2021 Chevrolet Express 4500 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

15 Coolant / Antifreeze parts for the 2021 Chevrolet Express 4500 come from 4 brands — PRESTONE, PEAK, ACDELCO and 1 other brand. 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 PEAK and PRESTONE — the catalog's value-priced group. PEAK BQA1GAL is listed in this group.

In the Heavy Duty grade, PEAK and PRESTONE supply 3 parts: rated for severe service. A representative part number is PEAK FCA1GAL.

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, PRESTONE, ACDELCO, AISIN and 1 other brand 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

2 Coolant Hose / Pipe parts for the 2021 Chevrolet Express 4500 come from GM GENUINE.

Part numbers include GM GENUINE 25866165 and GM GENUINE 84882346.

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

This group shows a single part: GM GENUINE 11547271.

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

4 Coolant Reservoir parts are listed for the 2021 Chevrolet Express 4500, from GM GENUINE, DORMAN and GPD.

This group includes DORMAN 603078, GM GENUINE 85604316 and GM GENUINE 85666315 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

5 Coolant Reservoir Cap parts are listed for the 2021 Chevrolet Express 4500, from GM GENUINE, DORMAN, MOTORAD and 1 other brand. DORMAN 54218 carries the "Popular" badge.

Part numbers include DORMAN 54218, GM GENUINE RC121 and GM GENUINE RC122, among others listed above.

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

2 Coolant Reservoir Retainer / Clip parts for the 2021 Chevrolet Express 4500 come from GM GENUINE.

This group includes GM GENUINE 10121502 and GM GENUINE 23382103.

This table covers the Hose clamps. Read more

3 Hose Clamp parts for the 2021 Chevrolet Express 4500 come from GM GENUINE.

Part numbers include GM GENUINE 90530642, GM GENUINE 11603888 and GM GENUINE 86308358.

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 4500 — 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

3 Radiator parts for the 2021 Chevrolet Express 4500 come from 3 brands — CSF, FVP and GM GENUINE.

Listed part numbers: CSF 4021, FVP RAD14058 and GM GENUINE 84916454.

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 Chevrolet Express 4500 come from 3 brands — ACDELCO, GATES and MOTORAD.

Listed part numbers: ACDELCO RC85, GATES 31532 and MOTORAD T46.

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

One part is listed for the 2021 Chevrolet Express 4500 — 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

2 Radiator Fan Blade parts are listed for the 2021 Chevrolet Express 4500, from ACDELCO and GM GENUINE.

Part numbers include ACDELCO 84723175 and GM GENUINE 86532393.

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

3 Radiator Fan Clutch parts for the 2021 Chevrolet Express 4500 come from 3 brands — FOUR SEASONS, GM GENUINE and HAYDEN.

This group includes FOUR SEASONS 46145, GM GENUINE 84595910 and HAYDEN 2984.

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

This group shows a single part: 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

ACDELCO supplies the 3 Radiator Hose parts for the 2021 Chevrolet Express 4500.

This group includes ACDELCO 85144276, ACDELCO 84882345 and ACDELCO 84984107.

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 2021 Chevrolet Express 4500 come from 5 brands — ULTRA-POWER, GPD, GM GENUINE and 2 other brands. The "Popular" part is ULTRA-POWER 5S13427.

The Economy section: 2 options from ULTRA-POWER and GPD. ULTRA-POWER 5S13427 is listed in this group.

Standard Replacement: 3 parts, from GM GENUINE, WALKER PRODUCTS and WELLS. A representative part number is GM GENUINE 25186240.

Listed part numbers: ULTRA-POWER 5S13427, GPD 1712496 and GM GENUINE 25186240, plus the other parts 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

12 Thermostat parts are listed for the 2021 Chevrolet Express 4500, from MOTORAD, DORMAN, SKP and 2 other brands. ACDELCO 131160 carries the "Popular" badge.

Economy: 2 parts, from DORMAN and SKP. A representative part number is DORMAN 9022981.

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: 6 options from MOTORAD, ACDELCO and GATES. 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

2 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2021 Chevrolet Express 4500 come from 2 brands — FEL-PRO and VICTOR REINZ.

Part numbers include FEL-PRO 36219 and VICTOR REINZ 711357800.

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 4500, 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.

Part numbers include 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 4500 come from GM GENUINE.

Listed part numbers: GM GENUINE 12587397 and GM GENUINE 12650512.

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

3 Water Pump parts are listed for the 2021 Chevrolet Express 4500, from FVP, GM GENUINE and GMB.

Listed part numbers: FVP 1303210 and GM GENUINE 12735409, plus the other parts 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

3 Water Pump Gasket parts for the 2021 Chevrolet Express 4500 come from 3 brands — FEL-PRO, GM GENUINE and MAHLE / CLEVITE.

This group includes FEL-PRO 36110, GM GENUINE 2512073 and MAHLE / CLEVITE K33358.