Well now that makes sense.. Heres what I have found out..

AK5-SRS air bags
AP3- ?
AR9- Euro Bucket Seats
A2A-?
B34-front floor mats
B35-Rear floor mats.
B90-Ornament ?
CF5-Power sunroof
CJ3-Manual A/C
DG7-Power mirrors
DH6-Vanity mirrors w/lights
FE2-Ride & handling suspension
FE9-?
FLT-Fleet
FQ3-?
1PB-Trim code?
JB9-Brakes?
JL9-Power front & rear dics w/ABS
K67-Alternator (130A?)
K05-Block heater
K34-Cruise Control
LZ4-Engine code.. 3.5L Lz4 VVT
MX0-Tranny related?
M15-Tranny related?
NP5-Leather wrapped steering wheel
N17-?
NW9-Traction control
OSH-Oshawa #1 Plant?
PY0-Rim, alluminum, 16x6.5
R7K-?
R8N-?
R9B-?
UE1-?
UG1-?
UH8-?
UK3-Electronic something or other..
US8-?
UW6-?
U19-Speedo. KM per H primary.
U77-Rear windown ant.
V73-Front window ant
Z49-Canadian decal package
Z54-Model Conversion
1SA-Option package 01

Z1U-Primary colors and the rest is all paint codes.

Except the BC/CC U218M 83B which from what I can figure out the middle number is the julian date of 27 January 06, M being mornign shift.
Guess Crystal has a birthday too.

 

I'll try and fill a few of them in.


AK5- Restraint System - Seat, Inflatable, Driver and Passanger
AP3- Lock Control Entry - Remote, Keyless Entry, Start
AR9- Seat - Front Bucket, Deluxe
A2A- ?
B34- Covering Front - Floor Mats, Carpeted Insert
B35- Covering Rear - Floor Mats, Carpeted Insert
B90- ?
CF5- Roof, Sun, Glass Sliding, Electric
CJ3- HVAC System - Air Conditioner Front, Manual Temperature Control, Auxilary Temperature Control
DG7- Mirror Outside - Left and Right, Remote Control, Electric, Color
DH6- Morror Outside, Left and Right, Sunshade, Illuminated
FE2- Suspension System - Ride, Handling
FE9- Certification Emission, Federal (not listed under MC, but under Impala)
FLT- Sales Processing - Option
FQ3- Ratio - Transaxle Final Drive 2.86
1PB-?
JB9- Brakes - Light Weight, Disc/Disc
JL9- Brake System - Power, Front and Rear Disc, Antilock, Front and Rear Wheel
K6(G)7 - Alternator - 125 amp
K05- Heater Engine - Block
K34- Cruise Control, Automatic, Electronic (from Impala list)
LZ4- Engine Gas, 6 Cylinder, 3.5L, SFI, V6, Offset Bore, GM
MX0- Merchandised Transmission - Auto Provisions, O/D
M15- Transmission - Automatic 4 Speed, HMD, 4T65-E, Enhanced Electronic
NP5- Steering Wheel - Leather Wrapped
N17- Emission System, Federal, Tier 2
NW9- Traction Control- Electronic
OSH- Plant Code - Oshawa 1, Ontario, Canada
PY0- Wheel, 16x6.5, Aluminum
R7K- ?
R8N- ?
R9B-?
UE1- Communication System - Vehicle, GPS 1
UG1- Opener - Garage Door, Universal
UH8- Cluster - Instrument, Cool Temp, Trip Odometer, TACH
UK3- Control - Steering Wheel, Accessory
US8- Radio - AM/FM Stereo, Seek/Scan, CD, Auto Tone, Clock, ETR, MPS, RDS
UW6- Speaker System - 6, Custom
U19- Speedometer - Instrument, Kilometers and Miles, Kilometer Odometer
U77- Antenna - Rear Windo, Radio
V73- Vehicle Statement - USA/Canada
Z49- Export - Canadian Modified Mandatory Base Equipment
Z54-?
1SA-?

These were derived using the 07 MC/Imp service manuals.

 

Great information.

Thanks.