A Guide to the 1982-1990 GMC S15 Distributor Ignition Pickup
If your S15 cranks but won't start or stalls unexpectedly, the ignition pickup coil inside your distributor could be the problem.
- A no-start or sudden stalling condition is the primary symptom of a failed ignition pickup on an S15.
- Replacement requires removing the distributor and resetting ignition timing, making it a moderately difficult job.
- Quality aftermarket brands like Delphi and Standard Ignition are reliable choices for this repair.
- For efficiency, many owners and shops opt to replace the entire distributor assembly instead of just the internal pickup coil.
Is Your S15's Ignition Pickup Failing?
The ignition pickup is a common failure point in the ignition system of older trucks like the 1982-1990 GMC S15. When it fails, it typically does so completely, leaving you with an engine that cranks over but refuses to start. Sometimes, it can fail intermittently when it gets hot, causing the engine to stall while driving and then restart after it has cooled down. This can be a frustrating problem to diagnose, but the symptoms are usually clear.
Key Failure Symptoms
- Engine Cranks but Won't Start: This is the most common sign. You'll have power to your lights and radio, the engine will turn over, but it will never fire up due to a lack of spark.
- Sudden Engine Stalling: The truck may run fine and then suddenly die as if you turned the key off. This often happens when the engine is warm and may work again after a cool-down period.
- No Spark Condition: A mechanic can quickly verify this with a spark tester. If there's no spark coming from the ignition coil, the pickup coil and ignition module are the primary suspects.
Choosing the Right Aftermarket Pickup Coil
For a vehicle from this era, finding a brand-new OEM AC Delco part can be difficult. Aftermarket parts are the most common and practical solution. The key is to choose a brand with a reputation for quality to avoid doing the job twice.
- Delphi: Delphi is a well-respected brand with a history as an original equipment (OE) manufacturer for GM. Their parts are known to meet or exceed OE specifications and are considered a high-quality, reliable choice for ignition components.
- Standard Ignition (SMP): Standard Motor Products is another long-standing, trusted name in the aftermarket. They produce reliable ignition components that are a dependable alternative to OEM parts. Forum users have reported using their parts (sometimes branded as BWD) with good results.
OEM vs. Aftermarket Honesty: On a 30+ year old truck, the original part has likely reached the end of its life. A new, quality aftermarket pickup coil from a reputable brand like Delphi or Standard Ignition is a perfectly reliable and cost-effective repair. Avoid the cheapest, no-name options, as the labor to replace this part is more involved than the part's cost.
Cost of Replacing the Distributor Ignition Pickup
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Delphi, Standard) | $28.95 - $69.19 |
| Shop Labor | $180 - $350 |
| Complete New Aftermarket Distributor | $80 - $200+ |
Note: Many shops may recommend replacing the entire distributor assembly. This is often more time-efficient and replaces other wear items like the ignition module, shaft bushings, cap, and rotor all at once.
Frequently Asked Questions
Can I test the ignition pickup myself?
Yes, if you have a multimeter. You can test the pickup coil for resistance (ohms) and for AC voltage output while cranking the engine. A typical resistance reading is between 500 and 1500 ohms, but you should check a repair manual for your specific engine. If the reading is an open circuit (infinite resistance) or shows zero AC voltage while cranking, the coil is bad.
Do I have to replace the whole distributor?
No, you can replace just the pickup coil inside. However, the process requires taking the distributor out and disassembling it on a bench. For the extra labor involved, many mechanics and DIYers choose to install a complete new distributor assembly, which is often not much more expensive and renews all the internal components.
Is ignition timing affected by this repair?
Yes, absolutely. Because you must remove the distributor from the engine to access the pickup coil, you will need to reset the ignition timing with a timing light after you reinstall it. Skipping this step will result in poor performance, backfiring, or a no-start condition.
Are there any recalls for the S15 ignition pickup?
No. There are no specific recalls or technical service bulletins (TSBs) for the distributor ignition pickup on the 1982-1990 GMC S15. The widely publicized GM ignition switch recalls from the 2010s were for much newer vehicles (2003+) and related to the key switch in the steering column, not the distributor components.
Technical Specifications
OEM Part Numbers: D1987
Located inside the distributor assembly. Functions as a magnetic pulse generator to trigger the ignition control module. Replacement requires distributor removal and resetting of ignition timing.
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 S15: