2006 Hummer H2 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 2006 Hummer H2 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 Coolant Air Bleed Hose pipes. Read more

2 Coolant Air Bleed Hose / Pipe parts for the 2006 Hummer H2 come from 2 brands — SKP and DORMAN.

The Economy section: 1 option from SKP. SKP SK626543 is listed in this group.

Standard Replacement: 1 part, from DORMAN. A representative part number is DORMAN 626543.

Part numbers include SKP SK626543 and DORMAN 626543.

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

One part is listed for the 2006 Hummer H2 — GM GENUINE 12602048.

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

2 Coolant Hose / Pipe parts for the 2006 Hummer H2 come from 2 brands — ACDELCO and GM GENUINE.

Listed part numbers: ACDELCO 20192S and GM GENUINE 15058002.

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

2 Coolant Hose / Pipe Seal parts are listed for the 2006 Hummer H2, from DORMAN and ELRING.

Part numbers include DORMAN 56390 and ELRING 868630.

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

This group shows a single part: GM GENUINE 15041309.

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

6 Coolant Reservoir parts are listed for the 2006 Hummer H2, from AUTOTECNICA, DORMAN, GPD and 3 other brands. AUTOTECNICA GM0713009 carries the "Popular" badge.

Listed part numbers: AUTOTECNICA GM0713009, DORMAN 603102 and GPD 2411022, 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

3 Coolant Reservoir Cap parts are listed for the 2006 Hummer H2, from AUTOTECNICA, CALORSTAT and MOTORAD.

Part numbers include AUTOTECNICA GM0613020, CALORSTAT RC0147 and MOTORAD T46.

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

3 Coolant Water Crossover Mounting Set parts for the 2006 Hummer H2 come from 3 brands — FEL-PRO, MAHLE / CLEVITE and VICTOR REINZ.

This group includes FEL-PRO ES73027, MAHLE / CLEVITE GS33845 and VICTOR REINZ 181002301.

This table covers the Cooling Fan control modules. Read more

US MOTOR WORKS supplies the 3 Cooling Fan Control Module parts for the 2006 Hummer H2.

Part numbers include US MOTOR WORKS 16749, US MOTOR WORKS 16789 and US MOTOR WORKS 16795.

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

4 Cooling System Tester Adapter parts for the 2006 Hummer H2 come from 2 brands — GATES and MOTORAD.

Listed part numbers: GATES 31431, GATES 31391 and MOTORAD 3128, plus the other parts above.

This table covers the Hose clamps. Read more

This group shows a single part: GM GENUINE 11570393.

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 for the 2006 Hummer H2 come from 9 brands — OSC, LILAND GLOBAL, KOYORAD and 6 other brands. The "Popular" part is OSC 2423E.

The Economy section: 2 options from OSC and GPD. OSC 2423E is listed in this group.

The Premium (All Aluminum Construction) section lists 2 options from LILAND GLOBAL — a step above OE specification in materials, tolerances or warranty terms. LILAND GLOBAL 2370AA is listed in this group.

Standard Replacement: 11 parts, from KOYORAD, CSF, OSC and 4 other brands. A representative part number is KOYORAD A2370.

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 2006 Hummer H2 come from 2 brands — ACDELCO and GATES.

This group includes ACDELCO RC98 and GATES 31532.

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 2006 Hummer H2, from DORMAN, FOUR SEASONS, GM GENUINE and 1 other brand.

Part numbers include DORMAN 620602, FOUR SEASONS 36893 and GM GENUINE 1580712, 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

7 Radiator Fan Clutch parts for the 2006 Hummer H2 come from 7 brands — FOUR SEASONS, HAYDEN, FVP and 4 other brands. The "Popular" part is FOUR SEASONS 36973.

Listed part numbers: FOUR SEASONS 36973, HAYDEN 2786 and FVP 22158, plus the other 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

8 Radiator Hose parts are listed for the 2006 Hummer H2, from ACDELCO, GATES, CONTINENTAL and 1 other brand. ACDELCO 26390X carries the "Popular" badge.

