1983-1992 GMC Jimmy Wiper Arm Replacement and Troubleshooting Guide
Don't let a weak or broken wiper arm compromise your visibility; here's what you need to know for your Jimmy.
- The most common failure is a weak internal spring causing the blade to lift from the windshield.
- Replacement is very simple and does not require special tools; a small pin or nail is used to release spring tension for removal.
- Aftermarket brands like Motormite (Dorman) are the most common and reliable source for new wiper arms for this vehicle.
- If one arm is failing, the other is likely weak as well. It is best to replace them in pairs for optimal performance.
Signs of a Failing Wiper Arm
When a wiper arm on your GMC Jimmy starts to fail, the symptoms are usually obvious and directly impact your ability to see in bad weather. Ignoring them can be a safety risk.
- Wiper Blade Lifting: The most common issue is the internal spring weakening with age. This causes the arm to lose its downward pressure, allowing the wiper blade to lift off the windshield, especially at higher speeds or in heavy wind.
- Streaking or Missed Spots: Even if the blade doesn't lift completely, weak spring tension will cause it to chatter, streak, or miss large patches of the windshield. This happens because the blade isn't making firm, even contact.
- Arm Not Moving: If a wiper arm isn't moving but you can hear the motor running, the splines inside the base of the arm may be stripped out. This can happen if the wipers are turned on when the blades are frozen to the windshield.
- Visible Damage: Corrosion, bends from heavy snow or ice, or damage from automatic car washes can all lead to poor performance.
A Note on Wiper Motor Issues
If your wipers behave erratically (e.g., won't turn off, park in the wrong spot), the problem may be with the wiper motor's circuit board, which is a known issue on many older GM trucks. This guide focuses on the arm itself, which is a separate mechanical part.
Choosing the Right Aftermarket Wiper Arm
For a vehicle like the '83-'92 Jimmy, finding new old stock (NOS) or OEM parts is nearly impossible. The aftermarket is your primary and most practical source. The good news is that aftermarket arms are designed to be direct-fit replacements.
Brand Tiers
- Motormite (Dorman): Motormite is a brand under the Dorman umbrella, a well-known and generally trusted aftermarket manufacturer. Their parts are engineered to be reliable replacements that restore original function, specifically addressing failures like spring wear and metal fatigue. For this part, Motormite is a solid, quality choice that should provide a long service life.
- Replacement: This is often a generic or store-brand name for parts that meet basic fitment and function requirements. While they are a budget-friendly option, quality can be inconsistent. For a critical safety component like a wiper arm, spending a few extra dollars on a known brand like Motormite is often a worthwhile investment for better spring tension and durability.
Pro Tip: Replace in Pairs
If one wiper arm's spring is weak, the other is likely not far behind. It's good practice to replace both front wiper arms at the same time to ensure even pressure and a consistent wipe across the entire windshield. It is also wise to install new wiper blades with your new arms.
Typical Replacement Costs
Replacing a wiper arm on your Jimmy is an inexpensive repair, especially if you do it yourself.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Part | $34.73 - $46.62 |
| Shop Labor | $45 - $90 |
| DIY Total | $34.73 - $46.62 |
| Shop Total | $80 - $137 |
Frequently Asked Questions
Can I just bend my old wiper arm to make it work better?
Some owners report temporary success by bending the arm to increase pressure on the glass. However, this is not a reliable long-term fix. It can be difficult to get the angle right, and it doesn't solve the underlying problem of a weak spring. A new arm is the correct and safest solution.
Is it hard to replace a wiper arm on my Jimmy?
No, this is a very easy DIY job. Unlike many modern cars, the wiper arms on this generation of Jimmy are not held on by a nut. They are secured by a small clip. The process involves lifting the arm, inserting a small pin or nail into a hole to release spring tension, and then wiggling the arm off the splined post. No special puller tool is typically needed.
Do I need a special tool to remove the wiper arm?
You should not need a special wiper arm puller. The design on these GM trucks uses a retaining clip that is released by propping the spring open with a small 1/8" pin, drill bit, or nail. Once the spring tension is released, the arm should come off the pivot post with some wiggling.
My wiper arm is moving, but the blade isn't touching the glass. What's wrong?
This is the classic symptom of a failed wiper arm. The spring inside the arm has lost its tension and is no longer pressing the arm and blade assembly against the windshield. Replacing the wiper arm will solve this problem.
Technical Specifications
OEM Part Numbers: 15591703
Length: ~19 inches, Material: Steel, Finish: Black
We Have This Part in Stock
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 Jimmy: