GM Saginaw Power Steering Pump Pulley, 1/2" Single-Groove Aluminum - Black

• 1/2" single-groove aluminum pulley for GM Saginaw power steering pumps

• Keyed 5/8" bore mounts to standard-drive Saginaw shafts, not press-fit

• Sized for wider 1/2" V-belt accessory drives on small/big block Chevy builds

• Black billet aluminum finish, 5.750" OD, sold individually

This is a black billet aluminum single-groove pulley built for GM Saginaw power steering pumps with a 5/8" keyed shaft, sized for 1/2" wide V-belts. It bolts onto Saginaw P-series pumps used across GM accessory drive systems running a 1/2" belt, including small block and big block Chevy setups.

This pulley is a common replacement for a worn, cracked, or wrong-width pulley, and is also used when building a fresh Saginaw pump drive on street rod, hot rod, restoration, and custom accessory drive builds. It's commonly paired with Saginaw pumps found on Camaro, Chevelle, Nova, C10/C20, and GMC C/K trucks running a standard-drive (non-underdrive, non-overdrive) 1/2" belt setup.

This is a standard-drive pulley only — not underdrive or overdrive — and it is not compatible with press-fit Saginaw pump shafts or GM Type II (TC) power steering pumps. Confirm belt width, shaft type, and pulley offset before ordering, since this pulley is sized for 1/2" belts and will not properly seat a 3/8" belt. Hardware is not included. Sold individually.

Billet Aluminum Pulley Sized for 1/2" V-Belt Drives
Machined from black billet aluminum with a single-groove design, this pulley is built to mount on the keyed 5/8" shaft used by GM Saginaw power steering pumps, sized specifically for 1/2" wide V-belts — the wider belt spec used on many small and big block Chevy accessory drives.

Right Belt Width Prevents Slip, Squeal, and Premature Wear
Running the wrong belt width on a power steering pulley can cause slipping, squealing, or premature belt wear, leading to inconsistent steering assist. This pulley's 1/2" groove is matched to wide V-belt accessory drives, helping maintain proper belt seating and consistent tension.

Is this a pulley or a complete power steering pump?
This is the pulley only. It is a 1/2-inch single-groove aluminum pulley designed for compatible Saginaw power steering pumps. The power steering pump is not included.

What's the difference between this and the 3/8-inch pulley?
This pulley is designed for 1/2-inch wide V-belts, while the 3/8-inch version is designed for narrower 3/8-inch V-belts. Verify your accessory drive's belt width before ordering.

Will this fit a press-fit Saginaw pump shaft?
No. This pulley requires a keyed 5/8-inch shaft and is not compatible with press-fit Saginaw pump shafts.

Will this fit a GM Type II (TC) power steering pump?
No. This pulley is designed specifically for compatible Saginaw power steering pumps and is not compatible with GM Type II (TC) pumps.

Is this an underdrive or overdrive pulley?
No. This is a standard-drive pulley designed to maintain the factory-style drive ratio.

Does this come with mounting hardware?
No. Mounting hardware is not included.

Can I use this on a Small Block or Big Block Chevy build?
Yes. It is commonly used with Saginaw power steering pump accessory drives on Small Block Chevy, Big Block Chevy, street rod, hot rod, and engine swap applications.

What should I check before installing this pulley?
Verify the pump shaft diameter, keyway size, belt width, pulley offset, and belt alignment before installation to ensure proper fitment and reliable operation.