How to service and repair a water pump on Chevrolet Express 3500?

Being safe while working on the Water Pump means disconnecting the battery negative cable from the battery terminal first. First take off the air cleaner, let all engine coolant drain out then remove the air intake duct from the Throttle Body. Take out the coolant recovery reservoir while you remove both the upper Fan Shroud and the Fan Clutch segment. First disconnect the Drive Belt from its route on the pulleys. Then you should remove the bolts that secure the Water Pump Pulley to the Water Pump assembly. Remove all hoses attached to the Water Pump before taking out the Water Pump mounting bolts and the gasket with the pump. Check if the engine block and Water Pump bolts have damaged threads during restoration. Before installation insert the gaskets and Water Pump while applying gm p/n 12346004 (thread sealant) to the Water Pump mounting bolts. Tighten these bolts to 45 nm [33 ft. Lbs]. Plug in the Water Pump connections to the lower Radiator Hose, heater outlet hose, and by-pass hose before fastening its rotating component with 25 nm (18 ft lbs) torque. Place the Drive Belt first then add the Fan Clutch followed by upper Fan Shroud and finally install the coolant recovery reservoir air duct to Throttle Body and air cleaner assembly. Attach the battery negative terminal last while using proper testing tools to eliminate all air from the cooling system. Also test the system for any leaks afterward.

OEM Chevrolet Express 3500 Water Pump

H2O Pump

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13 Water Pumps found

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Chevrolet Express 3500 Water Pump Part Number: 12637105
$260.71 MSRP: $482.35
You Save: $221.64 (46%)
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Product Specifications
- Other Name: Pump, Engine Coolant
- Replaces: 98098889, 97372515, 98031233
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2016 Chevrolet Express 3500 | Base, LS, LT | 8 Cyl 6.6 L DIESEL
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Chevrolet Express 3500 Water Pump Part Number: 89060527
$232.95 MSRP: $456.07
You Save: $223.12 (49%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Kit, Water; Water Pump Assembly; Pump Kit, Engine Coolant
- Replaces: 12528917, 89017748, 12532528
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2002 Chevrolet Express 3500 | Base, LS | 6 Cyl 4.3 L GAS, 8 Cyl 5.7 L BI-FUEL, 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS, 8 Cyl 7.4 L GAS
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Chevrolet Express 3500 Water Pump Part Number: 12703898
$187.62 MSRP: $364.18
You Save: $176.56 (49%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pump Kit-Water *Use Together With Gask; Pump Kit, Engine Coolant
- Replaces: 12681184, 12686763, 19256261
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2006 Chevrolet Express 3500 | Base, LS, LT | 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
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Chevrolet Express 3500 Water Pump Part Number: 12681417
$289.52 MSRP: $561.92
You Save: $272.40 (49%)
ADD TO CART
Product Specifications
- Other Name: Pump Kit-Water; Pump Kit, Engine Coolant
- Replaced by: 19434033
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2020 Chevrolet Express 3500 | Base, LS, LT | 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
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Chevrolet Express 3500 Water Pump Part Number: 19168610
$223.61 MSRP: $433.95
You Save: $210.34 (49%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Pump Kit, Water; Water Pump Assembly; Pump Kit, Engine Coolant
- Replaces: 12534772, 12530176, 88894036
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-1998 Chevrolet Express 3500 | Base, LS | 8 Cyl 6.5 L DIESEL
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Chevrolet Express 3500 Water Pump Part Number: 19168609
$249.47 MSRP: $484.18
You Save: $234.71 (49%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Pump Kit, Water; Pump Kit, Engine Coolant
- Replaces: 88894035, 12456231
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2002 Chevrolet Express 3500 | Base, LS | 8 Cyl 6.5 L DIESEL
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Chevrolet Express 3500 Water Pump Part Number: 12725728
$282.59 MSRP: $553.28
You Save: $270.69 (49%)
ADD TO CART
Product Specifications
- Other Name: Pump, Engine Coolant
- Replaced by: 12735409
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2023 Chevrolet Express 3500 | Base, LS, LT | 8 Cyl 6.6 L GAS
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Chevrolet Express 3500 Water Pump Part Number: 12708487
$171.67 MSRP: $508.16
You Save: $336.49 (67%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Pump Kit-Water; Pump Kit, Engine Coolant
- Replaces: 12456326, 12527759, 19168601
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2000 Chevrolet Express 3500 | Base, LS | 8 Cyl 7.4 L GAS
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Chevrolet Express 3500 Water Pump Part Number: 12707676
$166.89 MSRP: $493.96
You Save: $327.07 (67%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Water Pump Assembly
- Replaced by: 12740339
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2024 Chevrolet Express 3500 | Base, LS, LT | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS
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Chevrolet Express 3500 Water Pump Part Number: 12645126
$168.76 MSRP: $327.52
You Save: $158.76 (49%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Pump, Engine Coolant
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2017-2022 Chevrolet Express 3500 | Base, LS, LT | 4 Cyl 2.8 L DIESEL
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Chevrolet Express 3500 Water Pump Part Number: 89018166
Product Specifications
- Other Name: Pump Kit, Water; Water Pump Assembly
- Replaces: 12458935, 12456113, 88894290, 89017439, 89018040
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2007 Chevrolet Express 3500 | Base, LS, LT | 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
View related parts
Chevrolet Express 3500 Water Pump Part Number: 12685964
Product Specifications
- Other Name: Pump Kit-Water; Pump Kit, Engine Coolant
- Replaces: 89017773, 89017694, 88893907
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2002 Chevrolet Express 3500 | Base, LS | 8 Cyl 8.1 L GAS
View related parts
Chevrolet Express 3500 Water Pump Part Number: 12600767
Product Specifications
- Other Name: Pump, Water; Engine Water Pump; Water Pump Assembly
- Replaces: 12587305
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2010 Chevrolet Express 3500 | Base, LS, LT | 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS

Chevrolet Express 3500 Water Pump

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Chevrolet Express 3500 Water Pump Parts Questions & Experts Answers

Water Pump
89060527
Q: How to service and repair a water pump on Chevrolet Express 3500?
A:
Being safe while working on the Water Pump means disconnecting the battery negative cable from the battery terminal first. First take off the air cleaner, let all engine coolant drain out then remove the air intake duct from the Throttle Body. Take out the coolant recovery reservoir while you remove both the upper Fan Shroud and the Fan Clutch segment. First disconnect the Drive Belt from its route on the pulleys. Then you should remove the bolts that secure the Water Pump Pulley to the Water Pump assembly. Remove all hoses attached to the Water Pump before taking out the Water Pump mounting bolts and the gasket with the pump. Check if the engine block and Water Pump bolts have damaged threads during restoration. Before installation insert the gaskets and Water Pump while applying gm p/n 12346004 (thread sealant) to the Water Pump mounting bolts. Tighten these bolts to 45 nm [33 ft. Lbs]. Plug in the Water Pump connections to the lower Radiator Hose, heater outlet hose, and by-pass hose before fastening its rotating component with 25 nm (18 ft lbs) torque. Place the Drive Belt first then add the Fan Clutch followed by upper Fan Shroud and finally install the coolant recovery reservoir air duct to Throttle Body and air cleaner assembly. Attach the battery negative terminal last while using proper testing tools to eliminate all air from the cooling system. Also test the system for any leaks afterward.