2020 GMC Terrain 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 2020 GMC Terrain come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is FVP MV5050GAL. Every part fits both the 1.5L L4 Turbocharged and the 2.0L L4 Turbocharged.

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

5 Coolant Air Bleed Hose / Pipe parts for the 2020 GMC Terrain come from GM GENUINE.

This group includes GM GENUINE 12650443, GM GENUINE 84914036 and GM GENUINE 12634280 and the remaining parts above.

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

3 Coolant Hose / Pipe parts for the 2020 GMC Terrain come from GM GENUINE.

Part numbers include GM GENUINE 12649871, GM GENUINE 12667458 and GM GENUINE 12627054.

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

6 Coolant Hose / Pipe Seal parts are listed for the 2020 GMC Terrain, from GM GENUINE, FEL-PRO and MAHLE / CLEVITE. GM GENUINE 12635750 carries the "Popular" badge.

Listed part numbers: GM GENUINE 12635750, GM GENUINE 12662185 and FEL-PRO 36247, plus the other parts above.

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

This group shows a single part: GM GENUINE 11548868.

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

7 Coolant Reservoir parts are listed for the 2020 GMC Terrain, from TECHPRO, DORMAN, GM GENUINE and 3 other brands. DORMAN 603861 carries the "Popular" badge.

Part numbers include DORMAN 603861, GM GENUINE 23386455 and GPD 2411160, among others listed 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 are listed for the 2020 GMC Terrain, from DORMAN, SKP, AUTOTECNICA and 3 other brands. DORMAN 54218 carries the "Popular" badge.

This group includes DORMAN 54218, SKP SK54218 and AUTOTECNICA GM0714619 and the remaining parts above.

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

2 Cooling System Tester Adapter parts for the 2020 GMC Terrain come from MOTORAD.

Part numbers include MOTORAD 3128 and MOTORAD 3127.

This table covers the Hose clamps. Read more

6 Hose Clamp parts for the 2020 GMC Terrain come from GM GENUINE. The "Popular" part is GM GENUINE 90572594.

Listed part numbers: GM GENUINE 90572594, GM GENUINE 90530642 and GM GENUINE 11570614, plus the other parts above.

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

5 Intercooler parts for the 2020 GMC Terrain come from 5 brands — TYC, DORMAN, GM GENUINE and 2 other brands. The "Popular" part is TYC 18103.

Listed part numbers: TYC 18103, DORMAN 918527 and GM GENUINE 85046823, plus the other parts above.

This table covers the Intercooler Air Hose pipes. Read more

2 Intercooler Air Hose / Pipe parts for the 2020 GMC Terrain come from GM GENUINE.

Part numbers include GM GENUINE 84836352 and GM GENUINE 84498032.

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

8 Radiator parts for the 2020 GMC Terrain come from 8 brands — CSF, TYC, AGILITY and 5 other brands. The "Popular" part is CSF 3866.

This group includes CSF 3866, TYC 13682 and AGILITY 8013691 and the remaining 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 for the 2020 GMC Terrain come from 2 brands — ACDELCO and PROFESSIONAL PARTS SWEDEN.

Listed part numbers: ACDELCO RC124 and PROFESSIONAL PARTS SWEDEN 21342353.

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

2 Radiator Drain Petcock parts are listed for the 2020 GMC Terrain, from ACDELCO and DORMAN.

Listed part numbers: ACDELCO 22985584 and DORMAN 61134.

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

10 Radiator Fan Assembly parts are listed for the 2020 GMC Terrain, from DORMAN, GPD, TECHPRO and 7 other brands. GM GENUINE 84847895 carries the "Popular" badge.

Economy: 4 parts, from DORMAN, GPD, TECHPRO and 1 other brand. A representative part number is DORMAN 621985.

The Standard Replacement section: 5 options from GM GENUINE, TYC, AGILITY and 2 other brands. GM GENUINE 84847895 is listed in this group.

