Rywire LS3 Swap Engine Harness - GM LS3 with E38 Engine Computer, Manual Transmission (LS3-E38)

Rywire LS3-E38 is a standalone engine harness for a GM LS3 engine run on the E38 engine computer with a manual transmission, the core of an LS3 swap. It plugs straight into the E38 computer plugs and meets the chassis through Deutsch connectors, so the rest of the car only has to supply power and a few signals. Every connector and wire is new, each terminal is crimped with pneumatic heads, and every plug carries a yellow ID label for an easy install. No core is required.

Engine Swap Fitment

• GM LS3 engine (sensors are LS3-style unless noted below)
• GM E38 engine computer, plug and play at the computer plugs
• Manual transmission
• Chassis interface: two Deutsch connectors, with a choice of power distribution (see Choosing Options)

Features

• All-new connectors and materials
• Pneumatic-head crimps on every terminal
• Yellow identification label on each connector
• High-interference circuits shielded and grounded
• Coils 1-8 wired straight to each 4-wire coil, no separate coil sub-harness
• Drive-by-wire: 6-pin throttle body plus accelerator pedal connector (2010 Tahoe pedal style)
• OBD2 scan tool connector
• 100% pin-to-pin tested and resistance checked

Connector List

• Chassis (2), Deutsch
• APP accelerator pedal (2010 Tahoe style)
• Scan tool (OBD2)
• Oil pressure, 3-pin Vortec style
• Grounds (3): 1 computer, 2 coils
• Spare: 3 extra wires
• O2 sensors (2), 5-pin trapezoid style
• Crank sensor
• Starter
• Reverse lockout
• VSS, 2-wire magnetic speed sensor
• Reverse lamp switch
• Coils 1-8 (4-wire)
• Injectors 1-8, Bosch EV14/EV6 by default
• Coolant temperature (ECT)
• Alternator, 2-wire
• Cam sensor
• MAF
• Knock sensors 1-2
• MAP: throttle-body-mounted pressure sensor (LS3/LS9 Vortec style), Bosch or Delphi
• Throttle body, 6-pin drive-by-wire

Choosing Options

• Chassis Interface: "Rywire PDM System" sets the harness up to run from a Rywire PDM power distribution system (no extra cost). "LS3 Fuse/Relay Box V3 with Switch Panel" adds an LS3-specific Rywire fuse/relay box and switch panel. "Mating Connector" supplies the mating chassis connector so you can wire the harness into your own power setup.
• MAP Sensor: Bosch is the default throttle-body-mounted MAP sensor plug; choose Delphi if that is the sensor you run.

What's Included

• LS3/E38 standalone engine harness, built to the options you choose
• Fuse/relay box with switch panel, or mating connector, if selected

Frequently Asked Questions

Do I need to send in a core?

No. The harness is built from all-new wire and connectors, so no core is required.

Which computer does it plug into?

The GM E38 engine computer. The harness is wired for an LS3 with a manual transmission; ask us before ordering if your combination is different.

Does the coil harness come separately?

No. All eight coils are wired directly into this harness, so there is no separate coil sub-harness to buy. Email service@tunedbyshawn.com with your engine, chassis and ECU before ordering if you are unsure which configuration you need. Tuned By Shawn can tune your swap on Haltech.

For off-road and competition use only. Not legal for use on pollution-controlled motor vehicles.