Stellantis Belvidere Assembly Plant Retooling

Belvidere Assembly has been dark since February 2023. On August 14, Stellantis raised its commitment to the plant past $800 million, up from the $600 million pledged in October 2025, and named what will be built there: the next-generation Jeep Cherokee, and the first U.S.-built vehicle on the STLA One platform.

Project Scope

The plant opened in 1965 and last built the Cherokee KL in 2023. Reopening it was a core term of the 2023 UAW contract settlement, which makes the retooling as much a labor commitment as a capital one. Stellantis disclosed that more than $60 million had already gone into the site through July 2026 on upgrades and condition assessments across the stamping, body, paint and general assembly shops.

STLA One is a modular architecture Stellantis says will underpin more than 30 models globally by 2035, and that’s what drives the scope. A platform change means new body shop tooling, new welding and joining lines, and paint and general assembly modifications sized for a vehicle the building has never produced. Retooling construction is expected to start before the end of 2026. Jeep Compass assembly is also planned for the site.

The timeline moved in the same announcement. Pilot production of the Cherokee now begins in the first half of 2028, with retail production launching in the second half of 2029. Neither a general contractor nor an architect has been named publicly.

Why It Matters

The dollar figure went up and the schedule went out. That combination is the interesting part, because it says the constraint at Belvidere isn’t money.

Two things plausibly explain it. STLA One is a new platform, and first-application plants absorb engineering changes that arrive after tooling is ordered. And a plant idle for three years accumulates condition problems that only surface once crews open up the mechanical systems. The $60 million already spent on upgrades and condition assessments is the tell.

For contractors in the automotive retooling market, Belvidere is a useful data point on what a three-year idle actually costs to reverse. The industry has several more of these coming as the EV transition reshuffles which plants build what, and the assumption that a mothballed plant restarts on a two-year clock keeps meeting reality.

Project Team & Details