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

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 2020 GMC Terrain, from ACDELCO, GATES and CONTINENTAL. ACDELCO 84914035 carries the "Popular" badge.

Part numbers include ACDELCO 84914035, GATES 51802 and ACDELCO 84914034, among others listed above.

This table covers the Radiator Insulator sleeves. Read more

One part is listed for the 2020 GMC Terrain — GM GENUINE 23134225.

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

GM GENUINE supplies the 3 Radiator Seal parts for the 2020 GMC Terrain.

This group includes GM GENUINE 23270572, GM GENUINE 85607646 and GM GENUINE 85607647.

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 for the 2020 GMC Terrain come from 5 brands — STANDARD MOTOR PRODUCTS, HOLSTEIN, GM GENUINE and 2 other brands. The "Popular" part is GM GENUINE 12641073.

The Economy section: 2 options from HOLSTEIN and STANDARD MOTOR PRODUCTS. HOLSTEIN 2CTS0125 is listed in this group.

Standard Replacement: 4 parts, from GM GENUINE, STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and 1 other brand. A representative part number is GM GENUINE 12641073.

Part numbers include GM GENUINE 12641073, HOLSTEIN 2CTS0125 and STANDARD MOTOR PRODUCTS TX229T, among others listed above.

This table covers the Temperature Sender / Sensor clips. Read more

This group shows a single part: DORMAN 66264.

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

5 Thermostat parts are listed for the 2020 GMC Terrain, from AUTOTECNICA, DORMAN, SKP and 2 other brands. MOTORAD 993176 carries the "Popular" badge.

Economy: 3 parts, from AUTOTECNICA, DORMAN and SKP. A representative part number is AUTOTECNICA GM0720227.

The Standard Replacement section: 2 options from MOTORAD and GATES. MOTORAD 993176 is listed in this group.

This group includes MOTORAD 993176, AUTOTECNICA GM0720227 and DORMAN 9022124 and the remaining 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

5 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2020 GMC Terrain come from 4 brands — GM GENUINE, FEL-PRO, MAHLE / CLEVITE and 1 other brand. The "Popular" part is GM GENUINE 12649163.

Listed part numbers: GM GENUINE 12649163, FEL-PRO 36208 and GM GENUINE 12664202, plus the other parts above.

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

7 Thermostat Housing / Water Outlet parts are listed for the 2020 GMC Terrain, from GM GENUINE, DORMAN, SKP and 3 other brands. DORMAN 9022132 carries the "Popular" badge.

Economy: 2 parts, from DORMAN and SKP. A representative part number is DORMAN 9022132.

The Standard Replacement section: 5 options from GM GENUINE, FOUR SEASONS, GATES and 1 other brand. GM GENUINE 12707589 is listed in this group.

This group includes DORMAN 9022132, SKP SK9022132 and GM GENUINE 12707589 and the remaining parts above.

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

10 Water Pump parts are listed for the 2020 GMC Terrain, from GM GENUINE, GMB, FVP and 4 other brands. GM GENUINE 25205820 carries the "Popular" badge.

Economy: 3 parts, from FVP, SKP and US MOTOR WORKS. A representative part number is FVP US8147.

The Standard Replacement section: 7 options from GM GENUINE, GMB, DAYCO and 1 other brand. GM GENUINE 25205820 is listed in this group.

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

6 Water Pump Gasket parts for the 2020 GMC Terrain come from 3 brands — GM GENUINE, FEL-PRO and MAHLE / CLEVITE. The "Popular" part is GM GENUINE 2512070.

Part numbers include GM GENUINE 2512070, GM GENUINE 2512067 and FEL-PRO 36209, among others listed above.

This table covers the Water Pump housings. Read more

2 Water Pump Housing parts for the 2020 GMC Terrain come from 2 brands — ACDELCO and GM GENUINE.

Part numbers include ACDELCO 12708796 and GM GENUINE 25204308.

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

This group shows a single part: GM GENUINE 12642753.