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Standalone Wiring Harness for Drive-by-Wire LS1 with T56 Manual Transmission

Part Number: WH1210

Availability: In stock

Standalone Wiring Harness for Drive-by-Wire LS1 with T56 Manual Transmission
Inhouse technician available

Top Street Performance is proud to offer a one-year warranty.This product is covered by TSP’s one-year limited warranty. If within one calendar year, this product is deemed defective, TSP will repair or replace it. Exclusions apply.


P65 Warning WARNING: Cancer and Reproductive Harm -



Injector Plug StyleEV1
Harness LengthStandard
Fuse Block IncludedYes
QuantitySold 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
Crankfshaft Position
Camshaft Position
Fuel Injectors
Coil Packs
Manual or Automatic Transmission Control
Knock Sensors


An LS engine swap is a no-brainer when it comes to adding some affordable horsepower to a project car, but any swap comes with its share of headaches, including wiring. That's where TSP's engine and transmission wiring harness comes in. It is designed for engines from '97 - '04 drive-by-wire LS1 and LS6 Corvettes and CTS-V's with T56 manual or non-electronic automatic transmissions.


'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

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

Additional Information

Make Cadillac, Chevrolet, GMC, Hummer
Engine Type Chevrolet Small Block V8 Gen. III/IV (LS-Based)
Transmission Type No
Axle Type No
Warranty Limited Warranty
Maximum Voltage No
Instructions & Diagrams

Technical Resources

Download Installation Instructions