Applications GM LS3
Draft. Trigger offset has not been confirmed on a running Race Core install. Pins marked TBD are unknown — do not guess them. A wrong decoder or firing order can destroy the engine.
GM LS2 / LS3 / LS7 (Gen IV)
Gen IV 58x crank (60-2), cam at the front cover on most, DBW on car engines, VVT on many truck and late car engines. Do not use a 24x decoder.
Recommended: Race Core F7. Eight sequential, eight COP, DBW on ETB 1, 58x as 60-2.
- Cylinders: 8
- Displacement: 6162 (LS3) · 5967 (LS2) · 7011 (LS7) cc
- Firing order: 1-8-7-2-6-5-4-3
- Orientation: Same as LS1: 1-3-5-7 left, 2-4-6-8 right, cylinder 1 front-left.
Variants
| Variant | Years | Trigger | Notes |
|---|---|---|---|
| LS2 6.0 | 2005–2007 | 58x + cam | First 58x car engine. DBW. |
| LS3 6.2 | 2008–2017 | 58x + cam | Rectangle port. DBW. EV6 injectors ~42 lb/hr. |
| LS7 7.0 | 2006–2015 | 58x + cam | Dry sump on C6 Z06. Same decoder. |
| L92 / L76 / L99 VVT | 2007-on | 58x + cam + VVT | Cam phaser. Highside 1. |
Recommended pin assignment (Race Core F7)
| Pin | TunerStudio | Function |
|---|---|---|
| B10 | Digital 1 | Crank 58x Hall (grey sensor) |
| B1 | Digital 2 | Cam Hall (front cover on most Gen IV) |
| A3 | Lowside 1 | Injector cylinder 1 |
| A15 | Lowside 2 | Injector cylinder 2 |
| A4 | Lowside 3 | Injector cylinder 3 |
| A16 | Lowside 4 | Injector cylinder 4 |
| A5 | Lowside 5 | Injector cylinder 5 |
| A6 | Lowside 6 | Injector cylinder 6 |
| A7 | Lowside 7 | Injector cylinder 7 |
| A19 | Lowside 8 | Injector cylinder 8 |
| A35 | Ign 1 | Cyl 1 LS truck / D585 |
| A34 | Ign 2 | Cyl 2 LS truck / D585 |
| A22 | Ign 3 | Cyl 3 LS truck / D585 |
| A33 | Ign 4 | Cyl 4 LS truck / D585 |
| A32 | Ign 5 | Cyl 5 LS truck / D585 |
| A31 | Ign 6 | Cyl 6 LS truck / D585 |
| A30 | Ign 7 | Cyl 7 LS truck / D585 |
| A29 | Ign 8 | Cyl 8 LS truck / D585 |
| C20 | Analog Temp 3 | CLT |
| C30 | Analog Temp 2 | IAT |
| C13 | Analog Volt 1 | MAP 0–5 V |
| C24 | Analog Volt 2 | TPS 1 |
| C25 | Analog Volt 4 | TPS 2 (ETB redundant) |
| C17 | Analog Volt 9 | APP 1 |
| C16 | Analog Volt 7 | APP 2 |
| C34 | Knock 1 | Knock bank 1 |
| C35 | Knock 2 | Knock bank 2 |
| A20 | Lowside 10 | Fuel-pump relay coil |
| A21 | Lowside 12 | Main-relay coil |
| A12 | Lowside 15 | Radiator-fan relay coil |
| B7 / B6 | ETB 1+ / ETB 1− | Electronic throttle motor |
| A2 | Highside 1 | VVT bank 1 / intake |
| B17 / B16 | CAN 1 H / L | Dash / wideband |
| B22 / B21 | CAN 2 H / L | Chassis / TCM |
| B18 | Battery Sense | Ignition-switched 12 V (5 A fuse) |
| B23 | +12 V MR | Main-relay 12 V into ECU |
| A17 A18 A24 B14 B19 B20 | Power GND | Engine block → battery − |
| C9 / C21 / C32 | 5 V Sens 1 | MAP, TPS 1, pedal 1 |
| C10 / C22 / C33 | 5 V Sens 2 | TPS 2, pedal 2 |
Trigger
58x is a 60-2 missing-tooth at the crank, Hall sensor (grey). TunerStudio: 60-2 (or GM LS 58x if listed). Cam is a 4x or 1x depending on VVT vs non-VVT — log it. Do not put a black 24x sensor on this reluctor.
Crank
| Pattern | 60-2 (58x). Grey 3-wire Hall. |
| Wiring | 12 V, Digital 1, sensor ground. Falling edge typical — confirm in the log. |
Cam
| Location | Front timing cover on Gen IV car engines. Digital 2. |
TunerStudio
| Setting | Value |
|---|---|
| Wheel type | 60-2 / LS 58x |
| Firing order | 1-8-7-2-6-5-4-3 |
Offset: Light on cylinder 1. 60-2 offset is usually near 0–120° depending on where GM put the gap; light it.
- 60-2_WRONG_POLARITY exists for flipped VR. This sensor is Hall — polarity is edge, not VR+ / VR−.
Injection
High-Z EV6. LS3 ~42 lb/hr. Sequential eight.
| Fuel | Returnless OEM. Add a return on a swap / boost. |
Ignition
Logic COP, Ign 1–8, dwell 2.5–3.0 ms.
| Coils | D585 / D514. |
Idle
DBW. ETB 1, two TPS, two APP, two 5 V rails. No stepper.
First start
- Load the matching variant configuration in TunerStudio before the harness is live — injectors and coils stay disconnected until the decoder is confirmed.
- Fuel pump fuse out. Coils unplugged or spark outputs disabled. Crank. Open Diagnostics → composite / high-speed logger.
- Confirm crank teeth are even, the missing-tooth (or named pattern) is a single clean gap, and cam is one pulse per two crank revolutions for sequential four-stroke.
- RPM during cranking should sit in the 150–350 rpm band. 0 rpm or 12,000 rpm means the decoder is lost — polarity or wheel type, not offset.
- Lock timing to a fixed 10° (idle control off). Timing light on cylinder 1. Change trigger offset until the damper agrees with 10°.
- Recheck at ~3,000 rpm. If timing walks with RPM, it is VR polarity, a delayed Hall, or the wrong decoder — not offset.
- Enable spark. Confirm a healthy burn (timing light or plug colour) with fuel still disabled.
- Enable fuel. Prime, then crank. Catch the first idle on a rich-safe VE, then lean toward stoich at idle.
- Only then enable closed-loop idle, VVT, boost and traction. A base map is a starting point, not a dyno tune.
A base map is a starting point, not a dyno tune.