2018 Chevrolet Express 3500 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

18 Coolant / Antifreeze parts are listed for the 2018 Chevrolet Express 3500, from PRESTONE, VALVOLINE, PEAK 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 2 options from PRESTONE and VALVOLINE — 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

4 Coolant Air Bleed Hose / Pipe parts are listed for the 2018 Chevrolet Express 3500, from GM GENUINE, DORMAN and GATES.

This group includes DORMAN 626591, GATES HHA147 and GM GENUINE 12600254 and the remaining parts above.

This table covers the bleeders used to purge air from the coolant circuit. Read more

This group shows a single part: GM GENUINE 12602048.

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

GM GENUINE supplies both parts for the 2018 Chevrolet Express 3500.

Part numbers include GM GENUINE 25866165 and GM GENUINE 84443244.

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

This group shows a single part: ELRING 868630.

This table covers the Coolant Hose Connector flanges. Read more

One part is listed for the 2018 Chevrolet Express 3500 — GM GENUINE 1510595.

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

GM GENUINE supplies the 3 Coolant Hose Retainer / Clip parts for the 2018 Chevrolet Express 3500.

Part numbers include GM GENUINE 11547355, GM GENUINE 11547445 and GM GENUINE 89023418.

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

4 Coolant Reservoir parts for the 2018 Chevrolet Express 3500 come from 3 brands — GM GENUINE, DORMAN and GPD.

Listed part numbers: DORMAN 603078, GM GENUINE 85604316 and GM GENUINE 85666315, 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

5 Coolant Reservoir Cap parts for the 2018 Chevrolet Express 3500 come from 4 brands — GM GENUINE, CALORSTAT, DORMAN and 1 other brand. The "Popular" part is CALORSTAT RC0147.

This group includes CALORSTAT RC0147, DORMAN 82594 and GM GENUINE RC121 and the remaining parts above.

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

GM GENUINE supplies both parts for the 2018 Chevrolet Express 3500.

This group includes GM GENUINE 10121502 and GM GENUINE 23382103.

This table covers the Coolant Water Crossover Mounting sets. Read more

One part is listed for the 2018 Chevrolet Express 3500 — FEL-PRO ES73027.

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 Chevrolet Express 3500, from MOTORAD and GATES.

This group includes GATES 31391, MOTORAD 3128 and MOTORAD 3127.

This table covers the Hose clamps. Read more

GM GENUINE supplies the 3 Hose Clamp parts for the 2018 Chevrolet Express 3500.

This group includes GM GENUINE 11548759, GM GENUINE 11517127 and GM GENUINE 90530642.

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

This group shows a single part: 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

15 Radiator parts are listed for the 2018 Chevrolet Express 3500, from GM GENUINE, GPD, SPECTRA PREMIUM and 6 other brands. GM GENUINE 21939 carries the "Popular" badge.

Economy: 2 parts, from GPD. A representative part number is GPD 2791C.

The Standard Replacement section: 13 options from GM GENUINE, SPECTRA PREMIUM, AGILITY and 5 other brands. GM GENUINE 21939 is listed in this group.

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 are listed for the 2018 Chevrolet Express 3500, from ACDELCO, GATES and MOTORAD.

Part numbers include ACDELCO RC85, GATES 31532 and MOTORAD T46.

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

6 Radiator Fan Blade parts for the 2018 Chevrolet Express 3500 come from 5 brands — GM GENUINE, ACDELCO, DORMAN and 2 other brands.

This group includes ACDELCO 1581941, DORMAN 621515 and GM GENUINE 86532392 and the remaining 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

17 Radiator Fan Clutch parts are listed for the 2018 Chevrolet Express 3500, from US MOTOR WORKS, GM GENUINE, FOUR SEASONS and 3 other brands. FOUR SEASONS 36973 carries the "Popular" badge.

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

6 Radiator Fan Shroud parts are listed for the 2018 Chevrolet Express 3500, from DORMAN, GPD, GM GENUINE and 1 other brand. DORMAN 620995 carries the "Popular" badge.

This group includes DORMAN 620995, DORMAN 620994 and GM GENUINE 84362765 and the remaining parts above.

