Power Steering Pump Replacement Guide for the 1987 GMC R1500
Keep your classic GMC R1500 steering smoothly and quietly with the right new power steering pump.
- A whining noise and stiff steering are the clearest signs your pump is failing.
- You MUST use a power steering pulley puller/installer tool for this job to avoid damaging the pump.
- Aftermarket quality varies greatly; PSC is a high-end, reliable option, while budget remanufactured brands like Cardone have mixed reviews.
- Always flush the old fluid and consider replacing the 30+ year old hoses to protect your new pump.
Is Your Power Steering Pump Failing?
The Saginaw-style power steering system in your 1987 GMC R1500 is simple and tough, but the pump will eventually wear out. When it does, the signs are usually obvious. Ignoring them can lead to a complete loss of power assist, making the truck very difficult and unsafe to steer.
Common Failure Symptoms:
- Whining or Groaning Noises: This is the most classic symptom. You'll hear a distinct whine that gets louder when you turn the steering wheel or as engine RPMs increase. This is often caused by air in the system, low fluid, or internal pump wear.
- Stiff or Jerky Steering: If the steering wheel feels heavy or difficult to turn, especially at idle or in a parking lot, the pump is likely failing to produce enough pressure.
- Fluid Leaks: Puddles of reddish or light brown fluid under the front of your engine are a clear sign of a leak. On these pumps, leaks often happen from the seals between the pump body and the reservoir, or from the hose connections.
- Squealing Belt: If the pump's internal rotating parts begin to bind or seize, it can put a heavy drag on the engine belt, causing a loud squeal.
Check Your Fluid First
Before condemning your pump, always check the power steering fluid level. Low fluid is a common cause of noise and stiff steering. If the level is low, top it off with standard power steering fluid and check for leaks. Do not use Automatic Transmission Fluid (ATF), as it can damage the seals in the original-style pump.
Choosing the Right Aftermarket Pump
For a 1987 model, new original GM parts are generally not available. The aftermarket offers several tiers of quality and price. Your choice depends on your budget and how you use your truck.
Tier 1: High-Performance / Heavy-Duty New
- PSC Motor Sports: This brand specializes in new, high-performance steering components. Their pumps are built from scratch with upgraded internals, not remanufactured. They are designed for heavy-duty use, such as trucks with larger tires or those used for off-roading. While they are the most expensive option, they offer superior reliability and performance, making them a 'buy it once, do it right' solution.
Tier 2: Standard Remanufactured
- Cardone & BBB Industries: These are two of the most common brands for remanufactured parts. They are budget-friendly, but their quality can be inconsistent. Forum discussions and part reviews show that it's not uncommon to receive a pump that is noisy or leaks right out of the box. Many owners have had to exchange these pumps multiple times to get a good one. While they come with a warranty, the labor to replace a failed pump multiple times can be frustrating.
Pro Tip: New vs. Remanufactured
Given the mixed reviews for remanufactured pumps, opting for a 'new' aftermarket pump (not remanufactured) from a brand like Cardone may offer better reliability than their remanufactured line for a small increase in price. However, for maximum durability, a purpose-built new pump from a brand like PSC is the top choice.
Estimated Costs for a New Power Steering Pump
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Standard) | $79.89 - $150.00 |
| New Aftermarket (Performance - PSC) | $250.00 - $400.46 |
| Remanufactured Aftermarket (Cardone, BBB) | $80.00 - $120.00 |
| Shop Labor | $150 - $300 |
Frequently Asked Questions (FAQ)
Do I need special tools to replace the pump?
Yes. You absolutely need a power steering pump pulley puller and installer tool. The pulley is pressed onto the pump's shaft. Attempting to remove it with a hammer or generic puller will destroy the new pump. Most auto parts stores offer these tool sets for rent.
Should I replace the power steering hoses at the same time?
Yes, it is highly recommended. After more than 30 years, the original rubber hoses become hard, brittle, and prone to cracking. A failing hose can leak fluid or introduce air into your new pump, causing it to fail prematurely. Replacing them is cheap insurance for your new part.
Why is my new pump whining?
The most common cause of whining from a new pump is air trapped in the system. The system must be properly bled by raising the front wheels off the ground and turning the steering wheel fully from lock to lock at least 20 times with the engine off, topping off the fluid as needed. If the noise persists, it could be due to contaminated fluid that wasn't fully flushed or, in the case of some budget brands, a defective pump.
Are there any recalls for my truck's power steering?
No. A search of the National Highway Traffic Safety Administration (NHTSA) database shows no recalls related to the power steering system for the 1987 GMC R1500.
Technical Specifications
This vehicle uses a belt-driven, Saginaw-style power steering pump. Most aftermarket replacements come with the fluid reservoir attached. The pulley is a press-fit and must be transferred from the old pump.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- GMC R1500:
- 🛍️ Shop This Part
- Is Your Power Steering Pump Failing?
- Common Failure Symptoms:
- Check Your Fluid First
- Choosing the Right Aftermarket Pump
- Tier 1: High-Performance / Heavy-Duty New
- Tier 2: Standard Remanufactured
- Pro Tip: New vs. Remanufactured
- Estimated Costs for a New Power Steering Pump
- Frequently Asked Questions (FAQ)
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