6.2L LS3 V8 · Ignition
LS3 Ignition Specifications
The numbers a tune-up needs: firing order, spark-plug gap and torque, and the resistance range for the plug wires. The LS3 uses coil-near-plug ignition with one coil per cylinder, so there is no distributor to time.
Firing Order 1-8-7-2-6-5-4-3
Spark Plug Wire Resistance 397–1,337 ohms
Spark Plug Torque 15 N·m 11 lb ft
Spark Plug Gap 1.02 mm 0.040 in
Spark Plug Type Refer to Electronic Parts Catalogue
Sources
- GM Service Information: Ignition System Specifications (6.2L LS3), Document ID 1704273
Values are cited as facts. We do not reproduce the manufacturer's prose, table layout, or diagrams.