General Motors is trying to make its next electric vehicles cheaper and more efficient by taking material out rather than simply adding more battery. At its GM Forward event in New York, the automaker outlined a fourth-generation EV platform that it says can deliver equivalent or greater driving range with 20% less battery capacity while cutting vehicle wiring by 30%.
The gains are meant to come from the entire vehicle working as one system: lighter construction, better aerodynamics, new lithium manganese-rich batteries, simpler drive units and a centralized computer. GM says the result should be EVs that use energy more efficiently without asking buyers to accept shorter range. The numbers are ambitious, and some of the most important hardware will not reach volume production until later in the decade, but the strategy offers a clear look at how GM plans to attack EV cost and complexity.
The 20% Battery Cut Is Really a Whole-Vehicle Efficiency Story
GM is not claiming that a new battery chemistry alone creates the 20% reduction. The company says its fourth-generation EVs are being engineered to deliver roughly 20% more range from every kilowatt-hour of energy. It also expects the vehicles to be about 15% lighter and 25% more aerodynamically efficient than its current EVs. Those gains allow the battery pack to shrink while preserving, or potentially improving, usable range.
That matters because vehicle efficiency compounds. A smaller battery reduces mass, which can reduce the energy needed to move the vehicle. Lower energy demand can then allow smaller motors, lighter supporting structures and less cooling hardware. GM describes this as designing the vehicle as one system rather than optimizing components in isolation. The company has not yet published a production model, battery size or EPA range figure for the platform, so the percentages remain engineering targets rather than specifications attached to a showroom vehicle.
Using Less Battery Could Be the Biggest Cost Lever
The battery pack remains one of the most expensive systems in an electric vehicle, so needing less capacity can matter even when battery prices are falling. BloombergNEF reported that battery-electric-vehicle packs averaged $99 per kilowatt-hour globally in 2025, the second straight year below $100. North American pack prices remained materially higher than prices in China, underscoring why U.S. automakers are focused on reducing both cell cost and pack size.
GM’s engineers have framed the 20% reduction as a value play. Zach Walker, the company’s director of global EV architecture, said the goal is equivalent or greater range with substantially less battery capacity. That does not automatically mean a 20% cheaper vehicle; labor, electronics, structure, software and margins still matter. But fewer kilowatt-hours mean fewer costly battery materials and less mass to carry, giving GM more room to lower prices, improve margins or spend the savings elsewhere in the vehicle.
LMR Batteries Sit at the Center of the Plan
The fourth-generation platform is built around lithium manganese-rich, or LMR, prismatic cells developed with LG Energy Solution. GM says the chemistry can deliver about 33% more energy density than lithium iron phosphate, or LFP, cells at a comparable cost. The company has also said its LMR formulation uses far more manganese and much less nickel than today’s high-nickel cells, with virtually no cobalt in the cathode mix.
That combination is attractive because manganese is more abundant and generally less expensive than nickel or cobalt, while higher energy density can help keep a battery smaller for a given range. GM has researched manganese-rich cells since 2015 and plans to manufacture the new prismatic cells through its Ultium Cells joint venture in Spring Hill, Tennessee. The plant is being upgraded for LMR production, with the companies targeting 2028 for commercial-scale manufacturing in the United States, a crucial step toward putting the chemistry into mainstream vehicles.
The Chemistry Still Has to Prove Itself at Scale
LMR is promising precisely because it has historically been difficult to commercialize. Academic research on lithium-rich manganese cathodes has repeatedly identified voltage decay, capacity loss and cycle-life problems as barriers to long-term use. GM acknowledges that history. Its engineers say they have addressed the weaknesses through material coatings, dopants, particle engineering and manufacturing changes, allowing the new cells to match the life of current high-nickel designs.
The important distinction is that those claims have not yet been demonstrated across millions of customer vehicles. GM and LG Energy Solution still have to validate the chemistry, manufacture large prismatic cells consistently and prove durability through years of use. The company has invested heavily in that bridge from laboratory work to production, including a major battery development complex in Warren, Michigan. That physical validation matters because a chemistry that performs well in simulation or prototype batches can behave differently when production reaches automotive scale.
