GM's Fourth-Gen EV Platform Cuts Wiring 30% And Battery Size 20%

General Motors used its GM Forward event in New York this week to pull the cover back on a fourth-generation electric vehicle architecture, and the headline numbers are about doing more with less. The company says the new platform slashes battery capacity needs by 20% while still matching today’s range, trims vehicle mass by 15%, and boosts overall efficiency by a fifth.

Company president Mark Reuss told the room the hardware will appear on “a remarkable set of vehicles in several segments” and that a launch is coming “very shortly.” GM declined to name which models get it first or pin down a date. A spokesperson did confirm the platform targets the brand’s highest-volume segments — meaning crossover SUVs.

The chemistry doing the heavy lifting

At the center of the redesign sits a lithium-manganese-rich (LMR) cell, a chemistry GM bills as cheaper than high-nickel packs and 33% more energy-dense than LFP. The prismatic cells are structurally integrated into the vehicle, and GM says the layout opens the door to lower, sleeker bodywork without sacrificing usable cabin space.

Key Specs: 20% less battery capacity · 15% lighter vehicles · 20% greater efficiency · 25% better aero · 40% fewer motor parts

Zach Walker, GM’s director of global EV architecture, framed the battery savings as the whole ballgame: shaving a fifth off the priciest line item in the bill of materials is where the value proposition to buyers actually gets made.

Fewer boxes, one brain

The electrical side gets an equally aggressive rethink. GM is dropping dozens of separate electronic control modules in favor of a single Central Compute Unit mounted near the front of the car, handling perception, propulsion, safety and chassis duties together. The payoff, per GM:

• 30% less wiring than current EVs, which trims both complexity and weight
• 40x the processing power of today’s setups
• 50% faster cellular connectivity for streaming and connected features

The setup arrives first on the 2028 Cadillac Escalade IQ, where it will also enable GM’s first eyes-off driver-assistance system. From there it spreads across the fourth-gen EVs and, notably, the company’s combustion lineup as well — starting with pickups and three-row SUVs.

The competitive picture

GM isn’t alone in tearing up the blueprint. Ford is readying its own clean-sheet EV platform, with the roughly $30,000 Fathom pickup set to lead the charge late next year. GM’s messaging is also a hedge of sorts: Reuss noted that EV demand is climbing globally and that when the U.S. market swings toward electric in volume, the automaker intends to be ready. No solid dates, no confirmed nameplates. But the efficiency math hints at where the next round of price cuts could come from.