2005–2013 Chevrolet Corvette
By Ray Delgado ✓ Certified Mechanic · Published Sep 21, 2026 · Updated Oct 22, 2026
Save $335 by doing it yourself! Shop cost: $450
Quick answer: Spark Plug Replacement on a 2005–2013 Chevrolet Corvette is rated Advanced and takes about 1-3 hours. You'll need 4 tools for this job, and parts cost about $115. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name | Part Number | Price | Buy |
|---|---|---|---|
| Correct spark plug set for the gasoline/ICE engine in 2005-2013 Chevrolet Corvette; verify engine, heat range, gap, and VIN fitment | — | $115.00 | |
| Coil-boot seals or ignition coils only if inspection finds damage Optional | — | $35.00 |
About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.
💡 Pro tip: Order all parts at once to save on shipping
Follow these steps carefully
The Z06's 7.0L LS7 runs a colder NGK TR6 plug, and the ZR1's supercharged LS9 takes AC Delco 41-104 — do not put base-model plugs in these engines.
Let the 2005-2013 Chevrolet Corvette cool completely — aluminum LS heads and hot plug removal invite stripped threads. Remove the fuel rail covers (the red or black 'Corvette' covers pull off) to expose the eight coil packs mounted on the valve covers, each with a short plug wire to its plug. Every wire wears a metal heat shield where it passes the exhaust manifold — note their positions. Twist each boot to break it free and pull the wires with plug-wire pliers, never by the wire. The rear plugs on both banks are tight against the firewall, so have a swivel socket and extensions ready.
I check coil boots for carbon tracking while they're off. White lines mean voltage is leaking — replace the boot.
Unbolt any coils blocking access and lay the plug wires aside in firing order so nothing gets crossed on reassembly. Use a 5/8-inch (16mm) spark plug socket with the rubber insert so each plug comes out captured.
Remove each old plug and compare it to the new AC Delco: identical reach, tapered seat and iridium construction. The factory 0.040-inch gap should be verified with a wire gauge, but never pry on the iridium center electrode — GM's guidance is to discard any plug that arrives out of spec rather than risk fracturing the tip. Thread each new plug in by hand for several turns until it seats squarely, then torque to the spec in your owner's manual for these tapered-seat plugs. Install them dry — the coated shell needs no anti-seize, which would corrupt the torque reading on the fine threads.
Smear dielectric grease inside each plug boot only — never on the plug — to prevent moisture tracking and ease the next service. Push every wire firmly onto its plug and coil until it clicks home, and refit all eight heat shields in their original positions. Refit the fuel rail covers, start the 2005-2013 Chevrolet Corvette, and confirm a smooth idle with no check-engine light. Road-test through the rev range — the LS should pull cleanly to redline — then rescan; a misfire that stays on one cylinder implicates that cylinder's coil or wire, not the new plugs.
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
2005–2013
2005–2013
2014–2019
2014–2019
2020–2024
2020–2024
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