Choosing the Right Spark Plugs for Your 1989-1991 GMC Tracker
Keep your Tracker's simple and reliable 1.6L engine running strong with the correct new aftermarket spark plugs.
- NGK is the most recommended brand for the Tracker's Suzuki-built engine, often being the original equipment supplier.
- Standard copper plugs are the best choice; expensive iridium or platinum plugs offer little benefit for this engine.
- Always check and set the spark plug gap to 0.028 inches before installation.
- This is a very simple DIY job that can be done in under an hour with basic tools.
Signs of Failing Spark Plugs in Your Tracker
Because the 1989-1991 GMC Tracker uses a straightforward 1.6L 8-valve engine, also found in the Suzuki Sidekick, the signs of a spark plug problem are usually easy to notice. If your plugs are worn, you might experience one or more of the following issues:
- Rough Idling: The engine may shake or vibrate more than usual when you're stopped at a light.
- Trouble Starting: A weak spark makes it harder for the engine to fire up, especially on cold mornings.
- Engine Misfires: You might feel a hesitation, stumble, or jerk during acceleration. This can sometimes trigger the Check Engine Light with codes like P0300 for a random misfire. 🎬 Watch this guide on fixing misfires and ignition issues.
- Worse Fuel Economy: If you find yourself visiting the gas station more often, worn plugs could be wasting fuel.
- Loss of Power: The vehicle may feel sluggish and have trouble getting up to speed.
Choosing the Right Aftermarket Spark Plug
For a classic vehicle like the '89-'91 Tracker, you don't need to find an expensive original OEM part. The aftermarket offers excellent options that meet or exceed the original quality, especially since the original manufacturer also sells directly to the public.
Brand Quality Tiers
| Brand | Tier | Our Price Range | Notes |
|---|---|---|---|
| NGK | OEM-Level Quality | $3.50 - $9.00 | NGK is widely considered the original equipment manufacturer (OEM) for the Suzuki-built engine in your Tracker. Their standard V-Power copper plugs are a perfect match for the engine's original design and are highly recommended by owners. 🎬 Watch a full engine tune-up for your Tracker. While more expensive Iridium plugs are available, they offer little performance gain on this engine. |
| Champion | Standard Aftermarket | $3.50 - $7.50 | A well-known American brand, Champion's standard copper plugs are a reliable and affordable choice. They are a good fit for the Tracker's simple ignition system and are often used in classic vehicles and small engines. |
| Autolite | Standard Aftermarket | $3.50 - $14.32 | Autolite is another popular American brand known for providing good value. Their standard copper or platinum plugs are a suitable replacement for daily driving. Some mechanics have noted that certain Japanese engines run best on Japanese plugs like NGK. |
Pro Tip: Stick with Copper
The original spark plugs for your Tracker's engine were standard copper plugs. They work perfectly with its ignition system. While more expensive platinum or iridium plugs last longer, they don't provide a noticeable performance benefit on this engine and can sometimes cause issues if the ignition system isn't designed for them. Fresh copper plugs changed at the correct interval are the most cost-effective and reliable choice.
Known Issues, Recalls, or TSBs
Searches for recalls and Technical Service Bulletins (TSBs) related to spark plugs on the 1989-1991 GMC Tracker did not return any specific results. The vehicle had a recall for front seat belt buckles, but no engine-level recalls for this maintenance part were found. This is common for a simple, reliable vehicle of this age.
Frequently Asked Questions (FAQ)
How often should I change the spark plugs on my GMC Tracker?
For standard copper spark plugs, like the recommended NGK V-Power, a replacement interval of every 30,000 miles is a good practice to maintain peak performance and fuel efficiency.
What is the correct spark plug gap for a 1989-1991 GMC Tracker?
You should always verify the gap specification on the emissions sticker under your hood. However, the typical spark plug gap for the 1.6L engine is 0.028 inches. Always check and adjust the gap on new plugs before installation, as they are not always set correctly from the factory.
Is it hard to change the spark plugs on this vehicle?
No, this is a very easy job for a DIYer. The 1.6L engine provides excellent access to the four spark plugs. You will need basic tools like a ratchet, an extension, and a spark plug socket. The entire job can usually be completed in under an hour.
🎬 See this walkthrough on how to gap and replace plugs.Should I use anti-seize on the new spark plug threads?
This depends on the brand. NGK states that their plugs have a special trivalent plating that does not require anti-seize. Applying it can cause you to over-tighten the plug, potentially damaging the threads in the cylinder head. For other brands, check the manufacturer's instructions. If you do use it, apply only a very small amount to the threads, not the electrode.
Helpful Videos
Technical Specifications
Engine: 1.6L 8-Valve SOHC I4 (G16A) Spark Plug Gap: 0.028 in (0.7mm) Quantity Required: 4
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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 Tracker:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Signs of Failing Spark Plugs in Your Tracker
- Choosing the Right Aftermarket Spark Plug
- Brand Quality Tiers
- Pro Tip: Stick with Copper
- Known Issues, Recalls, or TSBs
- Frequently Asked Questions (FAQ)
- How often should I change the spark plugs on my GMC Tracker?
- What is the correct spark plug gap for a 1989-1991 GMC Tracker?
- Is it hard to change the spark plugs on this vehicle?
- Should I use anti-seize on the new spark plug threads?
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