A-Premium Aluminum Engine Coolant Thermostat Housing Assembly — Direct-Fit Replacement for GM Vehicles, Corrosion-Resistant

The A-Premium Upgraded Aluminum Engine Coolant Thermostat Housing Assembly is a direct-fit replacement thermostat housing designed to restore reliable engine cooling for many GM and related vehicles.

This heavy-duty aluminum thermostat housing assembly replaces worn or cracked factory housings and helps maintain proper coolant flow in compatible Chevrolet, GMC, Cadillac, Buick, Hummer, Isuzu, Pontiac, Saab and Workhorse models. Built from upgraded materials and finished to resist corrosion, the unit comes prepped with mounting points and ports to match OEM specifications so installation is straightforward for experienced DIYers or professional technicians.

Which vehicles will this thermostat housing assemble fit?

This assembly covers a broad range of General Motors and partner-brand vehicles across model years. Fitment includes numerous Chevrolet full-size trucks and SUVs, GMC pickups and vans, several Cadillac and Buick V8/V6 models, plus certain Hummer, Isuzu, Pontiac, Saab and Workhorse chassis applications. Always verify compatibility by checking the supplied reference numbers and your vehicle’s year, engine displacement and factory part location.

• Compatible with Chevrolet models such as Silverado, Tahoe, Suburban, Avalanche, Camaro, Corvette, Express, Impala and more (years listed in product details).
• Covers GMC Sierra, Yukon, Envoy, Savana, and heavy-duty variants across the listed model years.
• Includes Cadillac CTS, Escalade families, Buick LaCrosse/Allure, Pontiac G8/GTO/Grand Prix, Hummer H2 and select Isuzu applications.
• Workhorse and FasTrack chassis fitments for vocational and motorhome platforms are included in the compatibility list.

How does this upgraded aluminum housing improve cooling system durability?

Manufactured from aluminum with corrosion-resistant finishes, the housing reduces the chance of cracking and coolant leakage compared with many aging plastic housings. The material choice improves heat dissipation and resists warping under thermal cycles, supporting longer-term service life when correctly installed and maintained.

• Aluminum construction resists thermal stress and cracking common in plastic housings.
• OEM-style mounting and port locations ensure a secure, leak-minimizing fit.
• Chemical-resistant surface finish helps prevent corrosion from coolant exposure.

What do I need to know before installation?

Prepare basic hand tools, a drain pan, replacement gasket or O-ring (if not supplied), and new coolant for a proper service. Confirm engine is cool, drain coolant to a safe level, and follow torque specs for mounting bolts—tightening too loosely or too tightly can cause leaks or damage. If your vehicle has related sensors or hoses attached to the housing, inspect and replace those parts as needed to ensure a complete repair.

• Verify the vehicle year, engine size and reference numbers before ordering.
• Have replacement coolant, gasket/O-ring, and possibly new hose clamps ready.
• Follow manufacturer torque specs and bleed the cooling system after installation.

What reference numbers and warranty information should I check?

This part lists several cross-reference numbers used by OEM and aftermarket suppliers to help confirm fitment. Compare those numbers to your existing part and your vehicle’s parts diagram when possible. A-Premium backs this assembly with a one-year unlimited-mileage guarantee to cover manufacturing defects under normal use.

• Cross-reference examples: 902-2836, 524KT, 86220, 1511057, 12600172, 12568911 and related numbers.
• One-year unlimited-mileage warranty protects against manufacturing defects.
• Keep your receipt and order information for warranty service or returns.

Who is this for: The A-Premium Upgraded Aluminum Thermostat Housing Assembly is intended for owners, mechanics and fleet managers who need a robust, direct-fit replacement for failed, cracked or leaking thermostat housings on compatible GM-based vehicles. It’s a practical option for those wanting a metal upgrade over aging plastic housings and for technicians performing cooling system repairs on trucks, SUVs, vans and vocational chassis listed in the fitment details.