Reliability

General Motors

GM Ultium 10-module pack (85 kWh: Equinox EV, Blazer EV LT and RS, Honda Prologue)

NCMA (nickel-cobalt-manganese-aluminum) cells from Ultium Cells (GM / LG Energy Solution joint venture) · 85 kWh · used in 3 model variants.

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Pack reference

NCMA (nickel-cobalt-manganese-aluminum) · Ultium Cells (GM / LG Energy Solution joint venture) · 10 modules in a single layer, about 336 volts
About the pack
Capacity
85 kWh
as published
Fast charge
150 kW
peak
Warranty floor
—
see OEM warranty book

Pack overview

ChemistryNCMA (nickel-cobalt-manganese-aluminum)
Cell supplierUltium Cells (GM / LG Energy Solution joint venture)
Cell formatLarge-format pouch
Voltage (nominal)336 V
CoolingLiquid
Architecture10 modules in a single layer, about 336 volts
Warranty 8 yr / 100k mi

Known issues

High
NHTSA 24V-320 (May 2024) covers certain 2024 Cadillac Lyriq, Chevrolet Blazer EV, Chevrolet Silverado EV, GMC Hummer EV SUV and GMC Sierra EV vehicles. Wires in the rear drive unit's electric motors may be insufficiently insulated and can contact each other, causing a loss of drive power. Dealers replace the rear drive unit free of charge.
Medium
GM halted Blazer EV sales in December 2023 over software problems with the touchscreen and DC fast charging, and resumed sales in March 2024 after a software update.
Low
Chevrolet rates this pack at 85 kWh with DC fast charging at up to 150 kW, against 102 kWh and 190 kW for the Blazer EV's rear-drive and SS versions. Honda quotes 20 to 80 percent in 35 minutes for the Prologue.

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.

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

Pack family

GM Ultium 10-module pack (85 kWh: Equinox EV, Blazer EV LT and RS, Honda Prologue) is part of the gm-ultium family. Related packs:

Frequently Asked Questions

What chemistry is the GM Ultium 10-module pack (85 kWh: Equinox EV, Blazer EV LT and RS, Honda Prologue)?

The GM Ultium 10-module pack (85 kWh: Equinox EV, Blazer EV LT and RS, Honda Prologue) uses NCMA (nickel-cobalt-manganese-aluminum) chemistry. Cells are supplied by Ultium Cells (GM / LG Energy Solution joint venture). Cell format: Large-format pouch. Pack architecture: 10 modules in a single layer, about 336 volts.

What is the warranty on this pack?

8 years or 100,000 miles. 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 10-module pack (85 kWh: Equinox EV, Blazer EV LT and RS, Honda Prologue) battery warranty runs 8 years / 100,000 miles, 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 10-module pack (85 kWh: Equinox EV, Blazer EV LT and RS, Honda Prologue)?

Chevrolet Equinox 2024-2025 (Equinox EV (front- and all-wheel drive)); Chevrolet Blazer 2024-2025 (Blazer EV LT / RS (85 kWh)); Honda Prologue 2024-2025 (All trims).

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