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Right Brake Proportioning Valve for GMC Chevy Truck C/K 1500 2500 3500 1989-94

Right Brake Proportioning Valve for GMC Chevy Truck C/K 1500 2500 3500 1989-94 is an aluminum 4-port brake valve priced at $44.08. Ensures balanced braking for 1/2-ton to 1-ton GM trucks. Ideal for restoring or upgrading older C/K series pickups with 2WD or 4WD systems.

$44.08

● In stock

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Key features

  • Aluminum construction for durability
  • 4-port design matches OEM setup
  • Fits 1989–1994 C/K 1500–3500 models
  • Balances front-to-rear brake pressure
  • Compatible with 2WD and 4WD systems
  • Works with gas and diesel engines
  • Direct replacement, no modifications

Pros

  • +Exact OEM fit for easy installation
  • +Durable aluminum resists corrosion
  • +Maintains safe brake balance
  • +Affordable at $44.08
  • +Wide vehicle compatibility
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Cons

  • Not adjustable for performance tuning
  • Only fits specific GM truck years

About Right Brake Proportioning Valve for GMC Chevy Truck C/K 1500 2500 3500 1989-94

What is Right Brake Proportioning Valve for GMC Chevy Truck C/K 1500 2500 3500 1989-94?

The Right Brake Proportioning Valve for GMC Chevy Truck C/K 1500 2500 3500 1989-94 is a direct-fit replacement component designed to regulate rear brake pressure in full-size GM trucks from 1989 to 1994. Constructed from durable aluminum with four hydraulic ports, this valve prevents rear wheel lockup during braking by balancing pressure between front and rear axles. It's essential for maintaining safe, controlled stops, especially under heavy loads or sudden braking conditions. Compatible with both 2WD and 4WD models across the C/K 1500, 2500, and 3500 series, it fits trucks equipped with V6 4.3L, V8 5.0L, 5.7L, 7.4L, and 6.2L diesel engines.

Key features

  • Aluminum Construction — Lightweight and corrosion-resistant housing ensures long-term durability.
  • 4-Port Design — Matches OEM configuration for seamless integration into existing brake lines.
  • Exact Fitment — Specifically engineered for 1989–1994 GM C/K series trucks, no modifications required.
  • Improved Brake Balance — Prevents rear wheel skidding by modulating pressure during deceleration.
  • Universal Compatibility — Fits all 1/2-ton through 1-ton Chevy and GMC full-size pickups regardless of drivetrain.
  • Easy Identification — Replace your existing valve if it’s aluminum with four ports—this unit will match.
  • Restoration-Ready — Ideal for classic truck rebuilds where OEM-spec parts are critical.

Who is Right Brake Proportioning Valve for GMC Chevy Truck C/K 1500 2500 3500 1989-94 for?

This brake proportioning valve serves DIY mechanics, restoration specialists, and fleet maintenance teams working on late-’80s to mid-’90s GM trucks. It's perfect for anyone replacing a worn, leaking, or failed original valve without resorting to aftermarket recalibration. Enthusiasts restoring vintage C/K models will appreciate its OEM-matching design and reliable performance. It's also suited for use in work trucks that require dependable braking under variable loads.

How does Right Brake Proportioning Valve for GMC Chevy Truck C/K 1500 2500 3500 1989-94 compare?

Compared to generic or adjustable proportioning valves, this unit offers a plug-and-play solution that maintains factory brake dynamics without tuning. Unlike plastic-bodied or two-port alternatives, its all-aluminum, four-port construction matches the durability and layout of the original GM design. It outperforms universal kits that require adapters or custom plumbing, reducing installation time and failure points. While not adjustable like high-end racing valves, it delivers consistent, safe performance ideal for daily drivers and classic truck restorations.

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Best use cases

  • Replacing a leaking brake valve
  • Restoring a 1990s Chevy C/K truck
  • Upgrading worn factory hardware
  • Fixing rear brake lockup issues
  • Maintaining fleet vehicle safety
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Is Right Brake Proportioning Valve for GMC Chevy Truck C/K 1500 2500 3500 1989-94 right for you?

Buy this valve if you own a 1989–1994 GMC or Chevy C/K 1500, 2500, or 3500 truck and need a reliable, direct-fit replacement. Ideal for intermediate DIYers with basic brake system knowledge. No special tools required. If your old valve is aluminum with four ports, this is the correct match. For performance builds, consider an adjustable valve instead.

How it compares: Compared to universal or adjustable proportioning valves, this unit offers superior fit and reliability for GM trucks 1989–1994. It avoids the complexity of tuning while outperforming plastic or two-port alternatives in durability and safety.

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Frequently Asked Questions

What does a brake proportioning valve do?

A brake proportioning valve regulates hydraulic pressure to the rear brakes, preventing them from locking up during hard stops. It ensures balanced braking by reducing pressure to the rear axle, improving control and safety, especially in trucks with varying loads.

Does this fit both 2WD and 4WD trucks?

Yes, this brake proportioning valve fits both 2WD and 4WD models of the 1989–1994 GMC and Chevy C/K 1500, 2500, and 3500 series trucks. Drivetrain type does not affect compatibility.

How do I know if this valve fits my truck?

Check your existing valve: if it's made of aluminum and has four hydraulic ports, this unit will fit. It's designed for all full-size GM 1/2-ton to 1-ton trucks from 1989 to 1994.

Is this valve adjustable?

No, this is a fixed-rate proportioning valve designed to replicate OEM performance. It does not require adjustment and is intended for stock or restored brake systems.

Can I install this myself?

Yes, if you have basic brake system experience. You'll need to depressurize the system, remove the old valve, and reconnect lines. Bleed the brakes afterward to ensure proper operation.

How much does Right Brake Proportioning Valve for GMC Chevy Truck C/K 1500 2500 3500 1989-94 cost?

Right Brake Proportioning Valve for GMC Chevy Truck C/K 1500 2500 3500 1989-94 is $44.08 at Lab Work Auto. Prices may change — click through to Lab Work Auto for the latest.

Is Right Brake Proportioning Valve for GMC Chevy Truck C/K 1500 2500 3500 1989-94 in stock at Lab Work Auto?

Yes, Right Brake Proportioning Valve for GMC Chevy Truck C/K 1500 2500 3500 1989-94 is currently in stock at Lab Work Auto.

Specifications

SKU
F8-016484
Last updated May 14, 2026