Heavy trucks you all have. My 2000 C2500 wieghs 4800 off the line. Altho arou d 5300 with spray in line-x liner, a mesh walled ladder pipe rack...
I have three chargeable options. Auto trans tow pkg, hitch only at the time, trim rings.
Two others on here had 05 GM dually diesel crew cabs. One sighed 7200, a stripped rwd. My LS 4x was 7300, bertp, have not seen him post in awhile, his was a leather interior, it was somewhere north of 7700 sitting there empty.
So yes, it is possible for some rigs to have upwards of 500-700+ lbs difference between a very stripped model, and a full leather pkg with a diesel motor.
I've seen some red reg cab 1500s listed with 4800-5000 lb empty wts like my C2500. Crew cabs pushing 6000 lb full leather, power seats etc.
Marty