Jerking acceleration and smell from exhaust

[Soxrule10]

I just bought a new 2021 Sierra 1500 Denali and after driving a couple times, it seems like the truck jerks when I'm accelerating between 30-50 mph.  It's actually a very rough ride.  When parked, there is almost a burning rubber or quasi-coolant smell coming from the exhaust.  Very confused and not very savvy.  Any thoughts? Thanks.

[jnissen]

When new they often have to burn in the exhaust components and you may notice a slight smell from the anti corrosion coatings. Rubber smell is a bit strange. Worst case you can stop into the dealer as it could be something stupid. My daughters car had plastic shields on the brake rotors. Dealer forgot to remove them. She always smelled a burning plastic smell! Yeah worth looking into.