General Motors has set up a US$4.5bn facility with third-party inventory manager Procura Auto Parts to guarantee a supply of the components it considers critical, according to a securities filing made public on 11 August. Procura will purchase parts inventory directly from GM’s key suppliers and hold the stock until GM needs it, shifting the cost of maintaining that buffer off GM’s own balance sheet in the meantime.

Under the arrangement, GM pays Procura interest and fees upfront and only pays for the physical parts once it actually draws on them. Neither company will physically hold the stored inventory, which will remain with the suppliers until needed. Procura is in turn funded by a bank syndicate led by JPMorgan Chase and Banco Santander, backed by GM’s own payment guarantees. GM will pay 1.55% annual interest on top of the Secured Overnight Financing Rate, which currently sits around 3.6%, plus a 0.25% annual fee on the unutilised portion of the facility. The term is currently set to last for three years.

GM has not disclosed which specific parts the deal actually covers, leaving the real scope of the arrangement unclear. Given the company’s own history, the most likely candidates are semiconductors and rare-earth materials, both of which have previously forced GM to idle North American assembly plants. However, the filing frames the coverage broadly enough to suggest that other, less sensitive, component categories could also qualify.

Chief Executive Mary Barra has framed the deal as part of a wider effort to rebuild GM’s approach to supply chain risk. It comes on the heels of a series of disruptions that the company describes as recurring rather than exceptional. “Our industry has experienced significant supply chain disruptions in the past for various reasons, and it is safe to assume they will happen in the future,” GM said in its filing. “This program will help ensure that we are prepared for multiple scenarios.”

That disruption may occur again in the future seems to be a safe bet. At the time of writing, trade in the Strait of Hormuz remains disrupted, and even if hostilities were to immediately subside fuel prices will remain elevated for at least the next couple of years. High-margin demand for semiconductors from AI data centres is also causing chipmakers and foundries to reallocate their manufacturing capacity, leading to tighter allocation and higher costs for automakers. Persistent trade tensions, primarily between the US and China—but also between the US and other countries—could also affect supply chains, particularly for electric vehicles and the raw materials used in their production, 

Battery cathodes,  account for more than half the cost of a finished EV cell, and roughly 80% of the raw materials used in them still undergo chemical refining in China regardless of where the underlying ore was mined, meaning even automakers with their own lithium contracts remain exposed to a single processing chokepoint. 

Semiconductor fabrication, meanwhile, largely remains concentrated in a small number of East Asian foundries—hina, Taiwan, Japan or Korea—and automakers often lack visibility into the obscure sub-tier suppliers, of rubber compounds, rare-earth magnets, custom sensors, that a Tier-1 vendor may quietly depend on for a single irreplaceable part.

The Procura deal sits inside a considerably larger shift in GM’s procurement philosophy, moving away from the lean, just-in-time inventory model that left assembly lines exposed to a single missing component during the pandemic-era chip shortage, toward a more deliberately stocked, “just-in-case” approach. GM is reportedly spending in the region of US$10bn to US$12bn annually across nearshoring, direct semiconductor agreements such as its memory supply partnership with Micron Technology, and vertical integration efforts including its Ultium Cells battery joint ventures with LG Energy Solution and Samsung SDI.