General Motors

GM Ultium NCMA (Dual-Tier Truck, ~205 kWh)

NCMA (nickel-cobalt-manganese-aluminum) cells from Ultium Cells LLC (LG-GM JV, Lordstown OH and Spring Hill TN) · 212 kWh total (205 kWh usable) · used in 3 model variants.

GM Ultium NCMA (Dual-Tier Truck, ~205 kWh)

NCMA (nickel-cobalt-manganese-aluminum) · Ultium Cells LLC (LG-GM JV, Lordstown OH and Spring Hill TN) · Dual-tier 24-module configuration (two stacked module rows), 800V architecture, liquid-cooled

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About the pack

Capacity

205 kWh

useable · 212 total

Fast charge

350 kW

peak · 30 min 10→80%

Warranty floor

70%

capacity floor at 8 yr / 100k mi

Pack overview

ChemistryNCMA (nickel-cobalt-manganese-aluminum)

Cell supplierUltium Cells LLC (LG-GM JV, Lordstown OH and Spring Hill TN)

Cell formatLarge-format pouch

Voltage (nominal)800 V

CoolingLiquid (glycol)

ArchitectureDual-tier 24-module configuration (two stacked module rows), 800V architecture, liquid-cooled

Warranty8 yr / 100k mi

Capacity floor70%

Known issues

Low

The dual-tier truck pack stacks two module rows to deliver 200+ kWh; mass approaches 2,900 lb. Tire wear on Hummer EV is meaningfully faster than ICE pickups, and chassis-component replacement intervals are still being established.

Low

Wireless BMS architecture is novel; early 2022 Hummer EV had software bugs around state-of-charge reporting and 800V handshake on certain DC fast-chargers, both addressed via OTA updates.

High

Silverado EV and Sierra EV early Work Truck builds shipped with range-prediction firmware that overstated remaining range under sustained tow load; GM issued NHTSA campaigns 23V-839 and follow-ups to recalibrate.

Low

Cold-weather range loss is consistent with NCMA chemistry but exaggerated by truck aero (~30-35% reduction at 20°F); cabin pre-conditioning while plugged in helps materially.

Low

Single-tier sister pack (Lyriq class) and small/mid pack (Equinox EV / Blazer EV / Honda Prologue / Acura ZDX) cover the rest of the Ultium portfolio.

How this pack ages (industry context)

Industry fleet aggregates: 2.3% average annual capacity loss across 22,700 EVs / 21 models (Geotab, 2026), and 95% range retention at 5 years on average across 30,000+ vehicles (Recurrent, 2026).

OEM warranty floor on this pack: 8 yr / 100k mi to 70% capacity.

Public per-pack degradation curves are not available for most models. Individual results vary materially with climate, charging behavior, and DC fast-charge frequency.

Vehicles using this pack

GMC Hummer EV

2022-2025 · Pickup 2X / 3X / Edition 1 (212 kWh nominal, dual-tier)

318 miEPA range

53MPGe

Full reliability page →

Chevrolet Silverado 1500

2019-2025 · Silverado EV trim only (Work Truck / RST, ~170-205 kWh dual-tier)

Full reliability page →

GMC Sierra 1500

2019-2025 · Sierra EV trim only (Denali / Elevation / AT4, ~170-205 kWh dual-tier)

Full reliability page →

Battery-Related NHTSA Recalls

Recalls affecting battery, charging, electric propulsion, or thermal-event systems on vehicles using this pack. Recalls are deduplicated across model variants; affected vehicles are listed for each campaign.

20V650000 22/10/2020 POWER TRAIN:DRIVELINE:DRIVESHAFT

General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500 and 2020 Chevrolet Silverado 2500 trucks. One of the driveshaft joints may not have been properly welded, causing the driveshaft to separate while the vehicle is moving.

Consequence: If the driveshaft separates, there may be a loss of propulsion, increasing the risk of crash.

Affects: Chevrolet Silverado 1500 2019-2025; GMC Sierra 1500 2019-2025

For TWD editorial coverage of major recall campaigns, see /recalls/.

Pack family

GM Ultium NCMA (Dual-Tier Truck, ~205 kWh) is part of the gm-ultium family. Related packs:

GM Ultium NCMA (Single-Tier, Lyriq class) · NCMA (nickel-cobalt-manganese-aluminum) · 102 kWh
GM Ultium NCMA (Small/Mid Pack, ~85-102 kWh) · NCMA (nickel-cobalt-manganese-aluminum) · 85 kWh

Frequently Asked Questions

What chemistry is the GM Ultium NCMA (Dual-Tier Truck, ~205 kWh)?

The GM Ultium NCMA (Dual-Tier Truck, ~205 kWh) uses NCMA (nickel-cobalt-manganese-aluminum) cells supplied by Ultium Cells LLC (LG-GM JV, Lordstown OH and Spring Hill TN). Cell format: Large-format pouch. Pack architecture: Dual-tier 24-module configuration (two stacked module rows), 800V architecture, liquid-cooled.

What is the warranty on this pack?

8 years or 100,000 miles, with capacity coverage to 70% of original. Specific terms vary by year and trim; check the manufacturer's warranty booklet for the exact vehicle.

How much does this pack degrade over time?

Industry-wide fleet aggregates show roughly 2.3% average annual capacity loss across 22,700 EVs (Geotab, 2026), with about 95% range retention at five years on average across Recurrent's 30,000+ vehicle fleet (2026). Public per-pack degradation curves are not available for most models. The GM Ultium NCMA (Dual-Tier Truck, ~205 kWh) battery warranty runs 8 years / 100,000 miles to a 70% capacity floor, which is the OEM-guaranteed minimum within that period. Individual results vary with climate, charging habits, and DC fast-charging frequency.

Which vehicles use the GM Ultium NCMA (Dual-Tier Truck, ~205 kWh)?

GMC Hummer EV 2022-2025 (Pickup 2X / 3X / Edition 1 (212 kWh nominal, dual-tier)); Chevrolet Silverado 1500 2019-2025 (Silverado EV trim only (Work Truck / RST, ~170-205 kWh dual-tier)); GMC Sierra 1500 2019-2025 (Sierra EV trim only (Denali / Elevation / AT4, ~170-205 kWh dual-tier)).