2018 GMC Acadia 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

17 Coolant / Antifreeze parts are listed for the 2018 GMC Acadia, from PRESTONE, PEAK, VALVOLINE and 3 other brands. FVP MV5050GAL 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, FVP, PEAK, PRESTONE and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is FVP MV5050GAL.

The Heavy Duty section lists 1 option from PRESTONE — rated for severe service. PRESTONE AFC12100 is listed in this group.

The Premium section lists 4 options from PRESTONE and PEAK — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.

The Standard Replacement section lists 7 options from VALVOLINE, PRESTONE, ACDELCO and 2 other brands — built to original-equipment specification. ACDELCO 105027 is listed in this group.

This table covers the Coolant Air Bleed Hose pipes. Read more

GM GENUINE supplies both parts for the 2018 GMC Acadia.

Part numbers include GM GENUINE 12653191 and GM GENUINE 12717142.

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

4 Coolant Hose / Pipe parts are listed for the 2018 GMC Acadia, from GATES and GM GENUINE.

This group includes GATES 51861, GATES 51474 and GM GENUINE 23253745 and the remaining parts above.

This table covers the Coolant Hose Connector flanges. Read more

One part is listed for the 2018 GMC Acadia — GM GENUINE 23333192.

This table covers the seals at the Coolant Hose Connector / Flange. 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: ELRING 237180.

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

One part is listed for the 2018 GMC Acadia — GM GENUINE 15041309.

This table covers the gaskets that seal the Coolant Pipe. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

This group shows a single part: ELRING 237170.

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

5 Coolant Reservoir parts for the 2018 GMC Acadia come from 5 brands — DORMAN, GM GENUINE, GPD and 2 other brands. The "Popular" part is DORMAN 603861.

Listed part numbers: DORMAN 603861, GM GENUINE 23386455 and GPD 2411160, plus the other parts above.

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

6 Coolant Reservoir Cap parts for the 2018 GMC Acadia come from 6 brands — DORMAN, SKP, AUTOTECNICA and 3 other brands. The "Popular" part is DORMAN 54218.

Part numbers include DORMAN 54218, SKP SK54218 and AUTOTECNICA GM0714619, among others listed above.

This table covers the adapters used to pressure-test this cooling system. Read more

3 Cooling System Tester Adapter parts are listed for the 2018 GMC Acadia, from MOTORAD and GATES.

Listed part numbers: GATES 31391, MOTORAD 3128 and MOTORAD 3127.

This table covers the Hose clamps. Read more

GM GENUINE supplies the 4 Hose Clamp parts for the 2018 GMC Acadia.

This group includes GM GENUINE 11547681, GM GENUINE 90572589 and GM GENUINE 90572587 and the remaining parts above.

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

9 Radiator parts are listed for the 2018 GMC Acadia, from GM GENUINE, TYC, AGILITY and 5 other brands. GM GENUINE 85797937 carries the "Popular" badge.

Listed part numbers: GM GENUINE 85797937, TYC 13613 and AGILITY 8013613, plus the other parts above.

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

2 Radiator Cap parts are listed for the 2018 GMC Acadia, from ACDELCO and PROFESSIONAL PARTS SWEDEN.

This group includes ACDELCO RC124 and PROFESSIONAL PARTS SWEDEN 21342353.

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

This group shows a single part: GM GENUINE 23444086.

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

11 Radiator Fan Assembly parts for the 2018 GMC Acadia come from 8 brands — DORMAN, GM GENUINE, UAC and 5 other brands. The "Popular" part is DORMAN 620946.

The Economy section: 4 options from DORMAN, SKP and VEMO. DORMAN 620946 is listed in this group.

Standard Replacement: 7 parts, from GM GENUINE, UAC, AGILITY and 2 other brands. A representative part number is GM GENUINE 1581874.

This table covers the upper, lower and connecting hoses between radiator, engine and reservoir. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle. Read more

9 Radiator Hose parts for the 2018 GMC Acadia come from 4 brands — ACDELCO, GATES, GM GENUINE and 1 other brand. The "Popular" part is ACDELCO 23253702.

Part numbers include ACDELCO 23253702, CONTINENTAL 66587 and ACDELCO 84006779, among others listed above.

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

2 Radiator Seal parts for the 2018 GMC Acadia come from GM GENUINE.

Listed part numbers: GM GENUINE 23100851 and GM GENUINE 23100852.

