Pickup Treaty

2009 Cadillac DTS

R131

Media library

9 photos

Original Build Studies

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Original Build Studies ↗

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Original Build Studies ↗

Ladies of WBS Gallery

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Ladies of WBS ↗

Wave Photography

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Wave Photography ↗

Blueprint Studies

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Blueprint Studies ↗

Story

Pickup Treaty starts with a car nobody expects to see with a bed: the 2009 Cadillac DTS, all long-hood comfort and quiet authority. The roof is cut at the B‑pillar and the rear structure is rebuilt into a clean, open cargo box, keeping the Cadillac surfacing language intact instead of turning it into a novelty. From the driveway it reads like an OEM “what if” that never made it past a design studio—until you notice the stance and the track.

The widebody is the whole story: a restrained +280 mm up front and a serious +600 mm out back, so the proportions land like a luxury tow rig rather than a cartoon. A 1970s-style hood bulge and a louvered dorsal intake give it a classic Cadillac cue without going full hot-rod, while the tailgate and bed details stay crisp, flush, and lit like a modern coachbuild.

Blueprint

The Whitepaper Room

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Collectible Poster

Collector's Edition

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Technical dossier

Fictional engineering concept

Platform

2009 Cadillac DTS

Powertrain concept

Northstar V8 retained with refreshed cooling system, updated gaskets, and conservative tune for reliability
Cold-air routing optimized to the hood scoop with sealed ducting and serviceable filtration
Exhaust reworked for a deeper, restrained tone—quiet cruise, present at throttle

Aero package

Extended hood with 1970s-inspired center bulge for visual length and underhood clearance
Integrated dorsal cold-air intake scoop with chrome louver detailing
Smoothed widebody integration with factory-style wheel-arch radii and minimal add-on edges

Chassis & stance

2009 Cadillac DTS

Wheels & tires

Rear: 21x12 aluminum 8-lug wheels with Michelin LTX truck tires (load-rated sidewall priority)
Front: 21-inch matching design sized to clear brakes and maintain Cadillac fender line
Rear track widened ~600 mm with bedside arch coverage to keep the tire face tucked and clean

Fabrication notes

B‑pillar and rocker reinforcements boxed and gusseted to recover torsional rigidity after roof removal
Bed structure mounted with isolators and hard points to prevent crack propagation and panel buzz
Rear suspension conversion engineered with proper shackle geometry and bump-stop travel for payload
Widebody steelwork finished to OEM gaps and shut lines before paint, not buried in filler