• Top Street Performance GM Standalone LH6, LY5, LMG, LH8 Drive by Wire Engine and Standard Trans Wiring Harness
  • Top Street Performance GM Standalone LH6, LY5, LMG, LH8 Drive by Wire Engine and Standard Trans Wiring Harness - front view
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Top Street Performance

GM Standalone LH6, LY5, LMG, LH8 Drive by Wire Engine and Standard Trans Wiring Harness

GM Standalone LH6, LY5, LMG, LH8 Drive by Wire Engine and Standard Trans Wiring Harness

SKU: WH1215

$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 engine harness for 09–14 5.3L LH6/LY5/LMG/LH8 + T56/TR6060 or non-electric auto
  • Not compatible with 2005–2008 LH6 (different connector generation)
  • Includes fuse/relay box, sensor wiring, fuel injectors, coil packs, OBD2
  • Uses EV6-style injector plug; PCM/ECM, throttle body, pedal not included

Description

GM Standalone LH6, LY5, LMG, LH8 Drive by Wire Engine and Standard Trans Wiring Harness

This GM Standalone LH6, LY5, LMG, LH8 Drive by Wire Engine and Standard Trans Wiring Harness is built for standalone Drive-by-Wire engine management with standard 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 EV6 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 EV6
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
Transmission Control
Knock Sensors

Engine Fitment

COMPATIBLE WITH
'09-14 Trucks*
*Fits drive-by-wire applications with 5.3 L LH6, LY5, LMG, and LH8 engines and T56/TR6060 manual or non-electronic automatic (700R4, 200-4R, Powerglide, TH350, TH400) transmissions.

NOTES
Standalone harness — requires a compatible PCM/ECM matched to your engine code.
Fits 2009-2014 production of LH6, LY5, LMG, and LH8 5.3L engines specifically — earlier (2005-2008) LH6-equipped vehicles use a different harness connector generation and are not covered by this harness.
Does not include a PCM/ECM, throttle body, or accelerator pedal — confirm these separately before ordering.

COMMON VEHICLE APPLICATIONS
- Chevrolet Silverado / GMC Sierra (2009–2013, 5.3L LH6/LY5/LMG/LH8)
- Chevrolet Tahoe/Suburban, GMC Yukon/Yukon XL (2009–2014, 5.3L LH6/LY5/LMG/LH8)
- Escalade (2009–2014, where equipped with a 5.3L variant)
- LS/LT engine swap applications using a 2009-2014-generation 5.3L truck engine and connector set paired with a T56/TR6060 manual or non-electronic automatic transmission

Q&A

What engines and transmissions is this harness compatible with?
This standalone wiring harness is designed for 2009–2014 GM 5.3L LH6, LY5, LMG, and LH8 Gen IV LS engines paired with a T56 or TR6060 manual transmission, or a non-electronically controlled automatic transmission, including the 700R4, 200-4R, Powerglide, TH350, and TH400.

Will this fit an earlier LH6 engine?
No. This harness is designed for 2009–2014 applications. Earlier 2005–2008 LH6 engines use a different harness connector generation and are not compatible.

What injector connector style does this harness use?
This harness uses EV6-style fuel injector connectors. Verify that your engine is equipped with EV6 injectors before ordering.

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.

Does this include the throttle body or accelerator pedal?
No. The throttle body and accelerator pedal are not included and must be purchased separately.

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.