LS PWM/STD Alternator & Sensor Pull-Up Controller M27500-20SB3T23 Suits the valley-mounted knock sensors

Suits the valley-mounted knock sensors used on LS1 and related Gen III engines as well as the LS2 and Gen IV knock sensor configuration

weatherproof result

Hall-effect style inputs

Plug and pins only AMP 34 pin 4 Row 4 Key Superseal

This harness expands the functionality of a Nexus Plug-in ECU by adding connections for a wideband O2 sensor

LS PWM/STD Alternator & Sensor Pull-Up Controller M27500-20SB3T23 Suits the valley-mounted knock sensorsLS PWM & STD Alternator & Sensor Pull Up Controller This module does everything the standard LS PWM Alternator Controller does, plus it integrates common pull up resistors required for external ECU sensors. It is designed to simplify wiring when running Holley or similar ECUs that rely on external pull ups for certain inputs. It allows you to: Run a PWM controlled LS alternator without an ECU Or run a standard alternator excite And cleanly wire