2006 Hummer H1 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 are listed for the 2006 Hummer H1, from PRESTONE, PEAK, VALVOLINE 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 1 option from PRESTONE — 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 hard pipes and extra hoses in the coolant circuit. Read more

2 Coolant Hose / Pipe parts are listed for the 2006 Hummer H1, from ACDELCO and GATES.

This group includes ACDELCO 20176S and GATES 21488.

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: MAHLE / CLEVITE 72224.

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

3 Cooling System Tester Adapter parts are listed for the 2006 Hummer H1, from ACDELCO, GATES and MOTORAD.

Part numbers include ACDELCO 12A01, GATES 31413 and MOTORAD 3003.

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 are listed for the 2006 Hummer H1, from GATES, MOTORAD and SKP. MOTORAD T16 carries the "Popular" badge.

The Locking Replacement section lists 2 options from GATES and MOTORAD — grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. GATES 31518 is listed in this group.

The Standard Replacement section: 3 options from MOTORAD, GATES and SKP. MOTORAD T16 is listed in this group.

Part numbers include MOTORAD T16, GATES 31518 and MOTORAD ST16, 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

2 Radiator Hose parts for the 2006 Hummer H1 come from 2 brands — GATES and ACDELCO.

Standard Replacement: 1 part, from GATES. A representative part number is GATES 20685.

In the Universal Hose (Straight, Bulk) grade, ACDELCO supplies 1 part: grouped under the catalog's "Universal Hose (Straight, Bulk)" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO 31011.

Part numbers include GATES 20685 and ACDELCO 31011.

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

8 Temperature Sender / Sensor parts are listed for the 2006 Hummer H1, from STANDARD MOTOR PRODUCTS, NTK, GPD and 3 other brands. NTK EF0008 carries the "Popular" badge.

Economy: 5 parts, from NTK, STANDARD MOTOR PRODUCTS, GPD and 2 other brands. A representative part number is NTK EF0008.

The Standard Replacement section: 3 options from STANDARD MOTOR PRODUCTS and WELLS. STANDARD MOTOR PRODUCTS TX3 is listed in this group.

This group includes NTK EF0008, STANDARD MOTOR PRODUCTS TX3T and GPD 1711697 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

4 Thermostat parts for the 2006 Hummer H1 come from MOTORAD.

Listed part numbers: MOTORAD 448180, MOTORAD 447185 and MOTORAD 447448, 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

10 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2006 Hummer H1, from FEL-PRO, VICTOR REINZ, APEX and 1 other brand. FEL-PRO 35759 carries the "Popular" badge.

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

13 Water Pump parts for the 2006 Hummer H1 come from 8 brands — FVP, SKP, US MOTOR WORKS and 5 other brands. The "Popular" part is ACDELCO 252898.

The Economy section: 9 options from FVP, SKP, US MOTOR WORKS and 3 other brands. AIRTEX AW6053 is listed in this group.

Standard Replacement: 4 parts, from ACDELCO and GMB. A representative part number is ACDELCO 252898.

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 are listed for the 2006 Hummer H1, from VICTOR REINZ, FEL-PRO and MAHLE / CLEVITE. FEL-PRO ES71347 carries the "Popular" badge.

This group includes FEL-PRO ES71347, VICTOR REINZ 181003301 and FEL-PRO 35758 and the remaining 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

3 Water Pump Seal / O-Ring parts for the 2006 Hummer H1 come from 3 brands — APEX, FEL-PRO and MAHLE / CLEVITE.

This group includes APEX AWP3286, FEL-PRO 35756 and MAHLE / CLEVITE K31904.