Chevrolet Blazer Distributor Ignition Pickup Guide: 1987-1995
Solve stalling and no-start problems in your Blazer by understanding this critical ignition part.
- A classic symptom of a failing pickup coil is the engine stalling when hot and refusing to restart until it cools down.
- Replacement is labor-intensive, requiring removal and disassembly of the distributor, followed by setting the ignition timing.
- Consider replacing the ignition control module (ICM) at the same time, as it is located in the same housing and causes similar issues.
- Both Delphi and Standard Ignition are reputable brands that offer reliable, long-lasting replacements for this part.
Is Your Blazer's Ignition Pickup Failing?
The ignition pickup is a common failure point on 1987-1995 Blazers due to age and constant engine heat. The wiring inside the coil can break down, causing problems that are often confusing. These issues can start small and get worse over time, eventually leaving you stranded.
Key Failure Symptoms
A bad pickup coil shares many symptoms with a bad ignition control module, as they are both located inside the distributor and fail from heat. Watch for these signs:
- Engine Stalls When Hot: This is the most common symptom. The Blazer runs fine when cold, but stalls after 20-30 minutes of driving. It often won't restart until the engine has cooled down completely. This happens as heat increases resistance in the coil's wires, causing the signal to fail.
- Engine Cranks But Won't Start: If the pickup coil fails completely, it sends no signal at all. The engine will turn over but will never fire up because there is no spark. 🎬 Watch this diagnostic guide for a Blazer that won't start.
- Rough Idle and Misfiring: A failing coil can send a weak or erratic signal, which confuses the ignition system. This can cause the engine to run rough, misfire, or hesitate during acceleration.
- Check Engine Light: The OBD1 system in these trucks is basic, but a severe timing or misfire issue caused by the pickup coil can sometimes trigger a light.
Choosing the Right Aftermarket Pickup Coil
Because replacing the pickup coil requires significant labor, it's important to choose a quality part to avoid doing the job twice. For the 1987-1995 Blazer, both OEM and quality aftermarket brands are reliable choices.
OEM-Level Quality:
- Delphi: Delphi was once part of General Motors and is a major OEM supplier. Their parts are engineered to meet or exceed original factory standards. Choosing a Delphi pickup coil is very similar to buying the original part, offering excellent reliability and fit.
Trusted Aftermarket:
- Standard Ignition (Standard Motor Products): Standard is a well-respected aftermarket brand with a long history. They manufacture parts for many store brands and are known for producing reliable components that often match OEM quality. For many professional mechanics, Standard is a go-to choice for ignition parts.
Pro Tip: A Proactive Replacement
The ignition control module (ICM) sits right next to the pickup coil inside the distributor and fails from the same heat and age. It also causes nearly identical symptoms, like stalling when hot. Since you must take the entire distributor apart to get to either part, it is highly recommended to replace both the pickup coil and the ignition control module at the same time. This can save you from having to do the same job again in the near future.
Typical Replacement Costs
The cost to replace a distributor ignition pickup is mostly labor. The part itself is inexpensive, but the process of removing and disassembling the distributor takes time.
| Part or Service | Estimated Cost |
|---|---|
| New Aftermarket Pickup Coil | $28 - $30 |
| New OEM (ACDelco) Pickup Coil | $25 - $40 |
| Shop Labor | $180 - $300 |
| Total Estimated Cost | $208 - $340 |
Frequently Asked Questions (FAQ)
Can I replace the distributor pickup myself?
Yes, this is possible for an experienced DIY mechanic. However, it requires removing the distributor, which means you must set the engine timing correctly with a timing light after you are done. The distributor must also be disassembled on a workbench to access the coil, which involves removing small pins and gears. 🎬 See this walkthrough on how to disassemble the distributor. If you are not comfortable with setting engine timing, it is best to leave this job to a professional.
Is the pickup coil the same as the ignition control module?
No, but they work together and are located in the same place. The pickup coil is a sensor that creates the timing signal. 🎬 Learn more about how these pickup coils work and fail. The ignition control module (ICM) is a small amplifier or switch that receives that signal and tells the main ignition coil when to create spark. They often fail together or cause the same symptoms.
Do I need any special tools?
You will need a basic socket set, screwdrivers, a hammer and punch to remove the gear roll pin, and a timing light to set the timing after reinstallation. A special distributor wrench can make it easier to loosen the bolt that holds the distributor in place.
Are there any recalls for the ignition pickup on my Blazer?
No. Searches of the National Highway Traffic Safety Administration (NHTSA) database show no recalls for the distributor or ignition pickup coil on the 1987-1995 Chevrolet Blazer. Any failures are due to the age and mileage of the vehicle.
Helpful Videos
Technical Specifications
OEM Part Numbers: D1987A D1987
2-terminal magnetic pickup coil located inside the distributor housing.
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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.
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