How to Replace the Water Pump on a 2018 Cadillac XT5 (DIY Guide)
Step-by-step instructions with required tools, parts list, coolant refill/bleed tips, and safety checks for 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
How to Replace the Water Pump on a 2018 Cadillac XT5 (DIY Guide)
Step-by-step instructions with required tools, parts list, coolant refill/bleed tips, and safety checks for 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
🔧 XT5 - Water Pump Replacement
On your XT5, the water pump circulates coolant through the engine and radiator. Replacing it involves draining coolant, removing the drive belt and a few front-engine components, then installing the new pump and refilling/bleeding the cooling system.
Difficulty Level: Advanced | Estimated Time: 3-5 hours
⚠️ Safety & Precautions
- ⚠️ Let the engine cool fully before opening the coolant reservoir.
- ⚠️ Support the vehicle securely on jack stands before working underneath.
- ⚠️ Coolant is toxic—use a drain pan and clean spills immediately.
- ⚠️ Keep hands/tools clear of the belt path when releasing belt tension.
- ⚠️ Battery disconnect is recommended if you’ll be working near the starter/alternator wiring.
🔧 Required Tools
You'll need the following tools for this repair:
- Floor jack (rated 3-ton minimum)
- Jack stands (rated 3-ton minimum)
- Wheel chocks
- Safety glasses
- Nitrile gloves
- Drain pan (at least 3-gallon)
- Funnel
- 3/8" drive ratchet
- 1/2" drive ratchet
- Socket set (8mm-18mm)
- Extension set (3" and 6")
- Torque wrench (10-150 ft-lbs range)
- Serpentine belt tool (specialty)
- Trim clip removal tool
- Flat-blade screwdriver
- Pliers
- Shop towels
🔩 Required Parts
HowToo sells all the parts you need for this repair:
- Water pump - Qty: 1
- Water pump gasket / seal - Qty: 1
- Dex-Cool coolant (premixed 50/50) - Qty: 2-3 gallons
- Serpentine belt - Qty: 1
- Hose clamp assortment - Qty: 1
📋 Before You Begin
- Park on level ground, set the parking brake, and chock the rear wheels.
- Let the engine cool completely (ideally overnight).
- Plan to capture and properly dispose of old coolant.
- If disconnecting the battery: use a 10mm socket to remove the negative terminal and isolate it so it can’t spring back.
🔨 Step-by-Step Instructions
Follow these steps in order:
Before I give you the exact bolt locations and torque specs for your XT5, I need 2 quick details:
- Is your XT5 FWD or AWD?
- Are you replacing the pump due to a leak or due to an overheating issue?
Those two answers change the best access path and checks.
✅ After Repair
- After refill/bleed, verify the heater blows hot and the engine temperature stays steady.
- Recheck coolant level after the first full heat cycle and top off as needed.
- Inspect for leaks around the pump and hoses with the engine running.
💰 DIY vs Shop Cost
Shop Cost: $850-$1,400 (parts + labor)
DIY Cost: $180-$450 (parts only)
You Save: $670-$950 by doing it yourself!
Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 3-5 hours.
🎯 Ready to get started?
HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.


