Listed part numbers: ACDELCO 26390X, GATES 22436 and ACDELCO 22463M, plus the other parts above.

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

19 Temperature Sender / Sensor parts for the 2006 Hummer H2 come from 17 brands — STANDARD MOTOR PRODUCTS, WALKER PRODUCTS, SKP and 14 other brands. The "Popular" part is SKP SKTX89.

The Economy section: 6 options from SKP, DORMAN, GPD and 3 other brands. SKP SKTX89 is listed in this group.

The Full Service Kit section lists 1 option from WALKER PRODUCTS — grouped under the catalog's "Full Service Kit" designation — the notes column spells out what sets them apart. WALKER PRODUCTS 21191118 is listed in this group.

Standard Replacement: 12 parts, from ACDELCO, GM GENUINE, STANDARD MOTOR PRODUCTS and 9 other brands. A representative part number is ACDELCO 2134514.

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

22 Thermostat parts are listed for the 2006 Hummer H2, from MOTORAD, CALORSTAT, GM GENUINE and 5 other brands. MOTORAD 5456187 carries the "Popular" badge.

Economy: 2 parts, from DORMAN and SKP. A representative part number is DORMAN 9022836.

The Heavy Duty section: 2 options from MOTORAD. MOTORAD 5456187 is listed in this group.

In the Performance grade, MOTORAD supplies 1 part: engineered beyond original-equipment specification. A representative part number is MOTORAD MRD104.

The Premium section: 2 options from MOTORAD. MOTORAD 7456187 is listed in this group.

The Standard Replacement section: 15 options from MOTORAD, CALORSTAT, GM GENUINE and 3 other brands. GM GENUINE 131156 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

4 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2006 Hummer H2 come from 4 brands — APEX, FEL-PRO, MAHLE / CLEVITE and 1 other brand.

Part numbers include APEX AWO2229, FEL-PRO 35720 and MAHLE / CLEVITE C31823, among others listed above.

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

6 Thermostat Housing / Water Outlet parts are listed for the 2006 Hummer H2, from DORMAN, AUTOTECNICA, GPD and 3 other brands. DORMAN 902836 carries the "Popular" badge.

Economy: 3 parts, from DORMAN, AUTOTECNICA and GPD. A representative part number is DORMAN 902836.

The Standard Replacement section: 3 options from MOTORAD, FOUR SEASONS and GATES. MOTORAD CH2836 is listed in this group.

Listed part numbers: DORMAN 902836, AUTOTECNICA GM0718508 and GPD 8241539, plus the other parts 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

This group shows a single part: GM GENUINE 131169.

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

16 Water Pump parts are listed for the 2006 Hummer H2, from SKP, US MOTOR WORKS, FVP and 7 other brands. SKP SK1307340 carries the "Popular" badge.

Economy: 6 parts, from SKP, US MOTOR WORKS and FVP. A representative part number is SKP SK1307340.

The Standard Replacement section: 10 options from GATES, GMB, MELLING and 4 other brands. ACDELCO 252845 is listed in this group.

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

4 Water Pump & Fan Clutch Assembly parts are listed for the 2006 Hummer H2, from US MOTOR WORKS, FVP and GMB.

This group includes FVP 1300003 and US MOTOR WORKS MCK1007 and the remaining 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

9 Water Pump Gasket parts for the 2006 Hummer H2 come from 7 brands — FEL-PRO, VICTOR REINZ, GM GENUINE and 4 other brands. The "Popular" part is FEL-PRO ES73010.

Listed part numbers: FEL-PRO ES73010, GM GENUINE 251663 and APEX AWP3016, plus the other parts above.

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

4 Water Pump Seal / O-Ring parts are listed for the 2006 Hummer H2, from APEX, FEL-PRO, MAHLE / CLEVITE and 1 other brand.

Listed part numbers: APEX AWP3151, FEL-PRO 35633 and MAHLE / CLEVITE K31629, plus the other parts above.