The best LS truck water pump depends on your engine, model year, and whether you want a pump alone or a kit with a thermostat and gasket. ACDelco Gold is a straightforward choice for buyers prioritizing tested performance and coated seals; OAW and A-Premium include installation components and list extensive fitment details; Gates emphasizes OE-specification performance and leakage testing. BDELI is another option with numerous cross-reference part numbers. Confirm exact vehicle fitment before ordering.
| Product | Best For | Notable Detail |
|---|---|---|
| ACDelco Gold 252-845 | Buyers seeking a tested pump | Coated seals |
| OAW G7341B | Buyers wanting included parts | Thermostat and gasket included |
| A-Premium Water Pump | Shoppers checking detailed fitment | Broad listed vehicle coverage |
| Gates 45005 | Buyers comparing OE-spec pumps | Leakage and function testing |
| BDELI 45005 AW5087 | Buyers cross-referencing part numbers | Multiple replacement numbers listed |
ACDelco Gold 252-845 Engine Water Pump
ACDelco Gold 252-845 is best for buyers who want a replacement pump from an established GM parts brand and do not need a bundled thermostat. The listing says the pump is thoroughly tested for reliable, leak-free performance and uses coated seals intended to support seal longevity and durability. It is identified by part number 19195104, which is also referenced by other listings in this selection.
Choose this option if a pump-only purchase suits your repair and the part number matches your application. Its listing says All Makes water pumps fit GM vehicles and a range of non-GM vehicles, but that broad statement is not a substitute for checking the exact engine and vehicle. Limitation: A thermostat and gasket are not listed as included.
OAW G7341B Pump With Thermostat
OAW G7341B is best for owners who want a water pump, thermostat, and gasket listed together. The product description identifies it for GM 4.8L, 5.3L, and 6.0L applications and provides vehicle-year fitment details for models including Silverado, Sierra, Tahoe, Yukon, Express, and Savana. Its stated OE-original fitment and performance positioning may help shoppers compare it with pump-only options.
Choose this kit if the listed vehicle and engine match your truck and you want the included thermostat and gasket for the repair. The fitment list covers particular model years and engine sizes, not every LS-powered vehicle. Limitation: Verify the exact year, model, and engine; a shared engine family alone does not confirm fitment.
A-Premium Pump With Thermostat And Gasket
A-Premium is best for buyers who want a bundled pump kit and a detailed vehicle-fitment list to compare against their truck. The listing includes the thermostat and gasket in the product name and describes coverage across many Chevy and GMC vehicles, including Silverado, Sierra, Tahoe, Yukon, Suburban, and Savana variants. It also lists some Workhorse applications, such as W3500 and W4500 models.
Choose this option when its specific engine and model-year entries match your vehicle. The extensive list can be useful when checking less common configurations, but it should be read carefully because coverage varies by vehicle and engine. Limitation: The listing separates fitment by engine and model year; do not rely on a general “GM compatible” description.
Gates 45005 Premium Water Pump
Gates 45005 is best for buyers comparing a pump described as meeting OE specifications and requirements. The listing identifies an aluminum construction and says seals, bearings, castings, and the fully assembled pump undergo 100 percent leakage and functional testing. It also describes the premium pump as designed to enhance performance compared with the equivalent standard pump.
Choose Gates if those stated testing and specification details are important in your comparison and the part number matches your application. Limitation: The provided product information does not list a thermostat or gasket as included, so check the package details if you need those components.
BDELI 45005 AW5087 Replacement Pump
BDELI is best for shoppers who identify a replacement by cross-reference part number. Its listing includes 45005, AW5087, AW5104, 252-845, and multiple GM-related numbers, and describes applications for 1999–2006 Chevy, GMC, and Cadillac vehicles with 4.8L, 5.3L, and 6.0L engines. It also states that the manufacturer uses quality-control standards and factories certified to ISO 9001 and IATF 16949.
Choose this pump if one of the listed numbers matches the part you are replacing and the vehicle application checks out. Limitation: The long cross-reference list does not guarantee fitment for every vehicle using those engine sizes; confirm the exact application before purchase.
Buying Guide: How To Choose An LS Truck Water Pump
How do you confirm the pump fits your truck?
Match the vehicle year, make, model, engine displacement, and any relevant trim or chassis details against the product’s fitment information. If you have the original pump, compare its part number with the replacement’s listed numbers. Do not select a pump based only on the phrase “LS truck” or engine size.
Should you buy a pump-only part or a kit?
A pump-only listing may suit a repair when the needed supporting parts are already available. OAW and A-Premium explicitly include a thermostat and gasket, so they may be more convenient when those components are also needed. Check the package contents rather than assuming every pump includes installation parts.
Which product details matter most?
- Fitment: Exact model year and engine application take priority over broad compatibility claims.
- Part numbers: Cross-reference numbers can help confirm a match, but should be checked against the vehicle.
- Testing and seals: ACDelco describes testing and coated seals; Gates describes leakage and functional testing.
- Included components: Confirm whether a thermostat and gasket are part of the listed package.
Frequently Asked Questions
Are all LS truck water pumps interchangeable?
No. Fitment depends on the vehicle, model year, engine, and the pump’s application. Confirm these details before ordering.
Does a water pump listing include a thermostat?
Not necessarily. OAW and A-Premium list a thermostat and gasket, while the provided ACDelco and Gates details do not identify those items as included.
What does 252-845 mean?
It is a water pump part number used in product listings, including the ACDelco Gold and OAW products here. Match it to your specific vehicle application before relying on it.
Can I choose a pump by engine size alone?
No. Several listings cover multiple 4.8L, 5.3L, and 6.0L applications, but fitment still varies by vehicle and year.
What should I compare when replacing an existing pump?
Compare the original part number, vehicle fitment, included components, and any listed testing or seal details with the replacement listing.