Sonnax Allison 1000 Pump Body

Professional-grade pump body assembly for the Allison 1000 series transmission. This Sonnax reconditioned pump body is engineered for the demanding requirements of the Allison pump and clutch apply system. Proper hydraulic component function is essential for reliable shifting and clutch engagement under the heavy torque loads generated by the Duramax diesel engine.

Fits 2001-2019 Chevrolet Silverado and GMC Sierra 2500HD and 3500HD with Allison 1000 transmission. Precision-manufactured to Allison specifications for exact fitment and consistent performance.