2021 GMC Yukon 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 for the 2021 GMC Yukon come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is FVP MV5050GAL. Every part fits all 3 engine options (3.0L L6 DIESEL Turbocharged, 5.3L V8 and 6.2L V8).

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 4 options from FVP, PEAK, PRESTONE and 1 other brand — the catalog's value-priced group. FVP MV5050GAL 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 and PEAK supply 4 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, ACDELCO and 2 other brands supply 7 parts: built to original-equipment specification. A representative part number is ACDELCO 105027.

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

2 Coolant Air Bleed Hose / Pipe parts for the 2021 GMC Yukon come from GM GENUINE.

Listed part numbers: GM GENUINE 85044183 and GM GENUINE 85044182.

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

10 Coolant Hose / Pipe parts for the 2021 GMC Yukon come from GM GENUINE. The "Popular" part is GM GENUINE 85510535.

This table covers the seals at the Coolant Hose / Pipe. 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 2021 GMC Yukon — GM GENUINE 55496156.

This table covers the Coolant Hose Connector flanges. Read more

This group shows a single part: GM GENUINE 1510595.

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

3 Coolant Hose Retainer / Clip parts for the 2021 GMC Yukon come from GM GENUINE.

Listed part numbers: GM GENUINE 11549232, GM GENUINE 11548672 and GM GENUINE 11549297.

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

9 Coolant Reservoir parts are listed for the 2021 GMC Yukon, from TECHPRO, GM GENUINE, DORMAN and 2 other brands.

This group includes DORMAN 603149, GM GENUINE 84645616 and GM GENUINE 84632822 and the remaining 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

7 Coolant Reservoir Cap parts are listed for the 2021 GMC Yukon, from MOTORAD, DORMAN, SKP and 3 other brands. DORMAN 54218 carries the "Popular" badge. 4 parts fit every engine; the other 3 are engine-specific.

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

2 Cooling System Tester Adapter parts for the 2021 GMC Yukon come from MOTORAD.

Listed part numbers: MOTORAD 3128 and MOTORAD 3127.

This table covers the Hose clamps. Read more

8 Hose Clamp parts for the 2021 GMC Yukon come from GM GENUINE. The "Popular" part is GM GENUINE 11570871. 4 parts fit every engine; the other 4 are engine-specific.

Part numbers include GM GENUINE 11570871, GM GENUINE 90530642 and GM GENUINE 90572594, among others listed above.

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

This group shows a single part: GM GENUINE 55512267.

This table covers the Intercooler Air Hose pipes. Read more

2 Intercooler Air Hose / Pipe parts for the 2021 GMC Yukon come from GM GENUINE.

Listed part numbers: GM GENUINE 55515941 and GM GENUINE 55515942.

This table covers the brackets that mount the Intercooler Hose / Pipe. Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

This group shows a single part: GM GENUINE 40009428.

This table covers the Intercooler Hose / Pipe clamps. Read more

One part is listed for the 2021 GMC Yukon — GM GENUINE 11549085.

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

14 Radiator parts for the 2021 GMC Yukon come from 7 brands — GPD, CSF, KOYORAD and 4 other brands. The "Popular" part is CSF 3978.

The Economy section: 3 options from GPD. GPD 13843C is listed in this group.

Standard Replacement: 9 parts, from CSF, KOYORAD, GM GENUINE and 2 other brands. A representative part number is CSF 3978.

2 further parts sit outside the graded sections, with the same engine-level match.

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

3 Radiator Cap parts for the 2021 GMC Yukon come from 3 brands — ACDELCO, GATES and PROFESSIONAL PARTS SWEDEN. 1 part fits every engine; the other 2 are engine-specific.

Part numbers include ACDELCO RC124, GATES 31569 and PROFESSIONAL PARTS SWEDEN 21342353.

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

One part is listed for the 2021 GMC Yukon — GM GENUINE 22790134.

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

17 Radiator Fan Assembly parts are listed for the 2021 GMC Yukon, from GM GENUINE, AGILITY, TECHPRO and 6 other brands. DORMAN 621806 carries the "Popular" badge.

Economy: 6 parts, from TECHPRO, GPD, DORMAN and 1 other brand. A representative part number is DORMAN 621806.

