I never got back to you, I never found out where it comes from and honestly my solution has just been don't drive it in the rain. It only happened once badly after it sat at the dealership for days in a MASSIVE thunder storm that went for days. I have since decided to just put in the drain plug because I never found the source. But other then that idk what else to do. __________________ STG 1.5 Frankenstein ported/milled heads(.025), Custom Cam Motion Cam (224,242[.647/.639]) 1 7/8 headers, Ported LT 2 Manifold, Solar Ported 95mm TB, Cold Air Induction CAI, CHE Valve seats, Inconel EX valves, FED/PAC .700 dual springs, VVT Delete, CHE Trunnions, Caddy R Lifters, 3 In Midpipe, NPP Borla atak mufflers, GPI tune.

03-27-2026, 08:24 AM	#37
Anom1LE Drives: 18' 2SS 1LE, 94' Z28 Join Date: Apr 2010 Location: Minnesota Posts: 79	Up to the top for those who are now starting to experience this. __________________ 2018 Camaro 2SS 1LE - 1,xxxHP D-1XH Procharged, LME 416, GPI/CID Track Attack Heads, BTR top end, Katech oil pump, Pray Tuned, Stainless Works, Anderson Composites, 13GFab, BC Forged & More 1994 Camaro Z28 - 7xxHP Nitrous Outlet Direct Port Nitrous & more, Creator of AggreSSive spoiler, Multi Magazine Featured Camaro Z28 in GMHTP, Super Chevy, Nitto, and Camaro Performers

03-27-2026, 09:03 PM	#39
Corky Drives: 2019 1SS M6 Join Date: Feb 2020 Location: Harrisburg,Pa. Posts: 120	I decided to follow the TSB and install the plug a while ago...Seemed like the easiest solution...I have a small white paint mark on the lower corner of the back window and I've always wondered why GM had it there...Never had any water issues but the vehicle is always parked in the shop... Attached Images __________________ 1st Gen ground effects kit GBA black \| Mamo V3 ported TB \| GM CAI \| Velossa Ram Air \| AWE touring axle back\| Xpel PPF \| illuminated door sills \| Upgraded door panels with spectrum lighting \|ZZP pillar pod with Banks Idash pro/AEM wideband

10-04-2024, 08:18 PM	#30
speedyink1 Drives: 2023 Camaro 1SS 1LE 6MT Join Date: Nov 2023 Location: Vancouver Island Posts: 604	Definitely a real thing and should be taken seriously, but I think I may just stick one or two water alarms down there instead of some phone app device.

03-27-2026, 06:19 PM	#38
DC17ZL1 Drives: Metallic Black 2017 Camaro ZL1 Join Date: Mar 2017 Location: Cave Creek, AZ Posts: 2	There is a TSB for this - I don't remember the # - that involves the dealer drilling a "large" hole for drainage. I never experienced this in my 2017, but decided to buy a WeatherTech trunk liner which has a pretty high lip and looks like it would handle the situation. Mine is garage kept and I'm in AZ so rain is usually not an issue.

03-31-2026, 06:21 AM	#42
bishopts Drives: 2017 2ss 6mt Join Date: Mar 2024 Location: dallas Posts: 1,528	Why don't you just pull all the panels off the inside of the trunk, fold the seats down, and use a water hose to pour water over the trunk and roof, and figure out where the water is coming in.

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