21 Cooling system parts are listed for the 2025 GMC Hummer Ev Pickup, in 7 part types, covering the ELECTRIC engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2025 GMC Hummer Ev Pickup, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. Most of the listed parts are Coolant / Antifreeze (9 parts), Temperature Sender / Sensor (5 parts) and Thermostat / Thermostat Housing / Water Outlet Seal (3 parts). The other 4 part types cover the remaining 4 parts.
The 2025 GMC Hummer Ev Pickup came with a single engine, the ELECTRIC, and every part is verified against it.
6 brands supply cooling system parts for the 2025 GMC Hummer Ev Pickup, led by GM GENUINE (8 parts), PRESTONE (7 parts) and HOLSTEIN (2 parts), plus 3 more brands. Quality grades include Standard Replacement, Economy and Premium.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2025 GMC Hummer Ev Pickup. 3 parts have it, including PRESTONE AF2100 (Coolant / Antifreeze) and GM GENUINE 55497116 (Temperature Sender / Sensor). Each part number opens a page with every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | AF3055 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | AF3100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Prime Yellow - All VehiclesExtended Life | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | AFC12100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Command Nitrite Free Extended Life CoolantYellow Nitrite Free OAT | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular | AF2100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | All Vehicles10yr/300k mi | View on Amazon |
| PRESTONE | AFMAX | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular | ZXEL1 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Dex-Cool Orange1 Gallon | View on Amazon |
| ACDELCO | 105027 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | DEX-Cool Extended LifeDexcool (with DE-Ionized Water) (with Bitterant) 1 Gallon | View on Amazon |
| PRESTONE | AF3400 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Prime OrangeOrange Compatible | View on Amazon |
| PRESTONE | AF850 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | DEX-Cool Extended Life1 Gallon | View on Amazon |
This table covers the engine coolants and antifreeze formulations specified for this cooling system. Typical signs include a rising temperature gauge, rusty or sludged coolant, or a heater that blows cold. Use the chemistry named in the notes. Mixing silicate, OAT and HOAT formulas can gel in the radiator.
9 Coolant / Antifreeze parts are listed for the 2025 GMC Hummer Ev Pickup, from PRESTONE, VALVOLINE and ACDELCO. PRESTONE AF2100 carries the "Popular" badge.
The Compatible With All Colors section lists 1 option from PRESTONE — grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. PRESTONE AF3055 is listed in this group.
In the Economy grade, PRESTONE supplies 1 part: the catalog's value-priced group. A representative part number is PRESTONE AF3100.
The Heavy Duty section lists 1 option from PRESTONE — rated for severe service. PRESTONE AFC12100 is listed in this group.
The Premium section lists 2 options from PRESTONE — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.
The Standard Replacement section lists 4 options from PRESTONE, VALVOLINE and ACDELCO — built to original-equipment specification. VALVOLINE ZXEL1 is listed in this group.
Part numbers include PRESTONE AF2100, PRESTONE AF3055 and PRESTONE AF3100, among others listed above.
Coolant Hose Retainer / Clip
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 11547355 | 🇺🇸 US 🇨🇦 CA | OutletFITS 25-31MM TUBE | View on Amazon |
This table covers the Coolant Hose retainers and clips.
One part is listed for the 2025 GMC Hummer Ev Pickup — GM GENUINE 11547355.
Radiator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 85851198 | 🇺🇸 US 🇨🇦 CA | Aluminum Core / Aluminum Tank | View on Amazon |
This table covers the radiators that dump engine heat to airflow through the core. Typical signs include overheating in traffic, a wet core, or coolant that disappears with no puddle. Replace the cap if it cannot hold the rated pressure, and bleed the system after the swap.
One part is listed for the 2025 GMC Hummer Ev Pickup — GM GENUINE 85851198.
Radiator Fan Assembly
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 86599465 | 🇺🇸 US 🇨🇦 CA | Electrical Or Mechanical: Electrical | View on Amazon |
This table covers the fan assemblies (and clutches, where listed) that pull air through the radiator.
This group shows a single part: GM GENUINE 86599465.
Radiator Insulator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 52493483 | 🇺🇸 US 🇨🇦 CA | Lower | View on Amazon |
This table covers the Radiator insulators.
This group shows a single part: GM GENUINE 52493483.
Temperature Sender / Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN | 2CTS0330 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without SEALwithout GASKET | View on Amazon |
| HOLSTEIN | 2CTS0334 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | without Sealwith Gasket | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Popular | 55497116 | 🇺🇸 US 🇨🇦 CA | Includes Gasket | View on Amazon |
| WELLS | 5S17529 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Screw-In TypeDrive Motor Battery Pack | View on Amazon |
| WELLS | 5S17528 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Push-In TypeDrive Motor Battery Pack | View on Amazon |
This table covers the senders that report coolant temperature to the gauge or ECU. Typical signs include a gauge that sits on empty or overheat, or a lamp that does not match what the engine is doing. Rule out the cluster and the wiring before replacing the sender.
5 Temperature Sender / Sensor parts are listed for the 2025 GMC Hummer Ev Pickup, from HOLSTEIN, WELLS and GM GENUINE. GM GENUINE 55497116 carries the "Popular" badge.
Economy: 2 parts, from HOLSTEIN. A representative part number is HOLSTEIN 2CTS0330.
The Standard Replacement section: 3 options from WELLS and GM GENUINE. GM GENUINE 55497116 is listed in this group.
Listed part numbers: GM GENUINE 55497116, HOLSTEIN 2CTS0330 and HOLSTEIN 2CTS0334, plus the other parts above.
Thermostat / Thermostat Housing / Water Outlet Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 86824678 | 🇺🇸 US 🇨🇦 CA | 22MM Inside DiameterThermostat Seal | View on Amazon |
| GM GENUINE | 86824679 | 🇺🇸 US 🇨🇦 CA | 17MM IDThermostat Seal | View on Amazon |
| GM GENUINE | 86824683 | 🇺🇸 US 🇨🇦 CA | Service O Ring 26MM IDThermostat Seal | View on Amazon |
This table covers the seals at the thermostat housing and water outlet. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
GM GENUINE supplies the 3 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2025 GMC Hummer Ev Pickup.
This group includes GM GENUINE 86824678, GM GENUINE 86824679 and GM GENUINE 86824683.
Buying Cooling System Parts for a 2025 GMC Hummer Ev Pickup
On this vehicle, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.
- Confirm you have the ELECTRIC engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Coolant / Antifreeze and Temperature Sender / Sensor .
Frequently Asked Questions
How many cooling system parts fit the 2025 GMC Hummer Ev Pickup?
Our catalog currently lists 21 cooling system parts for the 2025 GMC Hummer Ev Pickup across 7 subcategories and 6 brands, covering the ELECTRIC engine. Each part is matched to the engine(s) it fits.
What are the signs of cooling system problems on a 2025 GMC Hummer Ev Pickup?
Common symptoms include a rising temperature gauge in traffic, sweet-smelling steam, crusty deposits around hose clamps, or a heater that blows cold. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2025 GMC Hummer Ev Pickup was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2025 GMC Hummer Ev Pickup?
Every part on this page is matched to the ELECTRIC engine. Then replace coolant with the exact specification the manufacturer calls for — mixing chemistries can gel and block small passages. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2025 GMC Hummer Ev Pickup
Cooling System Parts for Other GMC Hummer Ev Pickup Years
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