2006 Cadillac CTS 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

16 Coolant / Antifreeze parts are listed for the 2006 Cadillac CTS, from PRESTONE, PEAK, VALVOLINE and 3 other brands. FVP MV5050GAL carries the "Popular" badge. All of them fit every engine offered in the 2006 CTS.

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 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

2 Coolant Air Bleed Hose / Pipe parts are listed for the 2006 Cadillac CTS, from DORMAN and GATES.

Part numbers include DORMAN 626592 and GATES HHA146.

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

3 Coolant Hose / Pipe parts are listed for the 2006 Cadillac CTS, from CONTINENTAL, DAYCO and GATES.

Listed part numbers: CONTINENTAL 61267, DAYCO 71709 and GATES 24527.

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

3 Coolant Hose / Pipe Seal parts for the 2006 Cadillac CTS come from 2 brands — ELRING and GM GENUINE. 2 parts fit every engine; the other 1 is engine-specific.

Listed part numbers: ELRING 943630, ELRING 868630 and GM GENUINE 12623519.

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

This group shows a single part: ELRING 943020.

This table covers the gaskets that seal the Coolant Pipe. 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: AJUSA 01154600.

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

3 Coolant Reservoir parts for the 2006 Cadillac CTS come from 2 brands — TECHPRO and DORMAN. Every part fits all 3 engine options (2.8L V6, 3.6L V6 and 6.0L V8).

Listed part numbers: DORMAN 603099, TECHPRO GM3014158 and TECHPRO GM3014159.

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 for the 2006 Cadillac CTS come from 3 brands — AUTOTECNICA, GM GENUINE and MOTORAD. Every part fits all 3 engine options (2.8L V6, 3.6L V6 and 6.0L V8).

This group includes AUTOTECNICA GM0613026, GM GENUINE 15076936 and MOTORAD T46.

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

3 Coolant Water Crossover Mounting Set parts are listed for the 2006 Cadillac CTS, from FEL-PRO, MAHLE / CLEVITE and VICTOR REINZ.

Part numbers include FEL-PRO ES73027, MAHLE / CLEVITE GS33845 and VICTOR REINZ 181002301.

This table covers the Cooling Fan control modules. Read more

3 Cooling Fan Control Module parts for the 2006 Cadillac CTS come from US MOTOR WORKS.

This group includes 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 are listed for the 2006 Cadillac CTS, from GATES and MOTORAD. All of them fit every engine offered in the 2006 CTS.

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

11 Radiator parts are listed for the 2006 Cadillac CTS, from ULTRA-POWER, GPD, CSF and 8 other brands. ULTRA-POWER 2731 carries the "Popular" badge. 6 parts fit every engine; the other 5 are engine-specific.

Economy: 2 parts, from ULTRA-POWER and GPD. A representative part number is ULTRA-POWER 2731.

The Standard Replacement section: 9 options from CSF, KOYORAD, SPECTRA PREMIUM and 6 other brands. CSF 3571 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

2 Radiator Cap parts are listed for the 2006 Cadillac CTS, from ACDELCO and GATES. All of them fit every engine offered in the 2006 CTS.

Part numbers include ACDELCO RC116 and GATES 31532.

This table covers the fan assemblies (and clutches, where listed) that pull air through the radiator. Read more

10 Radiator Fan Assembly parts for the 2006 Cadillac CTS come from 7 brands — TECHPRO, UAC, DORMAN and 4 other brands. The "Popular" part is DORMAN 621101. 3 parts fit every engine; the other 7 are engine-specific.

The Economy section: 5 options from TECHPRO, DORMAN and GPD. DORMAN 621101 is listed in this group.

Standard Replacement: 5 parts, from UAC, TYC, FOUR SEASONS and 1 other brand. A representative part number is TYC 623460.

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

15 Radiator Hose parts for the 2006 Cadillac CTS come from 4 brands — ACDELCO, CONTINENTAL, GATES and 1 other brand. The "Popular" part is ACDELCO 20417S.

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

5 Radiator Upper Air Baffle Retainer / Clip parts for the 2006 Cadillac CTS come from DORMAN. The "Popular" part is DORMAN 700579. 2 parts fit every engine; the other 3 are engine-specific.

Part numbers include DORMAN 700579, DORMAN 961359 and DORMAN 700061, among others listed 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

35 Temperature Sender / Sensor parts are listed for the 2006 Cadillac CTS, from STANDARD MOTOR PRODUCTS, WALKER PRODUCTS, NTK and 16 other brands. SKP SKTX89 carries the "Popular" badge. They are grouped as Economy, Full Service Kit and Standard Replacement, with Standard Replacement the largest group at 23 parts from STANDARD MOTOR PRODUCTS, NTK, BOSCH and 9 other brands.

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

27 Thermostat parts for the 2006 Cadillac CTS come from 9 brands — MOTORAD, CALORSTAT, GATES and 6 other brands. The "Popular" part is MOTORAD 5456187. They are grouped as Economy, Heavy Duty, Performance, Premium and Standard Replacement, with Standard Replacement the largest group at 19 parts from MOTORAD, CALORSTAT, GATES and 4 other brands.

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

31 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2006 Cadillac CTS, from FEL-PRO, MAHLE / CLEVITE, GM GENUINE and 4 other brands. FEL-PRO 35855 carries the "Popular" badge. The notes list position, dimensions and spec qualifiers wherever the manufacturer distinguishes between variants.

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

6 Thermostat Housing / Water Outlet parts for the 2006 Cadillac CTS come from 6 brands — AUTOTECNICA, DORMAN, GPD and 3 other brands. The "Popular" part is MOTORAD CH2836.

The Economy section: 3 options from AUTOTECNICA, DORMAN and GPD. AUTOTECNICA GM0718508 is listed in this group.

Standard Replacement: 2 parts, from MOTORAD and FOUR SEASONS. A representative part number is MOTORAD CH2836.

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

Part numbers include MOTORAD CH2836, AUTOTECNICA GM0718508 and DORMAN 902836, among others listed 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

25 Water Pump parts for the 2006 Cadillac CTS come from 15 brands — US MOTOR WORKS, SKP, FVP and 12 other brands. The "Popular" part is BECK/ARNLEY 1312378.

The Economy section: 13 options from US MOTOR WORKS, SKP, FVP and 5 other brands. BECK/ARNLEY 1312378 is listed in this group.

Standard Replacement: 12 parts, from ACDELCO, GATES, GM GENUINE and 4 other brands. A representative part number is ACDELCO 252921.

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

15 Water Pump Gasket parts are listed for the 2006 Cadillac CTS, from FEL-PRO, VICTOR REINZ, APEX and 6 other brands. FEL-PRO 35859 carries the "Popular" badge.

This table covers the Water Pump pulleys. Typical signs include a growl or chirp that follows engine speed, or a pulley that will not spin freely by hand. Spin each pulley with the belt off. Roughness or play means replace it with the belt. Read more

One part is listed for the 2006 Cadillac CTS — GM GENUINE 12611587.

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

5 Water Pump Seal / O-Ring parts for the 2006 Cadillac CTS come from 5 brands — APEX, FEL-PRO, GM GENUINE and 2 other brands.

Listed part numbers: APEX AWP3151, FEL-PRO 35633 and GM GENUINE 12691259, plus the other parts above.

This table covers the Water Pump Stud kits. Read more

3 Water Pump Stud Kit parts for the 2006 Cadillac CTS come from ARP.

This group includes ARP 1343201, ARP 4343202 and ARP 1343202.