Information Bus

DATA COMMUNICATION SCHEMATICS

Low Speed GMLAN







High Speed GMLAN







Powertrain Expansion Bus (RPO LGH)







Accessory Wakeup







Communications Enable







RPO Codes
VIN L, RPO LGH - Engine Diesel, 8 Cylinder, 6.6L, DI, V8, Turbo, Duramax
VIN 6, RPO LMM - Engine Diesel, 8 Cylinder, 6.6L, DPI, V8, Duramax