Tomanic AW5104 Water Pump Kit for 4.8L/5.3L/6.0L V8 — Direct-Fit with Thermostat Gasket

This Tomanic kit includes a heavy-duty water pump and matching thermostat gasket designed specifically for Chevy, GMC, Cadillac, Buick, Hummer and select Isuzu applications from the late 1990s to mid-2000s. It’s built to meet the demands of V8 cooling systems, offering a precise physical match to OE mounting points and reliable coolant circulation to maintain stable engine temperatures under everyday and towing loads.

Will this pump fit my Silverado or Tahoe V8?

The AW5104 kit is produced for GM 4.8L, 5.3L and 6.0L V8 engines and covers many model years and trims. Verify fit by matching engine displacement and year range listed for your vehicle or cross-check your factory part number before ordering.

• Compatible models include Chevy Silverado 1500/2500/3500, Tahoe, Suburban, Avalanche and Express
• Also fits GMC Sierra 1500/2500/3500, Yukon, Yukon XL and Savana
• Other fits: Cadillac Escalade, Buick Rainier, Hummer H2, Isuzu Ascender, SAAB 9-7X and selected commercial models

How does the Tomanic pump perform compared with the original equipment piece?

Tomanic pumps are manufactured from quality materials and undergo controlled inspection to deliver consistent coolant flow and long service life. While not labeled OEM, this kit aims to match factory dimensions and operating characteristics for a dependable replacement at a competitive price.

• Robust housing and machined impeller for steady coolant circulation
• Precision bearing and seal assembly to reduce leakage risk
• Engineered to maintain temperature control under load and highway driving

What’s included in the kit and what parts should I check while replacing it?

The kit centers on the water pump and thermostat gasket; it’s wise to inspect nearby components during installation to prevent repeat shop visits. Hardware like bolts, hoses and the thermostat itself may show corrosion or wear and can be replaced to ensure a complete, reliable repair.

• Included: Tomanic AW5104 water pump and matching thermostat gasket
• Recommended to inspect: thermostat, radiator hoses, drive belt, pulleys and coolant condition
• Replace coolant and torque fasteners to factory specifications upon installation

How difficult is installation for a DIY mechanic?

Installation difficulty is moderate and typically requires removal of accessory components for access on many GM V8 vehicles. An experienced DIYer with basic hand tools and a repair manual can complete the job; professional installation is recommended if you lack the necessary tools or experience.

• Tools commonly needed: socket set, torque wrench, coolant drain pan, gasket scraper
• Plan for coolant flush and proper bleed procedures after fitting
• Allow time for inspection of related parts and potential replacement

Who is this for: The Tomanic AW5104 kit is aimed at owners and independent shops working on GM 4.8L/5.3L/6.0L V8 platforms who need a direct-fit, value-minded replacement pump. It’s suitable for drivers restoring older trucks and SUVs, fleet maintenance techs, and home mechanics who prefer a durable aftermarket option that mirrors OE fitment and function without the OEM price tag.