Muffler change only.

[Teegunn]

Service manager where I bought my truck said anything past the cats will not void a warranty unless it’s proven the changes caused the warranty issue to begin with which a muffler swap won’t mess anything up he said. He also told me they’re not one of those dealers who wants to mess with a customers about add ons and warranty related stuff anyway. Some dealers are petty about that kind of thing though and it does happen.

Yeah, that makes sense and is fair.

I didn't buy the truck here in MT where I live, bought it in Nebraska where I was stranded for 4 weeks with my 2020 AT4 and it's service emissions systems problem they never could fix. So the GM dealership here, that changed ownership a few years ago (I used to know the previous owner well enough and he always treated me well so no goofy stuff was likely), the new ownership is a group that owns a whole bunch of dealerships around the state (and I think maybe even out of state too), heck they own EVERY dealership here in town except for Ford and Honda, this group owns GM, Dodge and Toyota, and they are not nearly as good to work with. I have heard of them pulling funny business on warranty issues for other people already, so don't want to use the local GM dealership here if I don't have to.

That being said, IDK why a dealership and their shop would want to piss off a customer or turn away business. If they can get something accepted by GM as warranty work, they will get paid by GM. If they get repair work where they flagged it to get denied by GM, it will likely piss the customer off and the customer may go elsewhere for future business. I think dealerships mostly don't care anymore much though, and with these new trucks there is plenty of electronic or similar stuff you almost have to use a GM dealership to get fixed. They know they kind of have you boxed in.

 

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[usmcfiredog]

Service manager where I bought my truck said anything past the cats will not void a warranty unless it’s proven the changes caused the warranty issue to begin with which a muffler swap won’t mess anything up he said. He also told me they’re not one of those dealers who wants to mess with a customers about add ons and warranty related stuff anyway. Some dealers are petty about that kind of thing though and it does happen.

I get it, but after paying 100k for the truck I didn't want to take any chances as I finally plan on keeping this truck for a long time to come. As I said I am not unhappy with it as it still brings a smile to my face every time I start and drive the truck. Just sucks that my girls sometimes wake up when I start it 545am

 

[Teegunn]

I get it, but after paying 100k for the truck I didn't want to take any chances as I finally plan on keeping this truck for a long time to come. As I said I am not unhappy with it as it still brings a smile to my face every time I start and drive the truck. Just sucks that my girls sometimes wake up when I start it 545am

I totally get that. Makes sense on a 100K truck for sure. Also probably makes sense on an 80K truck (sticker was a little over 80 K on mine, I got it for 74k and change) like my new AT4X.

Also - the sound decibels is part of my equation also. There are 5 little kids living in this house (2, 3, 5, 9 and 12) along with two 19yr olds, plus 3 adults. I don't want to be waking people up either. Which is why I am considering the Magnflow muffler - it just isn't as loud, but still gives nice low rumble and supposedly no drone.

 

[usmcfiredog]

I totally get that. Makes sense on a 100K truck for sure. Also probably makes sense on an 80K truck (sticker was a little over 80 K on mine, I got it for 74k and change) like my new AT4X.

Also - the sound decibels is part of my equation also. There are 5 little kids living in this house (2, 3, 5, 9 and 12) along with two 19yr olds, plus 3 adults. I don't want to be waking people up either. Which is why I am considering the Magnflow muffler - it just isn't as loud, but still gives nice low rumble and supposedly no drone.

That's all that matters. I had the touring before and it was just a bit too soft for me.

 

[Teegunn]

That's all that matters. I had the touring before and it was just a bit too soft for me.

Yep, personal preference and needs are deciding factors.

 

[usmcfiredog]

Yep, personal preference and needs are deciding factors.

I agree. Plus my 7 and 9 year old sometimes have to wake up before that if I have to take them to day care because their mom was working the night before and isn't home to take them to school. All in all its not too bad just feel bad a little bit.

 

[roy826ex]

My truck stickered at 84,895 I paid that. But I had a healthy trade in on a primo 2016 LML deleted done right Denali HD with only 85k on it. It never made it to the sales lot. Bought asap in house. Matters where you’re at cause my deleted HD was outlawed about everywhere outside MS. Damn good truck once deleted. It still has the stupid GM ugly tailpipe and def tank hanging. Clean as a pin all original grandpa owned truck. No lifts stock with KO2s.

