LS & Vortec Conversion Wiring
LS & Vortec conversion wiring
Engine-swap wiring that keeps the dash, ABS, 4WD, and computers working together.
Start a BuildWe build LS conversion wiring systems and calibrations for GM cars and trucks — from TBI trucks and S10s to Corvettes, Caprices, and custom projects.
Escalade cluster with modern fuel injection wiring
Marry the two harnesses into one
Swapping a TBI or CPI truck (or an S10) to an LT1 or LS1 usually means combining the factory body harness with the new engine harness. Done right, the dash, four-wheel drive, ABS, and on-board computers keep working. Done wrong, they don't.
Many vehicles still need the body computer in place, so it's common to run two controllers: one for the body, one for engine fuel management. We also convert 1995 Corvette LT1 harnesses to LS1 or LS2, and Caprice / Impala SS LT1 or L99 harnesses to LS1 and related platforms.
Common conversion paths
- LR4 4.8 → LS1
- LM7 5.3 → LS3
- LQ4 6.0 → LS9
- 8100 LS-based 411 big block
- LS2 → LS3 harness swap
Built around the factory systems that matter
Most conversions need two harnesses: the factory harness and the new engine harness. We custom-fit the new harness into the existing factory layout so the chassis systems stay intact.
Cluster & body integration
Need a 2001–2002 Escalade LQ4 cluster (or another GM cluster) in a street, crawler, or project vehicle? We can integrate it with modern fuel-injection wiring. We've also built full LS2 GTO-style body systems — cluster, body control module, and engine harness — so the car starts, drives, and behaves like a finished vehicle, not a pile of adapters.
Pricing & donor parts
Conversion work starts at $4,500. We often need customer-supplied donor wiring and computers, and we usually need to see the parts before quoting a final price.
Start a conversion build
Tell us the vehicle, current engine, target engine, and what wiring you already have.
Start a conversion build