Here's the RPO codes for all the fun stuff. Man, am I geeked...
C6P : GVW RATING, 8600 LBS/3, 900KG
G80 : AXLE POSITRACTION, LIMITED SLIP
GT5 : AXLE REAR, 4.10 RATIO (DUP WITH GT8)
JB7 : BRAKE, POWER, DISC, DRUM 8400 L85
KC4 : COOLING SYSTEM, HEAVY DUTY ENGINE OIL
K19 : REACTOR SYSTEM, AIR INJECTION
K34 : CRUISE CONTROL, AUT0MATIC, ELECTRONIC
K46 : AIR CLEANER, HEAVY DUTY, PRE-CLEANER
K68 : GENERATOR,105 AMP
M40 : TRANSMISSION, AUTO 3 SPD, TORQUE CONV VAR 1
NE2 : FUEL TANK, 151L, 40 GAL
NY1 : SHIELD, FUEL TANK
NY7 : SHIELD, TRANSFER CASE
UA1 : BATTERY, HEAVY DUTY
UY7 : WIRING HARNESS, TRUCK TRAILER HD
V02 : RADIATOR, HEAVY DUTY, WITH TRANS OIL COOLER
XYT/YYT 235/85/16
Z82 : TRAILER PROVISIONS, SPECIAL EQUIPMENT, H.0.