Ignition coils are critical on any LT Gen V build. The coil converts low voltage from the battery into the high voltage required to fire the spark plug. The ECM controls dwell and timing, and the coil must charge and discharge consistently every cycle. Weak or unstable spark leads to misfires, reduced power, poor fuel burn, and on boosted engines can cause detonation and serious damage. From GM, LT coils mount directly to the valve covers and are exposed to heat and vibration. Proper coil selection matters, especially on high compression or forced induction combinations.

Early Gen V LT engines used carry over LS Gen IV style coils such as the D510C and D514A. These share the same wiring connector and similar bolt pattern. Depending on valve cover and bracket clearance, they can interchange on some setups. GM later released the D522C ignition coil, part number 12726023. This coil replaced the older D510C design. The D522C features faster recharge time, improved coil saturation, and more consistent spark at higher RPM. GM also upgraded the internal insulation and dielectric materials for improved heat resistance and durability. It is a direct drop in replacement for D510C using the same connector and bracket with no rewiring and no tuning required.

All LT Gen V ignition coils share the same bolt pattern and the same style electrical connector. That means they are physically interchangeable and plug directly into the factory harness with no tuning changes required.

On Gen V V6 LT engines with RPO code LV1, GM uses coil part number 12723610. This is the smallest, lightest, and most compact ignition coil used on the LT platform. It is also smaller and lighter than traditional LS truck and car coils. Despite its compact size, the LV1 coil uses the same LT connector and the same bolt pattern as other LT coils. It is a direct plug in with no tuning required. This makes it a strong option for tight engine bays, custom swaps, or builds where packaging and weight matter.

What this means to you?

It does not matter which factory LT ignition coil you are using or switching to, since the wiring connector, bolt pattern, and spark plug wire connection are all the same. If you are building a high RPM or boosted LT, the newer D522C design offers improved stability under load. If you are tight on space or want the most compact LT coil available, the LV1 12723610 coil is the smallest and lightest option while still being a direct plug in. If you are relocating coils for a cleaner engine bay, ICT Billet offers coil relocation brackets, harness extensions, and cut to fit spark plug wire sets to hide your coils down below, while clearing off your valve covers for a clean, show winning look.

See link to shop ICT Billet Ignition Coils