My X I had no real problem paying MSRP for, great dealer, old dealer and been in business since the 50s selling gmc around here and buicks. Really good service dept and not a warranty hawk on mods. I actually have the service managers personal cell number on my phone. He prefers I call him instead of just show up on the service row.

They took care of the items onthe truck missing and on BO pronto. I’ll let them install the full Borla touring system I’m buying direct from a Borla retailer I’m Montana. He’s already told me he’d put it on and no issues afterward. They’re also installing some oem mudguards I bought and realized I’m not into working on my truck removing heavy wheels. Told me his guys can knock that out easily. I thought it was just bolt on when I bought it, fail on my part.

Yes she smoked a little when spooled up. Not like the punk diesels do though.

 

[usmcfiredog]

My truck stickered at 84,895 I paid that. But I had a healthy trade in on a primo 2016 LML deleted done right Denali HD with only 85k on it. It never made it to the sales lot. Bought asap in house. Matters where you’re at cause my deleted HD was outlawed about everywhere outside MS. Damn good truck once deleted. It still has the stupid GM ugly tailpipe and def tank hanging. Clean as a pin all original grandpa owned truck. No lifts stock with KO2s.

My X I had no real problem paying MSRP for, great dealer, old dealer and been in business since the 50s selling gmc around here and buicks. Really good service dept and not a warranty hawk on mods. I actually have the service managers personal cell number on my phone. He prefers I call him instead of just show up on the service row.

They took care of the items onthe truck missing and on BO pronto. I’ll let them install the full Borla touring system I’m buying direct from a Borla retailer I’m Montana. He’s already told me he’d put it on and no issues afterward. They’re also installing some oem mudguards I bought and realized I’m not into working on my truck removing heavy wheels. Told me his guys can knock that out easily. I thought it was just bolt on when I bought it, fail on my part.

Yes she smoked a little when spooled up. Not like the punk diesels do though.
View attachment 2904

That's awesome

 

[Furter99]

I’m with good company here and do not feel alone now but very disappointed in the wasted $2500 For the cat backs . Will try to learn here and what to install ,don’t wanna dragster but I want a little more rumble.

 

[FirstTimeTruckOwner]

I know I put these in my truck thread, but thought I should probably share them here as well.

Stock cold start

Corsa muffler warm start and revs.

Installed pics of Corsa Muffler.
View attachment 2877View attachment 2878View attachment 2879

How has this been for you since installed? I just did a muffler delete and it's way too loud in the cab. You experiencing any drone with this muffler swap?

 

[Furter99]

I’m with good company here and do not feel alone now but very disappointed in the wasted $2500 For the cat backs . Will try to learn here and what to install ,don’t wanna dragster but I want a little more rumble.

That is a perfect statement for what I’m experiencing. I have no idea what happened to the original cat back which was louder but these new ones are quieter than a Prius.

 

[Furter99]

That is a perfect statement for what I’m experiencing. I have no idea what happened to the original cat back which was louder but these new ones are quieter than a Prius.

And what I mean by original my AT-4 2021 truck was much louder and of course they ran through the bumper. Don’t know what difference that would make but very disappointed in the 2023 cat back muffler version

 

[ksarauer]

I shot a cold start video of the AT4X with Corsa muffler .

How is the drone at highway speeds, under no load. And have you had a chance to pull a trailer? Wondering if there is any drone at all. tia!

 

[Cc1999]

How has this been for you since installed? I just did a muffler delete and it's way too loud in the cab. You experiencing any drone with this muffler swap?

I think it sounds perfect. No drone.
Only time I think it is just a little loud is at cold start.
Soon as I pop it gear or it warms up a sec and the idle drops back down to normal, the sound level is perfect.

 

[Cc1999]

How is the drone at highway speeds, under no load. And have you had a chance to pull a trailer? Wondering if there is any drone at all. tia!

Yes, I have pulled trailers a couple times with it, no drone issues.
She is a thirsty girl especially with a trailer.
Really not liking this tiny fuel tank with the big gas motor.
Love the big motor, don't really care much one way or the other on the fuel mileage, I purposely didn't buy a Prius.
However I do miss the range I had with my 2021 Diesel AT4, it had same size fuel tank but far better fuel range.