The Standard Replacement section: 11 options from GM GENUINE, AGILITY, TYC and 2 other brands. TYC 625090 is listed in this group.

This table covers the Radiator Fan motors. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor. Read more

This group shows a single part: GM GENUINE 85654566.

This table covers the shrouds that duct air through the fan and radiator. Read more

2 Radiator Fan Shroud parts for the 2021 GMC Yukon come from GM GENUINE.

Part numbers include GM GENUINE 84203930 and GM GENUINE 84120130.

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

6 Radiator Hose parts are listed for the 2021 GMC Yukon, from ACDELCO and GATES.

This group includes ACDELCO 85046337, ACDELCO 85046339 and ACDELCO 85522402 and the remaining parts above.

This table covers the Radiator Overflow Tube repair kits. Read more

One part is listed for the 2021 GMC Yukon — GM GENUINE 22799347.

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

20 Temperature Sender / Sensor parts for the 2021 GMC Yukon come from 9 brands — GPD, HOLSTEIN, GM GENUINE and 6 other brands. The "Popular" part is GM GENUINE 55497116.

The Economy section: 7 options from GPD, HOLSTEIN and ULTRA-POWER. GPD 1814558 is listed in this group.

Standard Replacement: 12 parts, from STANDARD MOTOR PRODUCTS, WALKER PRODUCTS, GM GENUINE and 3 other brands. A representative part number is GM GENUINE 55497116.

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

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

20 Thermostat parts are listed for the 2021 GMC Yukon, from MOTORAD, CALORSTAT, AUTOTECNICA and 7 other brands. ACDELCO 131160 carries the "Popular" badge.

Economy: 3 parts, from AUTOTECNICA, DORMAN and SKP. A representative part number is AUTOTECNICA GM0718523.

The Heavy Duty section: 2 options from MOTORAD. MOTORAD 5523187 is listed in this group.

In the Performance grade, MOTORAD supplies 2 parts: engineered beyond original-equipment specification. A representative part number is MOTORAD 2523160.

The Standard Replacement section: 12 options from MOTORAD, CALORSTAT, ACDELCO and 4 other brands. ACDELCO 131160 is listed in this group.

1 ungrouped part is not assigned to a grade, with the same engine-level match.

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

7 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2021 GMC Yukon come from 4 brands — GM GENUINE, FEL-PRO, APEX and 1 other brand.

Listed part numbers: APEX AWO2386, FEL-PRO 36219 and FEL-PRO 36106, plus the other parts above.

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

6 Thermostat Housing / Water Outlet parts are listed for the 2021 GMC Yukon, from GM GENUINE, DORMAN, FOUR SEASONS and 2 other brands.

Economy: 1 part, from DORMAN. A representative part number is DORMAN 9022081.

The Standard Replacement section: 3 options from FOUR SEASONS, GATES and MOTORAD. FOUR SEASONS 85945 is listed in this group.

2 ungrouped parts are not assigned to a grade, with the same engine-level match.

Listed part numbers: DORMAN 9022081, FOUR SEASONS 85945 and GATES CO34829, plus the other parts above.

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

This group shows a single part: GM GENUINE 12587397.

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

11 Water Pump parts are listed for the 2021 GMC Yukon, from GM GENUINE, FVP, SKP and 3 other brands. GM GENUINE 13551859 carries the "Popular" badge.

Economy: 4 parts, from FVP, SKP and US MOTOR WORKS. A representative part number is FVP US8206TS.

The Standard Replacement section: 3 options from GM GENUINE and GATES. GM GENUINE 13551859 is listed in this group.

4 ungrouped parts are not assigned to a grade, with the same engine-level match.

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

7 Water Pump Gasket parts for the 2021 GMC Yukon come from 4 brands — FEL-PRO, GM GENUINE, APEX and 1 other brand. The "Popular" part is FEL-PRO 36110.

Part numbers include FEL-PRO 36110, GM GENUINE 2512073 and APEX AWP3308, among others listed above.

This table covers the Water Pump Inlet tubes. Read more

GM GENUINE supplies both parts for the 2021 GMC Yukon.

This group includes GM GENUINE 55496798 and GM GENUINE 55496921.