This table covers the Radiator Upper Air Baffle retainers and clips. Read more

2 Radiator Upper Air Baffle Retainer / Clip parts for the 2018 GMC Acadia come from DORMAN.

Part numbers include DORMAN 700365 and DORMAN 963058.

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

6 Temperature Sender / Sensor parts are listed for the 2018 GMC Acadia, from GPD, VEMO, GM GENUINE and 3 other brands. GM GENUINE 12650595 carries the "Popular" badge.

Economy: 2 parts, from GPD and VEMO. A representative part number is GPD 1712908.

The Standard Replacement section: 4 options from GM GENUINE, STANDARD MOTOR PRODUCTS, DELPHI and 1 other brand. GM GENUINE 12650595 is listed in this group.

Part numbers include GM GENUINE 12650595, GPD 1712908 and VEMO V51720323, among others listed above.

This table covers the thermostats that open the coolant circuit at the specified temperature. Typical signs include slow warm-up, a gauge that climbs in traffic, or heat that never quite arrives. Replace the housing gasket with the thermostat and bleed the system so a trapped air pocket does not cook the new part. Read more

4 Thermostat parts for the 2018 GMC Acadia come from 2 brands — MOTORAD and FOUR SEASONS.

Heavy Duty: 1 part, from MOTORAD. A representative part number is MOTORAD 5860203.

Standard Replacement: 3 parts, from MOTORAD and FOUR SEASONS. A representative part number is FOUR SEASONS 86343.

Listed part numbers: MOTORAD 5860203, FOUR SEASONS 86343 and MOTORAD 860203, plus the other parts 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

6 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2018 GMC Acadia, from GM GENUINE, MAHLE / CLEVITE, ELRING and 1 other brand. GM GENUINE 12647181 carries the "Popular" badge.

Listed part numbers: GM GENUINE 12647181, GM GENUINE 12623519 and ELRING 048290, plus the other parts above.

This table covers the housings and outlets the thermostat sits in. Read more

3 Thermostat Housing / Water Outlet parts for the 2018 GMC Acadia come from 3 brands — DORMAN, GATES and GM GENUINE.

The Economy section: 1 option from DORMAN. DORMAN 9022098 is listed in this group.

Standard Replacement: 2 parts, from GATES and GM GENUINE. A representative part number is GATES CO35087.

This group includes DORMAN 9022098, GATES CO35087 and GM GENUINE 12741009.

This table covers the gaskets that seal the Water Inlet. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

3 Water Inlet Gasket parts are listed for the 2018 GMC Acadia, from FEL-PRO, GM GENUINE and MAHLE / CLEVITE.

Listed part numbers: FEL-PRO 36167, GM GENUINE 12647400 and MAHLE / CLEVITE C33508.

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

5 Water Pump parts for the 2018 GMC Acadia come from 5 brands — FVP, US MOTOR WORKS, GM GENUINE and 2 other brands. The "Popular" part is GM GENUINE 12707180.

The Economy section: 2 options from FVP and US MOTOR WORKS. FVP US8148 is listed in this group.

Standard Replacement: 3 parts, from GM GENUINE, ACDELCO and GATES. A representative part number is GM GENUINE 12707180.

Part numbers include GM GENUINE 12707180 and FVP US8148, among others listed above.

This table covers the gaskets between the water pump and the block or housing. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

5 Water Pump Gasket parts are listed for the 2018 GMC Acadia, from ELRING, GM GENUINE and FEL-PRO. GM GENUINE 2512072 carries the "Popular" badge.

This group includes GM GENUINE 2512072, ELRING 048370 and ELRING 048320 and the remaining parts above.

This table covers the Water Pump Inlet tubes. Read more

This group shows a single part: GM GENUINE 12706857.

This table covers the Water Pump pulleys. Typical signs include a growl or chirp that follows engine speed, or a pulley that will not spin freely by hand. Spin each pulley with the belt off. Roughness or play means replace it with the belt. Read more

One part is listed for the 2018 GMC Acadia — GM GENUINE 12652047.

This table covers the Water Pump Seal O-rings. Typical signs include a seep at a fitting or a housing that weeps after a service. Lube the new O-ring with the fluid it will see, and do not roll it into the groove. Read more

4 Water Pump Seal / O-Ring parts for the 2018 GMC Acadia come from 2 brands — GM GENUINE and ELRING.

Listed part numbers: ELRING 048350, GM GENUINE 12646951 and GM GENUINE 12646952, plus the other parts above.