Buy OEM General Motors Part # 22998114. Engine Coolant Reservoir. Sierra, Silverado. W/EASSIST. Engine Coolant Expansion Tank - Repair or Replace A failed expansion tank can

Reservoir. Tank. Assembly - Radiator Surge. Engine Coolant. Recovery.
A container that holds Engine Coolant.

Engine Coolant Reservoir

Fits Sierra 1500, Silverado

Sierra, Silverado. W/EASSIST.
Engine Coolant Expansion Tank - Repair or Replace
A failed expansion tank can cause the cooling system in your to leak antifreeze, or it can cause your engine to overheat. If you're losing coolant, contact our service department to avoid engine damage.