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An inoperative pump can cause increased steering effort, and in hydro-boost equipped vehicles also increased braking effort, but does not completely eliminate the ability to steer or slow the vehicle.

Power Train — Driveline — Driveshaft

Some pickup trucks, vans, and sport utility vehicles equipped with a hydraulic pump driveshaft that can fracture, resulting in immediate loss of hydraulic power steering assist. On certain vehicles equipped with hydro-boost power brakes, the same condition can result in loss of power assist for braking after the reserve pressure is depleted.
Dealers will replace the hydraulic pump. The campaign began on February 14, 2005. Owners may contact Chevrolet at 1-800-630-2438 or GMC at 1-866-996-9463.
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Date Announced
JAN 07, 2005
Vehicles Affected
Chevrolet Recall #
NHTSA Campaign #
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