Thirty Percent Less Wiring Comes From Centralized Computing
The wiring reduction is tied to a major change in how GM organizes vehicle electronics. Instead of relying on many scattered electronic control modules connected through point-to-point wiring, the new architecture moves more decision-making into a central computer supported by simpler local aggregators. GM says the fourth-generation EV system uses 30% less wiring than its current EVs while providing about 40 times more processing power.
Cutting wiring can reduce mass, assembly complexity and the number of connections engineers must package around the cabin, battery and chassis. More important, centralized computing gives software a common foundation for functions that previously lived in separate modules. GM says that should make over-the-air updates, energy management, displays, voice controls and advanced driver-assistance features easier to improve. The architecture is broader than EVs: GM plans to use it in gasoline-powered trucks and SUVs too, beginning with the Cadillac Escalade IQ in 2028 before expanding through more of its lineup.
GM Is Also Removing Parts From Motors and Battery Packs
The simplification effort continues beyond the wiring harness. GM says a new family of electric motors and power electronics cuts the number of parts inside each drive unit by 40%. Smaller, lighter drive units can reduce production complexity while freeing space for passengers or cargo. They also support the broader efficiency cycle: every component removed is mass that no longer has to be accelerated, stopped and carried for the life of the vehicle.
The battery is also being simplified through larger prismatic cells. GM has previously said the prismatic format can reduce battery-module components by 75% and total pack components by 50% compared with its current approach. Larger rectangular cells pack tightly and require fewer connectors and structural pieces. GM has not disclosed the final module layout for the fourth-generation platform, but it has said the cells will be structurally integrated, potentially helping create a lighter package while giving designers more freedom over floor height and interior space.
GM Simulated 300,000 Battery Designs Before Building One
A striking part of GM’s pitch is how much development is moving into simulation. The company says it evaluated more than 300,000 LMR battery designs before building a single physical cell, consuming about 300 million CPU hours. GM says the battery team moved from its first pack concept to formal program approval in roughly one month, a timeline that would have been difficult under a traditional test-build-repeat process.
The same approach is being applied across vehicle design, engineering and manufacturing. GM wants teams to work concurrently instead of passing a vehicle from one department to the next like a relay baton. The company believes this could cut a conventional four- or five-year vehicle program to roughly two years. Simulation can eliminate bad ideas earlier and let engineers test many more possibilities, but it does not replace physical validation. Crash performance, battery aging, thermal behavior, corrosion, software robustness and manufacturing variation still have to be proven in the real world before customers see the benefits.
The Factory Is Part of the Efficiency Push Too
GM is also trying to remove time and rework from the factory. Its PlantBrAIn manufacturing platform combines plant-floor data with digital models so teams can test assembly steps, equipment placement and ergonomic issues before hardware is installed. GM says the approach has already helped battery packs move through its assembly process about 30% faster, and similar tools are being used across stamping, casting, welding, painting and final assembly.
The fourth-generation EVs are also supposed to help verify their own construction. Because the new computing and electrical architecture can monitor connections during assembly, GM says a vehicle will be able to test electrical connections as it moves down the line instead of waiting for a final validation step. That reflects the larger philosophy behind the platform: fewer parts, fewer handoffs and earlier detection of problems. If the system works as intended, savings should come from manufacturing as well as from the battery itself, potentially improving quality while reducing time spent on end-of-line checks.
The Biggest Unknown Is When Buyers Will Actually See It
GM has described the fourth-generation platform in unusually concrete engineering terms, but it has not named the first production vehicle, published a price or committed to a firm on-sale date. President Mark Reuss said the architecture will serve multiple segments and arrive “very shortly,” while company representatives have pointed to high-volume crossover categories as an important target. That leaves a gap between the technical preview and a vehicle buyers can evaluate.
The battery timeline provides one useful anchor. GM and LG Energy Solution have targeted 2028 for commercial production of LMR prismatic cells in the United States, and GM’s next centralized computing architecture is also scheduled to debut in 2028 on the Escalade IQ. Until the company identifies a fourth-generation EV, the 20% battery and 30% wiring figures should be treated as platform targets, not guaranteed specifications for a particular model. The real test is whether those savings show up in price, range, weight, reliability and ownership costs once production vehicles arrive.
