LS2-LS3 Trigger Information
Sensor Information
Trigger System
The LS2 engine has a trigger system mounted on the crankshaft that has a 60-2 tooth pattern. This refers to there being 60 total teeth with 2 that are missing with the missing gap used as a sync point for the ECU. It is not the gap itself that is the trigger point, the ECU uses the first tooth after the missing tooth gap to time the engine. Some in the industry refer to this pattern as a 58x. It is an improved design over the Gen3 24x pattern as it removes issues related to "edge swapping" when large camshafts are fitted. The engine can also half-sync and run from the crank sensor alone also aiding with redundancy.
The camshaft has a 4x tooth pattern with 2x small and 2x big teeth.
LS2 Crankshaft showing crank trigger system
LS2 camshaft sprocket showing 4x trigger system
Crank Sensor
The Gen 4 engine uses a normal Hall Effect Sensor even though many in the industry refer to it as a Reluctor sensor. It is located above the starter motor towards the rear of the engine block. Gen 4 sensors are grey, Gen 3 sensors are black and of a Reluctor type (with internal signal conversion to output as a Hall) and cannot be used with a Gen 4 crankshaft trigger pattern.
| Crank Sensor Pin | Haltech Connection |
| A | Trigger + (Yellow) |
| B | Signal Ground (Blue) |
| C | 12V+ (Red) |
Cam Sensor
The LS2 Cam Sensor is of a normal Hall Effect type. For Gen 4 engines it is located at the front of the engine in the timing cover.
Some have an extension cable.
From the Haltech Terminated Harness Quick Start Guide
Wiring Info for VE Commodore L98 6.0L from the OEM workshop manual