2021 Chevrolet Express 2500 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 Chevrolet Express 2500 come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is FVP MV5050GAL. Every part fits all 3 engine options (2.8L L4 DIESEL Turbocharged, 4.3L V6 and 6.6L 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 hard pipes and extra hoses in the coolant circuit. Read more

5 Coolant Hose / Pipe parts for the 2021 Chevrolet Express 2500 come from GM GENUINE.

This group includes GM GENUINE 84292423, GM GENUINE 24585986 and GM GENUINE 25866165 and the remaining parts above.

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

2 Coolant Hose Retainer / Clip parts for the 2021 Chevrolet Express 2500 come from GM GENUINE.

This group includes GM GENUINE 11547445 and GM GENUINE 11547271.

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

7 Coolant Reservoir parts are listed for the 2021 Chevrolet Express 2500, from GM GENUINE, TECHPRO, DORMAN and 2 other brands.

Listed part numbers: DORMAN 603078, GM GENUINE 84225911 and GM GENUINE 85604316, 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

9 Coolant Reservoir Cap parts are listed for the 2021 Chevrolet Express 2500, from CALORSTAT, MOTORAD, DORMAN and 4 other brands. DORMAN 54218 carries the "Popular" badge.

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 Chevrolet Express 2500 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 2021 Chevrolet Express 2500 come from GM GENUINE.

Part numbers include GM GENUINE 11602072, GM GENUINE 11547121 and GM GENUINE 11548772, 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 19353996.

This table covers the Intercooler Air Hose pipes. Read more

2 Intercooler Air Hose / Pipe parts for the 2021 Chevrolet Express 2500 come from GM GENUINE.

Listed part numbers: GM GENUINE 84343023 and GM GENUINE 86793099.

This table covers the Intercooler mounts. Typical signs include a clunk on takeoff, a vibration at idle, or a separated rubber insert. Support the powertrain before unbolting a mount, and torque the fasteners in the notes. Read more

One part is listed for the 2021 Chevrolet Express 2500 — GM GENUINE 19300880.

This table covers the seals at the Intercooler. 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 Chevrolet Express 2500 — GM GENUINE 19130019.

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 Chevrolet Express 2500 come from 7 brands — GM GENUINE, GPD, FVP and 4 other brands. The "Popular" part is FVP RAD2935.

The Economy section: 2 options from GPD. GPD 2935C is listed in this group.

Standard Replacement: 9 parts, from GM GENUINE, SPECTRA PREMIUM, UAC and 3 other brands. A representative part number is FVP RAD2935.

3 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

5 Radiator Cap parts for the 2021 Chevrolet Express 2500 come from 4 brands — ACDELCO, GATES, MOTORAD and 1 other brand.

Part numbers include ACDELCO RC124, ACDELCO RC85 and GATES 31532, among others listed above.

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

One part is listed for the 2021 Chevrolet Express 2500 — GM GENUINE 22790134.

This table covers the Radiator Fan blades. Typical signs include chatter, streaks, or a skip at the top of the stroke. Confirm left and right lengths in the notes — they are often different. Read more

5 Radiator Fan Blade parts are listed for the 2021 Chevrolet Express 2500, from GM GENUINE and ACDELCO.

Listed part numbers: ACDELCO 1581941, ACDELCO 84723175 and GM GENUINE 1581842, plus the other parts above.

This table covers the Radiator Fan clutches. Typical signs include slip at highway speed, chatter on takeoff, or a pedal that stays low. Resurface or replace the flywheel with the clutch — a heat-checked flywheel wastes the new disc. Read more

14 Radiator Fan Clutch parts for the 2021 Chevrolet Express 2500 come from 7 brands — HAYDEN, GM GENUINE, FOUR SEASONS and 4 other brands. The "Popular" part is HAYDEN 3210.

This table covers the brackets that mount the Radiator Fan Motor. 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 24591472.

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

3 Radiator Fan Shroud parts for the 2021 Chevrolet Express 2500 come from GM GENUINE.

Listed part numbers: GM GENUINE 84243708, GM GENUINE 84362765 and GM GENUINE 84145362.

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 Chevrolet Express 2500, from ACDELCO and GM GENUINE.

Listed part numbers: ACDELCO 84185766, ACDELCO 84186464 and ACDELCO 85144276, plus the other parts above.

This table covers the brackets that mount the Radiator Hose. 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

One part is listed for the 2021 Chevrolet Express 2500 — GM GENUINE 15905241.

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 Chevrolet Express 2500 come from 12 brands — HOLSTEIN, ULTRA-POWER, GPD and 9 other brands. The "Popular" part is ULTRA-POWER 5S13427. 1 part fits every engine; the other 19 are engine-specific.

The Economy section: 8 options from HOLSTEIN, ULTRA-POWER, GPD and 1 other brand. ULTRA-POWER 5S13427 is listed in this group.

Standard Replacement: 12 parts, from STANDARD MOTOR PRODUCTS, WELLS, GM GENUINE and 5 other brands. A representative part number is HELLA 009107611.

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

23 Thermostat parts are listed for the 2021 Chevrolet Express 2500, from MOTORAD, AUTOTECNICA, SKP and 8 other brands. ACDELCO 131160 carries the "Popular" badge.

Economy: 5 parts, from AUTOTECNICA, SKP and DORMAN. A representative part number is AUTOTECNICA GM0720263.

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: 14 options from MOTORAD, CALORSTAT, ACDELCO and 5 other brands. ACDELCO 131160 is listed in this group.

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 Chevrolet Express 2500 come from 4 brands — FEL-PRO, MAHLE / CLEVITE, GM GENUINE and 1 other brand. The "Popular" part is FEL-PRO 36106.

Part numbers include FEL-PRO 36106, FEL-PRO 36213 and FEL-PRO 36219, among others listed above.

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

3 Thermostat Housing / Water Outlet parts are listed for the 2021 Chevrolet Express 2500, from DORMAN, FOUR SEASONS and MOTORAD.

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

The Standard Replacement section: 2 options from FOUR SEASONS and MOTORAD. FOUR SEASONS 85945 is listed in this group.

Listed part numbers: DORMAN 9022081, FOUR SEASONS 85945 and MOTORAD CH5945.

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

2 Water Inlet Gasket parts for the 2021 Chevrolet Express 2500 come from GM GENUINE. 1 part fits every engine; the other 1 is engine-specific.

Part numbers include GM GENUINE 12650512 and 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

15 Water Pump parts are listed for the 2021 Chevrolet Express 2500, from FVP, GM GENUINE, GMB and 5 other brands. GATES 41214 carries the "Popular" badge.

Economy: 4 parts, from FVP, JAPANESE OE, US MOTOR WORKS and 1 other brand. A representative part number is FVP US8154.

The Standard Replacement section: 8 options from GATES, GM GENUINE, GMB and 2 other brands. GATES 41214 is listed in this group.

3 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

5 Water Pump Gasket parts for the 2021 Chevrolet Express 2500 come from 3 brands — FEL-PRO, GM GENUINE and MAHLE / CLEVITE.

This group includes FEL-PRO 36110, FEL-PRO 36109 and GM GENUINE 251777 and the remaining parts above.

This table covers the Water Pump Inlet tubes. Read more

One part is listed for the 2021 Chevrolet Express 2500 — GM GENUINE 55589331.