That is definitely one thing I miss about my 6.2L on my last truck. It had Sport mode which basically made the exhaust sound like it had a cat back. It was awesome!
You may want to consider the Baby Max 3.0L LZ0 diesel engine. It's quick off the line, punchy when passing because of all that torque and gets so much better gas mileage. You'll be lucky to get 17mpg with 6.2L and I routinely get ~24mpg with diesel. I love my Baby Max!
I have a 2025 ZR2 3.0 diesel and love it. Had the 6.2L before and don't miss it. The diesel is quick off the line, fuel efficient, powerful and quiet. The only thing I miss about the 6.2L is the sound of the exhaust. That's about it.
I average about 22mpg with mixed driving. I haven't made any big road trips yet but some are saying 26mpg and above. I'm actually surprised you're getting almost 19mpg with the 6.2L. Are you using the stock Goodyear 32" tires?
Have you considered the new LZ0 3.0 diesel? I went from a 2024 Silverado HC with 6.2L gasser and traded it in b/c of recall and went with the 3.0 diesel and have no regrets. This motor is snappy with nice acceleration off the line, quiet at hwy speeds and so much more fuel efficient than the...
Isn't the 3.0 Duramax terrific? I sold my 2024 Silverado with the 6.2L and went with the 3.0 Duramax too and so far loving it. Snappy acceleration, quiet, fuel efficient. I love this motor! Don't miss 6.2L (other than that exhaust note when in Sport mode lol).