Well my 01 24 valve is noisy with the windows down, but not bad with them up. I also shut down at drive ups and always stay a truck length back of the person being served when in line.
If it is an SLT Laramie it will likely have a noise reduction package, extra insulation.
Russ & Paula
The Beagles Hedwig and Precious.
2001 Dodge 2500 4X4, 5.9 Cummins 5 speed, 3.55 gears, Pacbrake PRXB, DS Power Puck, 265K.
2005 Copper Canyon 293 FWSLS
Its about as loud as my 7.3 is or my sons 2002 5.9. Loud out side not so bad inside. Not sure what the DB rating would be. I like the sound of these older diesels. Exhaust setups can add to or quite some of the noise. I have a MBRP on my 97 and my son had stock with Walker muffler. The both sound about the same to me loudness wise. In either of out trucks if we turn the radio to vol 8 or higher you can hear music clearly. His Dodge is a Work Truck No carpet and just basic everything. I think the sound would compare well with a GM 6.5. Lots of good soundproofing stuff out there where you cut the sound quite a bit. Dynamat is just one.
1997 Ford F250 Extended Cab, 7.3 Diesel, 8 foot bed.
Reese 16K Hitch
(Moved into Shed) Hensley Arrow
Jordan Brake Controller, Hensley TruControl Gold Shelved.
Open Range 5th Wheel, Roamer RF392 BHS
Just how noisy is a 98 Dodge Cummins 12 valve inside
Nothing high tec electronics won't fix. Turn up the tunes!
Beyond that is sounds like a machine that will last many years.
1990 37 ft King of the road 5th wheel. Great carpentry, summer home
1997 33 ft Holiday Rambler, Never again will a new RV come into this family
2003 25 ft Majestic M/H, Old RV rental Best travel machine we've ever owned.
A superb CC LB 4X4, GM HD Diesel, airbags, Rancho's, lots more
Lance Legend TC 11' 4", loaded including 3400 PP generator and my deluxe 2' X 7' rear porch
29 ft Carriage Carri-lite 5'er - a specially built gem
A like new '07 Sunline Solaris 26' TT