2026 GMC Hummer Ev Pickup Cooling System Parts

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. Read more

9 Coolant / Antifreeze parts for the 2026 GMC Hummer Ev Pickup come from 3 brands — PRESTONE, VALVOLINE and ACDELCO. The "Popular" part is PRESTONE AF2100.

In the Compatible With All Colors grade, PRESTONE supplies 1 part: grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. A representative part number is PRESTONE AF3055.

The Economy section lists 1 option from PRESTONE — the catalog's value-priced group. PRESTONE AF3100 is listed in this group.

In the Heavy Duty grade, PRESTONE supplies 1 part: rated for severe service. A representative part number is PRESTONE AFC12100.

In the Premium grade, PRESTONE supplies 2 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is PRESTONE AF2100.

In the Standard Replacement grade, PRESTONE, VALVOLINE and ACDELCO supply 4 parts: built to original-equipment specification. A representative part number is VALVOLINE ZXEL1.

Listed part numbers: PRESTONE AF2100, PRESTONE AF3055 and PRESTONE AF3100, plus the other parts above.

This table covers the Coolant Hose retainers and clips. Read more

This group shows a single part: GM GENUINE 11547355.

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. Read more

This group shows a single part: GM GENUINE 85851198.

This table covers the fan assemblies (and clutches, where listed) that pull air through the radiator. Read more

One part is listed for the 2026 GMC Hummer Ev Pickup — GM GENUINE 86599465.

This table covers the Radiator insulators. Read more

One part is listed for the 2026 GMC Hummer Ev Pickup — GM GENUINE 52493483.

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. Read more

4 Temperature Sender / Sensor parts for the 2026 GMC Hummer Ev Pickup come from 2 brands — HOLSTEIN and GM GENUINE.

The Economy section: 2 options from HOLSTEIN. HOLSTEIN 2CTS0330 is listed in this group.

Standard Replacement: 1 part, from GM GENUINE. A representative part number is GM GENUINE 55497116.

1 further part sits outside the graded sections, with the same engine-level match.

Part numbers include HOLSTEIN 2CTS0330, HOLSTEIN 2CTS0334 and GM GENUINE 55497116, among others listed above.

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. Read more

3 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2026 GMC Hummer Ev Pickup come from GM GENUINE.

Listed part numbers: GM GENUINE 86824678, GM GENUINE 86824679 and GM GENUINE 86824683.