Muffler baffle

[KShi]

My 2019 GMC Sierra muffler baffles took a crap and are rattling. I’m out of bumper to bumper because miles and apparently my extended warranty doesn’t cover exhaust systems. Has anyone had any good outcome from putting on a muffler their self? I took my truck to the dealership and they want $1350 to do it. 

[AEmedic]

You can do a bolt on cat-back from any of 25 (or more) companies.  I chose Borla.  Took a couple of hours last weekend, but I bought the dual exhaust set up so I had to cut the OE setup off right near the cats.  This type of mod is easy to do in your own driveway.

[Taco_Ninja]

I would Google muffler shops in your area and get a few quotes. I've never paid more than $300-400 for a muffler/exhaust job (this with parts included). Simple cut and weld would probably run about $100. Get a used part off the forums or on your local Craigslist for $50 and have them weld it in. Junkyard parts are also another option for cheap if you own a reciprocating saw or pipe cutting tool.

 

Boom $150 out the door for factory parts and repair.

 

With most folks wanting more sound I always see a dumpster full of parts out in front of every shop. See if they will cut you a deal for take-offs or go with aftermarket if you want a different sound (bolt-on kit like the aforementioned Borla should run you $800-1000). There are a lot of options, just depends on what you're looking for.

[AJMBLAZER]

What he said. A good muffler shop will weld in the muffler of your choice for a couple hundred. 
 

That keeps the factory exhaust system which is actually pretty good quality and build.