A Guide to Replacing the Distributor in a 1987-1995 Chevrolet Blazer
If your Blazer is misfiring, stalling, or won't start, a worn-out distributor could be the problem.
- Distributor failure is common on high-mileage 1987-1995 Blazers, causing misfires, stalling, and no-start conditions.
- Always check the simple parts first; a new distributor cap and rotor might solve your problem for less money.
- For a stock engine, a quality OE-style replacement from a brand like Delphi is a reliable choice.
- Proper installation is critical. You must set the engine timing correctly with a timing light after replacement.
Is Your Blazer's Distributor Failing?
After decades of service, the distributor in your 1987-1995 Blazer is a common failure point. The internal components, like the shaft bushings, gear, and ignition module, wear out from heat and high mileage. A worn distributor can leave you stranded. Watch for these common symptoms.
Key Failure Symptoms:
- Engine Misfires: The engine may shake, stumble, or run rough, especially under load.
- No-Start Condition: The engine cranks over but will not fire up due to a lack of spark. This can be intermittent.
- Sudden Stalling: The engine may cut out unexpectedly while driving, often when it gets hot.
- Backfiring: Incorrect spark timing can cause the engine to backfire through the intake or exhaust.
- Check Engine Light: While OBD1 systems in these trucks are less specific, a timing or misfire issue can sometimes trigger a light.
A Note on Cap and Rotor
Often, the problem isn't the entire distributor but simply a worn-out distributor cap and rotor. These parts handle the high-voltage spark and can develop carbon tracks or corrosion, leading to a weak or misdirected spark. If your cap and rotor are old, consider replacing them first as it's an inexpensive and easy job.
🎬 Watch this step-by-step guide to replacing your V6 distributor.Choosing the Right Aftermarket Distributor
For a vehicle of this age, new OEM distributors from GM are often unavailable or prohibitively expensive. The aftermarket offers a wide range of new distributors that meet or exceed original specifications. They come as complete, ready-to-install units with a new cap, rotor, and ignition module included.
Brand Quality Tiers
When shopping for a replacement, you'll find several brands. Here’s a general breakdown of what to expect:
- Premium & OE-Style Brands (Delphi, Pertronix): Delphi is a well-regarded brand that often manufactures original equipment parts for GM. Choosing a brand like Delphi provides confidence in fit and long-term reliability. Pertronix is known for high-quality ignition components and offers excellent drop-in replacements.
- Performance Brands (MSD, Accel, FAST): Brands like MSD offer high-performance distributors designed for racing or modified engines. They often feature billet aluminum housings and require a separate ignition control box. While high-quality, these are overkill and may not be compatible with a stock engine setup.
- Standard Aftermarket Brands (Cardone, WAI Global, Replacement): These brands offer a balance of value and quality for a daily driver. Cardone is a major player in the aftermarket, offering both new and remanufactured parts. However, owner reviews suggest quality can sometimes be inconsistent, with some users needing to replace the included ignition module sooner than expected. Brands listed as "Replacement" or from value lines offer the most budget-friendly option but may not have the same long-term durability as premium brands.
Check the Gear Material
Your Blazer's engine has a specific type of camshaft gear. Ensure your new distributor comes with a compatible distributor gear (typically iron for stock applications) to prevent premature wear and failure of the gear on the distributor or the camshaft itself.
Distributor Replacement Cost for 1987-1995 Chevrolet Blazer
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Distributor | $135 - $598 |
| Remanufactured Distributor | $80 - $200 |
| Shop Labor for Installation | $150 - $300 |
Frequently Asked Questions
Can I replace the distributor myself?
Yes, this is a feasible DIY job for someone with mechanical experience. However, it is critical to set the engine to Top Dead Center (TDC) on the #1 cylinder before removing the old distributor and to mark the rotor's position. Failure to install the new distributor in the correct position will throw off the engine's timing, causing it to run poorly or not at all. You will also need a timing light to set the base ignition timing 🎬 See these essential tips for a successful distributor installation. correctly after installation.
Are there any recalls on the distributor for my Blazer?
No, searches of the National Highway Traffic Safety Administration (NHTSA) database show no recalls specifically for the distributor on the 1987-1995 Chevrolet Blazer. Any failures are considered normal wear and tear for a vehicle of this age.
What are the most common mistakes when ordering a distributor?
The biggest mistake is getting the wrong part for your specific engine. The 1995 model year was a transition period for Chevrolet, and there can be differences in the distributor design. Always verify the part fits your Blazer's year and engine (e.g., 4.3L V6 TBI) before ordering. 🎬 Watch a complete walkthrough for replacing the distributor on TBI engines. Also, be aware that performance distributors may require additional components like a separate ignition box to function.
What does the ignition control module (ICM) do?
The Ignition Control Module is a small electronic component located inside the distributor on these Blazers. It acts as a switch, turning the ignition coil on and off to create the spark. ICMs are a very common failure point and can cause a frustrating stall-when-hot, no-start-until-cool symptom. All new aftermarket distributors should come with a new ICM already installed.
Helpful Videos
Technical Specifications
OEM Part Numbers: 1103417 1104078 1103976 1103917 12570426 12598210 93441559
Typically includes a new distributor cap, rotor, ignition control module, and iron gear for compatibility with stock camshafts. Designed for the 4.3L TBI V6 engine.
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.
- Chevrolet Blazer:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Blazer's Distributor Failing?
- Key Failure Symptoms:
- A Note on Cap and Rotor
- Choosing the Right Aftermarket Distributor
- Brand Quality Tiers
- Check the Gear Material
- Distributor Replacement Cost for 1987-1995 Chevrolet Blazer
- Frequently Asked Questions
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