2007 Hummer H3 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 2007 Hummer H3 come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is FVP MV5050GAL.

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 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 2007 Hummer H3 — FEL-PRO 36017.

This table covers the seals at the Coolant Hose Connector / Flange. 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

ELRING supplies both parts for the 2007 Hummer H3.

Part numbers include ELRING 851630 and ELRING 200060.

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

One part is listed for the 2007 Hummer H3 — AUTOTECNICA GM0718768.

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 2007 Hummer H3, from DORMAN, CALORSTAT, GM GENUINE and 1 other brand. CALORSTAT RC0147 carries the "Popular" badge.

Part numbers include CALORSTAT RC0147, DORMAN 82594 and DORMAN 82724, among others listed above.

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

4 Cooling System Tester Adapter parts for the 2007 Hummer H3 come from 2 brands — GATES and MOTORAD.

This group includes GATES 31431, GATES 31391 and MOTORAD 3128 and the remaining parts above.

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

10 Radiator parts for the 2007 Hummer H3 come from 10 brands — CSF, TYC, DENSO and 7 other brands. The "Popular" part is CSF 3720.

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 2007 Hummer H3 come from 3 brands — ACDELCO, GATES and MOTORAD.

Listed part numbers: 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

4 Radiator Fan Blade parts are listed for the 2007 Hummer H3, from DORMAN, GM GENUINE, GPD and 1 other brand.

Part numbers include DORMAN 621321, GM GENUINE 1580698 and GPD 2812322, among others listed 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

8 Radiator Fan Clutch parts for the 2007 Hummer H3 come from 8 brands — HAYDEN, US MOTOR WORKS, FOUR SEASONS and 5 other brands. The "Popular" part is HAYDEN 2787.

Part numbers include HAYDEN 2787, US MOTOR WORKS 22173 and FOUR SEASONS 36947, among others listed 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

10 Radiator Hose parts are listed for the 2007 Hummer H3, from GATES, ACDELCO, CONTINENTAL and 1 other brand. GATES 22129 carries the "Popular" badge.

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

One part is listed for the 2007 Hummer H3 — ACDELCO 15948095.

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

One part is listed for the 2007 Hummer H3 — GM GENUINE 24501057.

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

9 Temperature Sender / Sensor parts for the 2007 Hummer H3 come from 8 brands — STANDARD MOTOR PRODUCTS, GPD, HOLSTEIN and 5 other brands. The "Popular" part is GM GENUINE 2134233.

The Economy section: 4 options from GPD, HOLSTEIN, STANDARD MOTOR PRODUCTS and 1 other brand. GPD 1712673 is listed in this group.

Standard Replacement: 5 parts, from GM GENUINE, WELLS, NTK and 2 other brands. A representative part number is GM GENUINE 2134233.

This group includes GM GENUINE 2134233, GPD 1712673 and HOLSTEIN 2CTS0045 and the remaining 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

7 Thermostat parts are listed for the 2007 Hummer H3, from SKP, DORMAN, MOTORAD and 4 other brands. SKP SK1511073 carries the "Popular" badge.

Economy: 2 parts, from SKP and DORMAN. A representative part number is SKP SK1511073.

The Standard Replacement section: 5 options from MOTORAD, FOUR SEASONS, GATES and 2 other brands. MOTORAD 538187 is listed in this group.

Listed part numbers: SKP SK1511073, DORMAN 902847 and MOTORAD 538187, plus the other 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

8 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2007 Hummer H3 come from 6 brands — MAHLE / CLEVITE, VICTOR REINZ, FEL-PRO and 3 other brands. The "Popular" part is FEL-PRO 35632.

Part numbers include FEL-PRO 35632, MAHLE / CLEVITE 72141 and APEX AWO2088, among others listed above.

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

4 Thermostat Housing / Water Outlet parts are listed for the 2007 Hummer H3, from DORMAN, GATES, GM GENUINE and 1 other brand.

Economy: 1 part, from DORMAN. A representative part number is DORMAN 902695.

The Standard Replacement section: 3 options from GATES, GM GENUINE and MOTORAD. GATES CO34967 is listed in this group.

Listed part numbers: DORMAN 902695, GATES CO34967 and GM GENUINE 1510715, plus the other 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 2007 Hummer H3, from US MOTOR WORKS, BECK/ARNLEY, FVP and 7 other brands. US MOTOR WORKS US5097 carries the "Popular" badge.

Economy: 5 parts, from US MOTOR WORKS, BECK/ARNLEY, FVP and 2 other brands. A representative part number is US MOTOR WORKS US5097.

The Standard Replacement section: 5 options from GATES, ACDELCO, AISIN and 2 other brands. GATES 41122 is listed in this group.

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

3 Water Pump & Fan Clutch Assembly parts are listed for the 2007 Hummer H3, from FVP, GMB and US MOTOR WORKS.

Listed part numbers: FVP 1300018 and US MOTOR WORKS MCK1049, 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

6 Water Pump Gasket parts for the 2007 Hummer H3 come from 6 brands — FEL-PRO, GM GENUINE, APEX and 3 other brands. The "Popular" part is FEL-PRO 35704.

This group includes FEL-PRO 35704, GM GENUINE 2512029 and APEX AWP3180 and the remaining parts above.