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SKU:
NLT2D06358
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Power Steering Gearbox for 1968-1977 Chevy GMC C/K Trucks | 27-7501
$422.99
In Stock
$422.99
Sale price
$422.99
Regular price
This aftermarket power steering gearbox replaces 27-7501 on select 1968-1977 Chevrolet and GMC C/K-series pickups and Blazer applications.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- 1968-1977 Chevrolet C10
- 1968-1977 Chevrolet C20
- 1968-1977 Chevrolet C30
- 1969-1977 Chevrolet Blazer
- 1968-1977 GMC C15
- 1968-1977 GMC C25
- 1968-1977 GMC C35
Product Overview
A truck that wanders, binds, leaks from the gear, or has excessive steering-wheel play may have wear inside the steering box. This iron replacement helps restore the mechanical link between the column and pitman arm once loose suspension, rag-joint, linkage, and alignment problems have been checked.
Classic GM trucks can have swapped columns, axles, hoses, or steering conversions. Match the input shaft, spline count, hose ports, mounting pattern, and sector shaft—not the model year alone.
This is a high-quality aftermarket replacement or service part and is not manufactured or supplied by the original equipment brand. The names below identify compatible applications only.
Key Features & Performance
- Heavy cast-iron steering gear for compatible classic GM trucks
- Replacement path for excessive internal play, leakage, or binding
- Matches common 27-7501 aftermarket cross-reference
- Built for hydraulic power-steering applications with the correct fittings
Replaces Part Numbers
- 27-7501
Common Uses
- Replacing a steering box that leaks after hose and seal checks
- Correcting internal lash that remains after linkage inspection
- Repairing binding or rough sector movement in a compatible truck
Technical Specifications
- Product Type: Hydraulic power steering gearbox
- Housing Material: Cast iron
- Input Shaft Diameter: Approximately 20.32 mm / 0.80 in
- Application: Select 1968-1977 GM C/K trucks
- Replacement Type: Aftermarket
Installation & Fitment
- Verify input splines, sector splines, hose fittings, and mounting holes
- Center the new box and steering wheel before attaching the pitman arm
- Flush contaminated fluid and inspect the pump, hoses, coupler, and linkage
- Bleed the steering system with the front wheels safely raised
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown. Always verify the original part number, measurements, connections, and equipment configuration before purchase.
Frequently Asked Questions
Q: Can a new box fix highway wander? A: It can if internal gear wear is the cause, but alignment, tires, ball joints, linkage, and the column coupler must also be checked.
Q: Why do hose fittings matter? A: GM steering systems used different pressure and return connections; the ports must match the truck or an approved conversion.
Q: Should the pitman arm be replaced too? A: Inspect its splines and joint. A loose or worn arm can leave play even with a new steering box.
Part Summary
keywords: 27-7501 steering gearbox, 1968 Chevy C10 steering box, 1977 GMC power steering gear, C20 steering gear replacement, classic GM truck steering box, Chevy Blazer steering gearbox, aftermarket C10 power steering, truck wander steering repair
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.