Your Source LSX Conversion Parts. PSI specializes in the design and manufacture of GM Standalone Wiring Harnesses for LT1 and LS Engines and Transmissions.

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6l80/90 - 8L90 Paddle Shifter Kit

SKU: TAP-1000

TAP-1000

$610.00

(1)
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6L80/90 - 8L90 Floor Tap Shifter Kit

SKU: SFT-5000

TAP-2000

$499.00

(2)
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Tcc/Brake Switch Kit

SKU: KIT-1002

KIT-1002

$24.00

(18)
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LS Conversion Flex Plate with Bolts

SKU: DD-LS-FLEXPLATE-KIT

DD-LS-FLEXPLATE-KIT

$144.99

(0)
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OBD-II Interface

SKU: STA-1000

STA-1000

$114.95
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GPS Speedometer Interface

SKU: GPS-50-2

GPS-50-2

$234.95
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Universal Gear Shift Sending Unit

SKU: GSS-3000

GSS-3000

$134.95

(1)
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Electronic Signal To Mechanical Cable Drive Speedometer Adaptor

SKU: ECD-200BT

ECD-200BT

$365.00

(1)
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GM 128K VSS Pulse Generator 3 Wire

SKU: SEN-01-128

SEN-01-128

$144.95
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GM 8K VSS Pass-Through Pulse Generator for Cable Speedometers

SKU: SEN-01-4160

SEN-01-4160

$55.95
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Speed, Tach and Diesel Signal Interface, Bluetooth

SKU: SGI-100BT

SGI-100BT

$119.95

(1)
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Ls/Vortec Conversion Dipstick For Th350 (Lokar Braided Steel)

SKU: ACC-1013

ACC-1013

$139.99
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3-bolt flange yoke fits 6L80, 6L90, 8L90, 10L80 transmissions and 3 Bolt Differentials

SKU: T35-GMFD-01K

T35-GMFD-01K

$279.99
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Led Gear Position Indicator

SKU: DGS-12

DGS-1

$28.95
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Remote Mount TPS Adapter Kit for 4L60/80E

SKU: TCM-6000

TCM-6000-4L

$110.00
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Remote Mount TPS Adapter Kit for 6L80/90E

SKU: TCM-6000

TCM-6000-6L

$110.00
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Gauge Driver Controlled Reverse Lights Neutral Safety Relay Module for 6L80/8L90

SKU: SFT-4001

SFT-4001

$249.99

Looking for an Affordable, In Stock, Plug and Play wiring harness for your LS Swap? PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. These harnesses include the Gen II LT1/LT4, Gen III (24x) LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC3 Engines. All PSI Harnesses are Made in the USA. In addition to wiring harnesses, PSI carries Holley Products, Vintage Air A/C, Dakota Digital Gauges, HPTuners and PCM programming, Fuel Pump Kits, Engine Sensors, Extension Harnesses, Replacement GM connector pigtails and a complete line of hardware to complete your conversion needs!

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Transmission Parts

6l80/90 - 8L90 Paddle Shifter Kit

6L80/90 - 8L90 Floor Tap Shifter Kit

Tcc/Brake Switch Kit

LS Conversion Flex Plate with Bolts

OBD-II Interface

GPS Speedometer Interface

Universal Gear Shift Sending Unit

Electronic Signal To Mechanical Cable Drive Speedometer Adaptor

GM 128K VSS Pulse Generator 3 Wire

GM 8K VSS Pass-Through Pulse Generator for Cable Speedometers

Speed, Tach and Diesel Signal Interface, Bluetooth

Ls/Vortec Conversion Dipstick For Th350 (Lokar Braided Steel)

3-bolt flange yoke fits 6L80, 6L90, 8L90, 10L80 transmissions and 3 Bolt Differentials

Led Gear Position Indicator

Remote Mount TPS Adapter Kit for 4L60/80E

Remote Mount TPS Adapter Kit for 6L80/90E

Gauge Driver Controlled Reverse Lights Neutral Safety Relay Module for 6L80/8L90

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