GM will idle Detroit's Factory Zero through April 13 and temporarily lay off 1,300 workers, extending a production halt that began March 16 as the automaker walks EV output back against softening demand.

The downtime, first reported by Reuters, marks the second production pullback at the all-electric plant this year. GM had already trimmed Factory Zero output by roughly 50% in January before the latest extension landed, with the cuts stacking as U.S. battery-electric inventory lengthens and as federal regulatory changes reshape the segment.

What does Factory Zero build?

The Detroit facility assembles the Chevrolet Silverado EV pickup and the GMC Hummer EV, both nameplates exposed to a softer U.S. market. A GM spokesperson told Reuters: "Factory Zero will temporarily adjust production to align EV production with market demand."

That phrasing keeps the action inside an inventory-management frame rather than a structural retreat from the plant's role as GM's dedicated EV assembly site. It signals GM is reading dealer days-supply on both programs as elevated and is willing to absorb short-term labor disruption to bring output back in line.

What is the financial scale of the EV reset?

GM has now booked $7.6 billion in cumulative writedowns against its electric-vehicle portfolio, disclosed in stages as the company recalibrates capital spending on slower-selling nameplates. The Factory Zero extension sits inside that financial context, alongside federal regulatory changes that have reset the cost calculus across U.S. battery-EV programs.

The combined signal — falling volume alongside rising writedowns — has pulled EV-related capex at GM into sharper focus. Several peers have charted similar pullbacks over the last two quarters, leaving Factory Zero as the most visible single-plant expression of that reset.

Where is GM adding capacity?

While Factory Zero sits dark, GM is bolting a sixth production day onto Flint Assembly in Michigan to absorb demand for Chevrolet Silverado HD and GMC Sierra HD pickups. Flint runs the heavy-duty light-truck lineup on traditional internal-combustion architecture and has ranked among GM's most capacity-constrained plants.

The split — pulling EV volume while pushing ICE truck output — captures the bifurcated U.S. auto market. Heavy-duty pickups remain supply-rationed; BEV inventory has lengthened relative to sell-through. For GM, keeping Flint at full stretch now matters more for near-term operating leverage than any single electric-vehicle program on its books.

What to watch next

• April 13: the restart date GM has set for Factory Zero. A further extension would signal demand weakness stretching into late Q2.
• Flint Assembly: whether the added production day converts to a permanent sixth-shift posture or rolls back if heavy-duty order banks thin.
• Federal ZEV and emissions policy: any rollback of EV-related rules could reopen the math behind GM's $7.6 billion in cumulative EV writedowns.
• First-quarter U.S. EV deliveries: when manufacturers report volume, the data will show whether the Factory Zero cut is calibrated correctly or trailing demand by several months.
• Dealer days-supply for Silverado EV and Hummer EV, the leading indicator GM appears to be using to size its next restart call.