Autoexact Ignition Coil Packs Iridium Spark Plugs Wires Kit for 1990-2008 Buick/Pontiac/Chevy/Oldsmobile 3.8L V6 (DR39, D555) – 3 Coils, 6 Iridium Plugs, 6 Wires

What it is

This is a complete ignition replacement kit designed for select 3.8L V6 engines from Buick, Pontiac, Chevy, and Oldsmobile. It bundles three ignition coils, six iridium spark plugs, and six spark plug wires, all intended to work together as a direct replacement package. The goal is to simplify maintenance and restore steady ignition performance when ignition components show wear.

Fitment and how to check compatibility

Before buying, verify year, make, model, and engine to ensure the kit matches your vehicle. The kit lists OE/interchange numbers DR39, D555, 5599, and 3403 and targets models including LeSabre (1990–2005), Grand Prix (1997–2008), LaCrosse, Lucerne, Impala (2000–2005), Park Avenue, Bonneville, and other listed applications. If you’re unsure, contact the seller with your VIN or vehicle details for fitment support. While the printed spark plug numbers on old plugs can differ from new ones, that alone doesn’t mean incompatibility—alignment with the OE numbers is the safer check.

What problems it aims to address

Worn ignition coils or spark plugs can cause engine misfires, rough idle, hard starting, hesitation, vibration, and slower acceleration. This kit is intended to address those symptoms by replacing the ignition path in one go, potentially restoring smoother ignition and combustion. Keep in mind that other engine issues can also trigger similar codes, such as P0300–P0308, so diagnostic context matters.

What’s included and why it’s convenient

The package provides a full ignition renewal: 3 coils, 6 pre-gapped iridium spark plugs, and 6 spark plug wires. Replacing coils and plugs together helps reduce the need for sourcing parts separately and can lead to a more cohesive ignition system than swapping components piecemeal. The coils feature epoxy-potted construction for heat, moisture, and vibration resistance, while the iridium plugs are pre-gapped for reliable ignition. The kit also ships with factory pre-lubricated green dielectric grease to aid DIY installation, and it’s designed for direct replacement with basic tools.

What to know before you buy

• Installation torque for spark plugs is specified at 11.06 ft-lb (15 N·m).
• Coils are designed with sealed construction and secure terminals to withstand daily driving conditions.
• The spark plugs’ numbers on the new parts may not exactly match the old ones, but fitment should align with the specified OE/interchange numbers.
• The kit includes a 2-year warranty and lifetime technical support.

Practical usage and how it behaves in use

If your vehicle starts reliably after replacement and you notice a noticeable improvement in idle smoothness and throttle response, that’s a sign the ignition path was a contributing factor. For a typical 3.8L V6, this kit targets the common wear points—coils, plugs, and wires—so you’re not left with a partial repair that quickly reveals another weak link.

Pros and cons in plain terms

• Pros: Complete, coordinated replacement, pre-gapped iridium plugs for reliable ignition, weathered-coil resistance, included wires to simplify the job, factory lubrication aid, warranty and ongoing support.
• Cons: Requires confirmation of exact fitment with your year/model/engine, the number matching approach means you must rely on OE/interchange numbers rather than plug visuals alone, not all 3.8L configurations may be covered by the listed applications.

Who it’s for

This kit is a solid fit if you own one of the listed 3.8L V6 GM platforms and you’re planning a full ignition refresh in one go. It’s particularly appealing if you want a single, cohesive upgrade rather than buying separate components. If you’re not sure about your exact configuration, this product’s emphasis on fitment verification and OE numbers is a helpful starting point.

When it makes sense to buy

• You’re experiencing misfires, rough idle, or hesitation that aligns with ignition components wearing out.
• You prefer installing a complete kit in one session to reduce the chance of mismatched parts or repeat repairs.
• You want a package that includes coils, plugs, and wires with a warranty and support.

When to pass on this kit

• If your vehicle’s engine is not on the specified 3.8L GM family or the exact years don’t line up with the listed applications.
• If you don’t want to verify fitment via OE/interchange numbers or VIN-based checks.
• If you’re comfortable sourcing components separately and enjoy shopping around for potentially lower prices.

Quick check list before purchase

• Confirm year, make, model, and engine are in the supported range.
• Cross-check OE numbers DR39, D555, 5599, 3403 against your vehicle’s specifications.
• Be prepared to torque spark plugs to 11.06 ft-lb (15 N·m).
• Consider the warranty and lifetime technical support as a buying comfort factor.

Final thoughts and decision focus

This kit suits buyers looking for a comprehensive ignition refresh for certain GM 3.8L V6 vehicles. If you prioritize ease of installation, a bundled solution, and a two-year warranty with ongoing support, it makes sense to consider. If your model falls outside the listed applications, or you’re certain you only need a spark plug or a single coil, you may want to explore other options.

FAQ (practical and data-driven)

• Do the spark plugs come pre-gapped? Yes, they are pre-gapped to support reliable ignition.
• Are there warranty and support options? Yes, a 2-year warranty and lifetime technical support are included.
• Can I install this myself? The package is designed for direct replacement with basic tools, but verify fitment first to avoid incorrect purchases.