GMC S15 Water Pump Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(4)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(4)

Water Pump Replacement Service

How much does a Water Pump Replacement cost?

On average, the cost for a GMC S15 Water Pump Replacement is $242 with $102 for parts and $140 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1990 GMC S15L4-2.5LService typeWater Pump ReplacementEstimate$507.56Shop/Dealer Price$581.73 - $792.07
1990 GMC S15V6-4.3LService typeWater Pump ReplacementEstimate$495.43Shop/Dealer Price$567.29 - $776.68
1990 GMC S15V6-2.8LService typeWater Pump ReplacementEstimate$564.66Shop/Dealer Price$636.55 - $843.85
Show example GMC S15 Water Pump Replacement prices

What is a water pump and how does it work?

The water pump is a belt or chain-driven engine accessory bolted to the engine above the crankshaft pulley. The pump housing has an impeller that circulates engine coolant through the cooling system passageways in the engine block and cylinder head, on to the radiator, where the coolant temperature is reduced. . The lower temperature coolant then flows back to the water inlet on the engine and the water pump continues the cycle.

When to consider replacing the water pump:

  • Coolant leaks or overheating. The water pump impeller shaft is supported by a bearing. Eventually, the bearing or seal can wear and leak or damage the impeller. Many water pumps have weep holes near the pump bearing. If you see significant leakage from that weep hole, it is time to replace the pump.
  • Bearing roughness or noise. If the water pump shaft does not turn smoothly or the pump is noisy, the bearing is excessively worn. Pump replacement will be necessary.
  • Timing belt replacement. In engines where the water pump is driven by the timing belt, it is a good idea to replace the water pump at the same time the timing belt is replaced. The extensive work explains why it is always recommended to replace the water pump whenever the mechanic already has these components removed for regularly scheduled timing belt replacement.

How do mechanics replace the water pump?

  • The water pump is usually bolted to the front of the engine. The replacement procedure will vary depending on whether the pump is driven by the timing belt, the serpentine belt, or chain.
  • On a cold engine, the engine coolant is drained to a level below the water pump.
  • Components that require removing to access the water pump are removed, including the belt or chain that directly drive the pump.
  • The bolts holding the pump to the engine are removed and the pump is pulled out.
  • The gasket surface must be cleaned and the pump mounting surface inspected. A new gasket, rubber seal, or RTV sealant, as required, is installed and then the new pump. The bolts are torqued in sequence using a calibrated inch pound torque wrench.
  • For applications where the water pump is driven by the timing belt, the timing belt must be removed. Typically, this requires removal of the crankshaft pulley, timing belt covers, and timing belt tensioner. Once the new pump is installed, new coolant is added back while bleeding the cooling system of any air. The engine is then run and brought to normal operating temperature to check for leaks and ensure normal operating temperature.

Is it safe to drive with a water pump problem?

No. Should the water pump only leak a little bit, you can drive the car. However, a small leak could suddenly enlarge or the pump bearing might unexpectedly seize. Either circumstance would likely cause engine overheating. If a defective water pump causes the overheating, it is not safe to drive because of the damage to the engine.

When replacing the water pump keep in mind:

  • It is best to install a new cooling system thermostat when you install a new water pump, especially if the thermostat is old or original.
  • Completely flushing the cooling system is a good idea when you replace the water pump. Flushing can be done before or after pump replacement.
  • The rest of the cooling system should be inspected too — particularly rubber hoses, which have a limited lifetime.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert GMC mechanics

Real customer reviews from GMC owners like you.

Excellent Rating

(4)

Rating Summary
4
0
0
0
0
4
0
0
0
0

Colby

15 years of experience
66 reviews
Colby
15 years of experience
GMC S15 V6-2.8L - Car is overheating - Denver, Colorado
Colby was early and got right to work. Finished quickly and patiently explained issues and solutions.

Johnathon

10 years of experience
171 reviews
Johnathon
10 years of experience
GMC S15 V6-4.3L - Tune-up - Fresno, California
Explained everything easily. Didn't seem to be in a rush, and got my vehicle in order. Thank you, Thank you, Thank you!

Timothy

23 years of experience
107 reviews
Timothy
23 years of experience
GMC S15 V6-2.8L - Valve Cover Gasket - Tacoma, Washington
He's great!

Johnathon

10 years of experience
171 reviews
Johnathon
10 years of experience
GMC S15 V6-2.8L - Air Shocks Replacement (Rear) - Clovis, California
Very good and efficient.

Excellent Rating

(4)

Rating Summary
4
0
0
0
0
4
0
0
0
0
Number of GMC S15 services completed
44+
services done by our mechanics
TOTAL NUMBER OF EXPERT GMC MECHANICS
900+
experts on our platform

Recent articles & questions

P0013 OBD-II Trouble Code: B Camshaft Position - Open or Short in Oil Control Valve (OCV) (Bank 1)
P0013 code definition “B” Camshaft Position - Open or Short in Oil Control Valve (OCV) (Bank 1) What the P0013 code means...
P0873 OBD-II Trouble Code: Transmission Fluid Pressure Sensor/Switch C Circuit High
P0873 means the transmission fluid pressure level is abnormal due to Dirty, contaminated or burnt transmission fluid, or a faulty transmission system.
How to Deal With Glare While Driving at Night
Driving Driving at night (https://www.yourmechanic.com/article/how-to-drive-your-vehicle-safely-at-night-by-cheryl-knight) is hard enough without having to deal with glare. Glare is usually caused by dirty windows or mirrors, bad vision, and the improper use of lights by other drivers. Luckily, you can take some steps...

My car stops when engine gets warm and while I am driving I stop on red light and car suddenly turn off and I have to hit starter

Hello, from what you've described it sounds like you are having several different issues. The starter should have nothing to do with it stalling, but it will have something to do with the car restarting if it doesn't turn the...

When power steering pump cap is removed should there be a slight presure release

You should have the power steering reservoir cap checked to make sure the vent on cap is not blocked. Also make sure the system is bled of excessive air in the system. Once these two things are checked then you...

I need to figure out if my power switch is failing or is it my power window motor, driver side

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com