CamperHardlyKnowHer

Monaco Diplomat 38PDD

Class Abuilt 2005–05Mixed build tierScarce on the used market
WHAT ONE COSTS
—price not published

The maker never published an MSRP for this floorplan. Unknown is not cheap — treat any asking price against comparable models, not against zero.

THE SPECS
Length39.3 ft
Height (incl. A/C)12.3 ft
Width8.4 ft
Interior height6.8 ft
GVWR33,000 lb
Dry weightnot published
Sleeps4
Fresh water100 gal
Grey water62 gal
Black water40 gal
Fuel100 gal
Engine / chassisCummins ISL 400 hp 8.9L / Roadmaster RR8R, Allison 3000 MH 6-speed
GeneratorOnan 8.0 kW Quiet Diesel

A missing row means the maker never published that figure — unknown, not zero.

WHERE PEOPLE SLEEP
  • 1× Master queen bed with solid-surface nightstands(Permanent)60×80
  • 1× Roadside Easy Bed sofa(Convertible)—
HOW IT'S BUILT — 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Monaco (Mixed tier): Monaco Coach Corp (2005-2009), Navistar RV (2010-2013), REV Recreation Group (2014-2017)

YEAR BY YEAR — WHAT CHANGED
  • 2005Introduced
FINDING ONE

Scarce — months of watching; be ready to fly and drive it home. Why: only one model year; 21 years out of production. Estimated from build volume and production span — not a count of live listings.

THE READ

Double-slide 39-footer with a recliner in place of the second sofa; 242 in wheelbase.

OTHER DIPLOMAT FLOORPLANS
36SKT · 33,000 lb · sleeps 438PDQ · 33,000 lb · sleeps 640DST · 33,000 lb · sleeps 440PAQ · 33,000 lb · sleeps 440PDQ · 36,000 lb · sleeps 840PRQ · 33,000 lb · sleeps 641PDQ · 36,000 lb · sleeps 841SKQ · 36,000 lb · sleeps 843D · 44,600 lb · sleeps 643DF · 44,600 lb · sleeps 843DFT · 43,000 lb · sleeps 843G · 44,600 lb · sleeps 643P · 44,600 lb · sleeps 643PDQ · 43,000 lb · sleeps 8the whole line →
Is the 38PDD your #1 — or just a spec sheet?

These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about — set your priorities as sliders and watch the whole market re-rank around them. Nothing gets hidden, everything gets explained.

Rank it against your setup →

Data compiled from manufacturer spec sheets, retrieved 2026-07.