2026 Buick Enclave 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

11 Coolant / Antifreeze parts for the 2026 Buick Enclave 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 2 options from PRESTONE and VALVOLINE — 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, VALVOLINE, PRESTONE and ACDELCO supply 5 parts: built to original-equipment specification. A representative part number is ACDELCO 105027.

This table covers the hard pipes and extra hoses in the coolant circuit. Read more

4 Coolant Hose / Pipe parts for the 2026 Buick Enclave come from GM GENUINE.

This group includes GM GENUINE 42934281, GM GENUINE 26397989 and GM GENUINE 26595377 and the remaining parts above.

This table covers the overflow / expansion tanks that hold extra coolant. Read more

One part is listed for the 2026 Buick Enclave — GM GENUINE 26566817.

This table covers the caps on the overflow / expansion tank. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

One part is listed for the 2026 Buick Enclave — GATES 31569.

This table covers the Hose clamps. Read more

5 Hose Clamp parts for the 2026 Buick Enclave come from GM GENUINE. The "Popular" part is GM GENUINE 11570871.

This group includes GM GENUINE 11570871, GM GENUINE 90572594 and GM GENUINE 11548691 and the remaining parts above.

This table covers the intercoolers that cool turbo or supercharger charge air. Read more

This group shows a single part: GM GENUINE 12734630.

This table covers the Intercooler Air Hose pipes. Read more

This group shows a single part: GM GENUINE 12728636.

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

2 Radiator parts for the 2026 Buick Enclave come from GM GENUINE.

Listed part numbers: GM GENUINE 85742793 and GM GENUINE 26416907.

This table covers the caps that hold system pressure at the radiator or reservoir neck. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

This group shows a single part: ACDELCO RC124.

This table covers the petcocks used to drain the radiator. Read more

One part is listed for the 2026 Buick Enclave — GM GENUINE 23444086.

This table covers the seals at the Radiator. 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

One part is listed for the 2026 Buick Enclave — GM GENUINE 85055109.

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

5 Temperature Sender / Sensor parts for the 2026 Buick Enclave come from 2 brands — GM GENUINE and HOLSTEIN. The "Popular" part is GM GENUINE 55497116.

The Economy section: 2 options from HOLSTEIN. HOLSTEIN 2CTS0331 is listed in this group.

Standard Replacement: 2 parts, 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 GM GENUINE 55497116, HOLSTEIN 2CTS0331 and HOLSTEIN 2CTS0334, 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

This group shows a single part: GM GENUINE 12695721.

This table covers the pumps that circulate coolant through the block and radiator. Typical signs include coolant at the weep hole, pulley play, or a growl from the front of the engine. Replace the thermostat and refill with the specified coolant whenever the pump comes off. Read more

One part is listed for the 2026 Buick Enclave — GM GENUINE 12736214.