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

12 Radiator Hose parts for the 2018 Chevrolet Express 3500 come from 5 brands — ACDELCO, DAYCO, GATES and 2 other brands. The "Popular" part is DAYCO 72374.

This table covers the Radiator Mount bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles. Read more

This group shows a single part: DORMAN 926276.

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

This group shows a single part: GM GENUINE 19256219.

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

This group shows a single part: DORMAN 963208.

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

24 Temperature Sender / Sensor parts are listed for the 2018 Chevrolet Express 3500, from STANDARD MOTOR PRODUCTS, WALKER PRODUCTS, GPD and 12 other brands. STANDARD MOTOR PRODUCTS TX89T carries the "Popular" badge.

Economy: 8 parts, from GPD, HOLSTEIN, UNITED MOTOR PRODUCTS and 2 other brands. A representative part number is STANDARD MOTOR PRODUCTS TX89T.

In the Full Service Kit grade, WALKER PRODUCTS supplies 1 part: grouped under the catalog's "Full Service Kit" designation — the notes column spells out what sets them apart. A representative part number is WALKER PRODUCTS 21191118.

The Standard Replacement section: 15 options from GM GENUINE, STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and 8 other brands. GM GENUINE 2134333 is listed in this group.

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

19 Thermostat parts for the 2018 Chevrolet Express 3500 come from 10 brands — MOTORAD, CALORSTAT, AUTOTECNICA and 7 other brands. The "Popular" part is ACDELCO 131160.

The Economy section: 3 options from AUTOTECNICA, DORMAN and SKP. AUTOTECNICA GM0718523 is listed in this group.

Heavy Duty: 2 parts, from MOTORAD. A representative part number is MOTORAD 5523187.

The Performance section lists 2 options from MOTORAD — engineered beyond original-equipment specification. MOTORAD 2523160 is listed in this group.

Standard Replacement: 12 parts, from MOTORAD, CALORSTAT, ACDELCO and 4 other brands. A representative part number is ACDELCO 131160.

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

8 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2018 Chevrolet Express 3500, from FEL-PRO, MAHLE / CLEVITE, APEX and 2 other brands. FEL-PRO 36219 carries the "Popular" badge.

Part numbers include FEL-PRO 36219, FEL-PRO 36106 and FEL-PRO 35720, among others listed above.

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

4 Thermostat Housing / Water Outlet parts for the 2018 Chevrolet Express 3500 come from 4 brands — DORMAN, FOUR SEASONS, GATES and 1 other brand.

The Economy section: 1 option from DORMAN. DORMAN 9022081 is listed in this group.

Standard Replacement: 3 parts, from FOUR SEASONS, GATES and MOTORAD. A representative part number is FOUR SEASONS 85945.

Part numbers include DORMAN 9022081, FOUR SEASONS 85945 and GATES CO34829, among others listed 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

GM GENUINE supplies both parts for the 2018 Chevrolet Express 3500.

This group includes 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

18 Water Pump parts for the 2018 Chevrolet Express 3500 come from 11 brands — FVP, GMB, US MOTOR WORKS and 8 other brands. The "Popular" part is US MOTOR WORKS US6009.

The Economy section: 6 options from US MOTOR WORKS, FVP, SKP and 1 other brand. US MOTOR WORKS US6009 is listed in this group.

Standard Replacement: 11 parts, from GMB, GATES, ACDELCO and 5 other brands. A representative part number is ACDELCO 252901.

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

This table covers the Water Pump & Fan Clutch assemblies. Read more

5 Water Pump & Fan Clutch Assembly parts for the 2018 Chevrolet Express 3500 come from US MOTOR WORKS. The "Popular" part is US MOTOR WORKS MCK1055.

Part numbers include US MOTOR WORKS MCK1055, US MOTOR WORKS MCK1054 and US MOTOR WORKS MCK1054T, 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

13 Water Pump Gasket parts are listed for the 2018 Chevrolet Express 3500, from FEL-PRO, APEX, GM GENUINE and 4 other brands. FEL-PRO ES73010 carries the "Popular" badge.

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

2 Water Pump Seal / O-Ring parts for the 2018 Chevrolet Express 3500 come from 2 brands — APEX and FEL-PRO.

This group includes APEX AWP3151 and FEL-PRO 35633.