• Top Street Performance GM Standalone LS1 Drive by Wire Engine and T56 Manual Transmission Wiring Harness
  • Top Street Performance GM Standalone LS1 Drive by Wire Engine and T56 Manual Transmission Wiring Harness - front view
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  • Top Street Performance GM Standalone LS1 Drive by Wire Engine and T56 Manual Transmission Wiring Harness - close-up
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Top Street Performance

GM Standalone LS1 Drive by Wire Engine and T56 Manual Transmission Wiring Harness

GM Standalone LS1 Drive by Wire Engine and T56 Manual Transmission Wiring Harness

SKU: WH1210

$488.88
$488.88 $555.55
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Top Street Performance (TSP) is committed to providing high-quality performance parts while complying with emissions regulations. This product is designed for use on vehicles that comply with federal emissions regulations. It is the customer’s responsibility to verify that this part is legal for use in their state or local jurisdiction. Check with your local emissions authority before purchasing.
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Product Details

Features

  • Standalone DBW harness for LS1/LS6 Corvette + CTS-V with T56 manual or non-electric auto
  • Fits Corvette (1997–2004) and Cadillac CTS-V (2004–2007) with LS1 intake manifolds
  • Uses EV1 injector plug; requires TSP adapter 81033 for GM MAP sensor #12592525
  • Plugs into TSP 81050 injectors with included adapters

Description

GM Standalone LS1 Drive by Wire Engine and T56 Manual Transmission Wiring Harness

This GM Standalone LS1 Drive by Wire Engine and T56 Manual Transmission Wiring Harness is built for standalone Drive-by-Wire engine management with T56 manual transmission. The harness integrates the fuse/relay box, sensor connectors, engine control wiring, fuel pump control, fan control, OBD2 connection, and supporting outputs needed for a clean LS/LT engine control installation.

Use this harness when the engine code, throttle type, transmission connector, ECU strategy, and sensor layout match the compatibility section. The EV1 injector plug style should be matched to the engine and injector set. Confirm transmission pin count, pedal and throttle body requirements, oxygen sensor layout, MAP/MAF connections, and power/ground routing before installation.

Specs

Throttle Drive-by-Wire
Injector Plug Style EV1
Harness Length Standard
Fuse Block Included Yes
Quantity Sold as a Kit
Included Connectors Fuse/Relay Box
Fuel Pump Control
Fan Controls
Check Engine Light
Speedometer
Tachometer
OBD2
Accelerator Pedal and Throttle Body Control
MAF Sensor
MAP Sensor
Engine Coolant Temp Sensor
Alternator Control
(2) Upstream Oxygen Sensors
Crankshaft Position
Camshaft Position
Fuel Injectors
Coil Packs
Manual or Automatic Transmission Control
Knock Sensors

Engine Fitment

COMPATIBLE WITH
('97-'04 Corvettes*):
*Fits LS1/LS6 (5.7L) Corvettes and CTS-V's
*Fits drive-by-wire applications with LS1 intake manifolds and T56 manual or non-electronic automatic (700R4, 200-4R, Powerglide, TH350, TH400) transmissions.

NOTES
For Use with TSP Products:
TSP adapter 81033 required in order to use GM #12592525 MAP sensor.
Will plug into TSP 81050 injectors with their included adapters.

COMMON VEHICLE APPLICATIONS
- Chevrolet Corvette (1997–2004, LS1/LS6, drive-by-wire)
- Cadillac CTS-V (2004–2007, LS6, T56 manual)
- LS engine swap applications using an LS1-style intake manifold with drive-by-wire throttle and a T56 manual or non-electronic automatic transmission

Q&A

What vehicles and engines is this harness compatible with?
This standalone wiring harness is designed for 1997–2004 Chevrolet Corvette LS1 and LS6 5.7L engines and 2004–2007 Cadillac CTS-V LS6 5.7L engines equipped with drive-by-wire throttle control and an LS1 intake manifold.

What transmissions does this harness support?
This harness is designed for applications using a T56 manual transmission or a non-electronically controlled automatic transmission, including the 700R4, 200-4R, Powerglide, TH350, and TH400.

What injector connector style does this harness use?
This harness uses EV1-style fuel injector connectors. Verify that your engine is equipped with EV1 injectors before ordering.

Do I need any TSP adapters to complete this installation?
Yes. TSP adapter 81033 is required when using GM MAP sensor 12592525. This harness also plugs directly into TSP 81050 fuel injectors when used with the included injector adapters.

Does this include a PCM/ECM?
No. This is a standalone engine wiring harness and does not include a PCM/ECM. A compatible PCM/ECM programmed for your specific engine combination is required.

What's included in this harness kit?
This harness includes wiring for the fuse/relay box, fuel pump control, electric fan controls, check engine light, speedometer, tachometer, OBD2 diagnostic port, accelerator pedal and throttle body control, MAF sensor, MAP sensor, engine coolant temperature sensor, alternator control, two upstream oxygen sensors, crankshaft position sensor, camshaft position sensor, fuel injectors, coil packs, transmission control, and knock sensors.

Does this include installation instructions?
Yes. A downloadable installation instruction sheet is available for this harness.

Emissions Notice

This product does not affect vehicle emissions and is not subject to emissions compliance regulations.