How to replace the auxiliary water pump on a 4.6L (LH2) engine with RPOs V03/V92 on Cadillac STS?

Draining the coolant comes first when replacing the auxiliary water pump on 4.6L units with V03 and V92 RPOs. The Hose Clamp Pliers model J38185 lets you slide the clamp onto the hose and detach the hose from the auxiliary water pump. Afterward put the hose clamp back over the hose while disconnecting the hose from the auxiliary water pump. You need to unplug the auxiliary water pump electrical connection first before you take out the auxiliary water pump by removing its nuts. Install the new auxiliary water pump by placing it into position and tightening its nuts to 9Nm (80 inch lbs). Connect the water pump electrical power connection and put the hose in position onto the auxiliary water pump. Use the Hose Clamp Pliers (J38185) to place the hose clamp back on its original position. Install the hose onto the auxiliary water pump using Hose Clamp Pliers (J38185) by pushing the clamp back to its factory placement on the hose. Finally, fill the coolant.

OEM Cadillac STS Water Pump

H2O Pump

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Cadillac STS Auxiliary Pump
Part Number: 25808860
$151.23 MSRP: $296.08
You Save: $144.85 (49%)
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Product Specifications
- Other Name: Pump, Engine Coolant; Water Pump
- Replaced by: 19436415
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2011 Cadillac STS | Base, Platinum | 6 Cyl 3.6 L GAS
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Cadillac STS Water Pump
Part Number: 12595614
$146.43 MSRP: $284.20
You Save: $137.77 (49%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pump, Water; Pump, Engine Coolant
- Replaces: 12563631
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2010 Cadillac STS | Base, Platinum, V | 8 Cyl 4.4 L GAS, 8 Cyl 4.6 L GAS
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Cadillac STS Auxiliary Pump
Part Number: 25746579
$131.74 MSRP: $236.30
You Save: $104.56 (45%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Pump, Engine Coolant; Water Pump
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2007 Cadillac STS | Base | 8 Cyl 4.6 L GAS
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Cadillac STS Water Pump
Part Number: 12566029
Product Specifications
- Other Name: Pump, Water; Oil Pump
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2007 Cadillac STS | Base | 6 Cyl 3.6 L GAS
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Cadillac STS Water Pump
Part Number: 12709178
$208.24 MSRP: $373.52
You Save: $165.28 (45%)
Product Specifications
- Other Name: Pump Kit-Water; Water Pump Assembly; Pump Kit, Engine Coolant
- Replaces: 12645176, 12637479, 12618472, 12657499
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2011 Cadillac STS | Base, Platinum | 6 Cyl 3.6 L GAS

Cadillac STS Water Pump

Our website offers an extensive catalog of genuine Cadillac STS Water Pump at unbeatable prices. Every OEM Cadillac STS Water Pump comes with a manufacturer's warranty, an easy return policy, and rapid delivery service. Don't miss out on this great opportunity!

Cadillac STS Water Pump Parts Questions & Experts Answers

Water Pump
12595614
Q: How to replace the auxiliary water pump on a 4.6L (LH2) engine with RPOs V03/V92 on Cadillac STS?
A: Draining the coolant comes first when replacing the auxiliary water pump on 4.6L units with V03 and V92 RPOs. The Hose Clamp Pliers model J38185 lets you slide the clamp onto the hose and detach the hose from the auxiliary water pump. Afterward put the hose clamp back over the hose while disconnecting the hose from the auxiliary water pump. You need to unplug the auxiliary water pump electrical connection first before you take out the auxiliary water pump by removing its nuts. Install the new auxiliary water pump by placing it into position and tightening its nuts to 9Nm (80 inch lbs). Connect the water pump electrical power connection and put the hose in position onto the auxiliary water pump. Use the Hose Clamp Pliers (J38185) to place the hose clamp back on its original position. Install the hose onto the auxiliary water pump using Hose Clamp Pliers (J38185) by pushing the clamp back to its factory placement on the hose. Finally, fill the coolant.