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.
2005 Copper Canyon 293 FWSLS
2001 Dodge 2500 4X4, 5.9 Cummins 5 speed, 3.55 gears, Pacbrake, Power Puck, 258K
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
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