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Were you able to do this and it fit snuggly around plastic shroud? Mine pulled away and there is only a 1/8" piece of plastic lip sticking out away from firewall so I see no way the grommet can snap back around it. Just seems to sit loosely against firewall.

I picked up my new 2024 Chevy Silverado RST a few weeks back after trading my 2020 RST in and immediately bought the Kicker sub/amp and did not fully read the instructions and never saw the note about cutting a cross in the pass through area of grommet so needless to say after 1.5 hours of scratching my head and telling my son there is no way this wire is going through there I cut a cross in it...then saw the note 10 minutes later. I see the Kicker instructions talk about holding the grommet in place during the pull through but nothing about what to do if you actually did it. My question is my grommet pulled away from the firewall inside the truck on the bottom half. I see no way this thing actually snaps or goes around the very short section of the plastic adapter the main wiring harness is going through so I just pushed it back against the firewall and pushed it in the center around the main wiring harness all the way around to get it flush again. I see you pulled yours away on the bottom half as well. Was yours able to actually seat into a groove or is it just pressed against the firewall the best you could? It doesn't give me much confidence that it would actually block fluids or smoke from coming in from inside the engine compartment. I researched all I could but only get videos and articles on how to run the wires and where. I may put some black rtv sealent in the plastic channel from the engine compartment side where you run the wire through as extra precaution. Any suggestions are greatly appreciated!

Thanks Calgator! They said they checked a few things and even blew up into the drain tube for the AC and everything checked out and wasn't blocked. I haven't noticed it since they changed the pump mid week and refilled the fluid so maybe it was related to the failing water pump. No more squeak though, now just a random noticeable chirp a few seconds after it cranks up now from same area lol...who knows.

I've read the forums and heard everyone's frustrations with the squeaking noise at start up and how some said it was a "normal" sound. Well at almost 28k I finally took the truck in to the dealer and left it overnight. They called this morning and said the tech immediately heard the noise (that was very gradually getting louder since I bought it new) and found the water pump was making a loud noise, the pulley was wobbling so bad it had started shredding the belt and the idler pulley/tensioner was also going bad. They are overnighting the parts and hopefully will have it repaired tomorrow or the next day. Never heard of a water pump going bad that quick and mine was the first they had seen with that problem. On a side note, I have been noticing for 6 months or more at random when I crank it, that you hear a water sloshing. noise come from the passengers side dash area. I heard dodges and nissan trucks having that issue but never the Chevy/GMC. Does anyone have that issue too? I'm wondering if that is attributed to the bad water pump? Hope this helps others with the noise. Quick diagnoses is pull the belt and grab the pulleys and see if they are wobbling. I read one other post in all these forums that said they to had a bad water pump with squeaking.

I don't have a bent push rod to my knowledge but my truck is in for a new water pump that was squeaking and shaft wobbled enough to start shredding belt and damage idler pulley. Could be a bad water pump in other words seperate from the push rod.

@newdude I ran the Corsa system on my old 2004 Chevy Silverado 5.3 since it was almost new until I traded it on this truck and loved it. Quiet while driving but nice startup sound and when accelerating. I almost wanted more sound out of it but anyone I passed said it was pretty loud under WOT.

Yes I know a bunch have done this and I read most post about doing it. I am going to go to a Borla S-Type system 140779BC and decided in the interim to cut off the muffler and both flappers and had a 3.5" pipe welded in place. Here are my thoughts after driving it around town and open road for a day. Don't do it lol! Upon initial startup at the muffler shop I was impressed and love the deep throaty rumble, even cold start the next day was great but that's where it ends. The drone inside the cab is way too loud and yes when DFM kicks in you get a really loud helicopter sound that comes and goes at random. Put it in Manual mode and not helicopter sound and a little quieter. The drone is even louder under mild acceleration or when the motor is under load going up a hill even on open road. The interesting part is the throttle response feels sluggish compared to before the mod. When you get on it it moves really good but still feels a little like it lost a few hp. Maybe that's me but that's the way it feels. The sound under wide open throttle is pretty good, and as my neighbor put it...I sound like a teenager coming down the road lol! He did say it was LOUD! He was several hundred yards away outside his house as I left and accelerated hard down the road. In town driving the drone and sluggishness is very annoying. Definitely leave it in manual mode in town. I did a few hard downshifts and never experienced any popping sounds from deceleration. If you get on it hard for a few seconds then let off, be prepared to have it screaming at you while waiting for the transmission to finally upshift and rpms drop...and everyone starting at you. It also highlighted what our motors do under low speed. While on some back roads I was taking it real easy around 30 mph at a steady speed and ever so often the motor would blurp the rpms up then right back down but never shifted. It did this more than once as if it was the computer adjusting for fuel/air and who knows what else but still very weird. I have thought I noticed it do it before with muffler/flappers on but this was confirmation it does do it sometimes. In summary, I would not recommend this mod without at least leaving the flappers on as I read in one other post or just swap the muffler. I'm now pushing up my timeline for the Borla or going back to the shop and have them add at least an aftermarket muffler back on. Anyone have anything else to add or similar experience please share.

You sure that chirp isn't coming from the front of the engine? A lot of people, including myself, have that annoying chirp/squeak coming from the front of the engine. I have a 2020 Chevy RST w/ 6.2 and it chirps pretty much every startup after sitting even for a little bit then goes away

2020 SIlverado RST with 6.2L, I have 2 flappers on mine as well. One right before and one right after muffler.

Thanks Flyinwells! This was very useful in getting me started on my Blackvue install. I made a new topic with a PDF of my install and some of the issues I encountered. I also included a link back to your article as well. I am definitely going to upgrade to the mount you are using in the near future. Thanks again!

2020 Chevy Silverado RST with 6.2L. Been on the board a while now looking at all the mods and great info! Thought it was time to share mine. Pretty much stock except nerf bars (that may get changed out) and front tint. Put the first wax job on yesterday. Aftermarket exhaust is next, 2 channel dash cam, and black rims. Dash cam is after a Toyota hit me in rear at 5 mph last week...thank God I had left my old rusty trailer ball on truck...no damage except a hole in his front bumper!