GM Service Manual Online
For 1990-2009 cars only

RPO Code List

B4L

Label Price Refer Geographic Chart

C6L

GVW Rating 20500 lbs

C6T

GVW Rating 23000 lbs

C7P

GVW Rating 16000 lbs

DET

Plant Code Detroit, MI, BOC

ENU

HVAC System Provisions

FE9

Certification Emission, Federal

FSI

Tapered Leaf Front Suspension 7000 lbs

FSL

Air Front Suspension 8000 lbs

GK9

Rear Axle Ratio 4.63

GT4

Rear Axle Ratio 3.73

GXA

Tapered Leaf Rear Suspension 13500 lbs

GZJ

GVW Rating 18000 lbs

G46

Air Rear Suspension 15000 lbs

H09

Dana J175S Rear Axle 15000 lbs

H10

Eaton 15040S Rear Axle 15000 lbs

JE5

Power Antilock Brake System, 4-Wheel Disc

JE6

Air/Hydraulic Brake System, 4-Wheel Disc

JF9

Hydraulic Power Brake System, 4-Wheel Disc

KW1

160 Amp Generator

KYU

200 Amp Generator

K40

Engine Brake Exhaust

K68

105 Amp Generator

LQZ

Power Option, Caterpillar 3116, 6.6 Liter, 230 Gross HP @ 2600 RPM

LRU

Power Option, Caterpillar 3116, 6.6 Liter, 275 Gross HP @ 2450 RPM

LVS

Power Option, Caterpillar 3116, 6.6 Liter, 200 Gross HP @ 2600 RPM

LVZ

Power Option, Caterpillar 3116, 6.6 Liter, 250 Gross HP @ 2600 RPM

LXO

Engine Option, Caterpillar Diesel, 6.6 Liter, 6 Cylinder, Turbocharged

L65

Engine Option, General Motors Diesel, 6.5 Liter, 8 Cylinder, Turbocharged

MTM

Transmission, Allison MD3060, 6-Speed Automatic

MT1

Transmission, THM 4L80-E, 4-Speed Automatic

MT9

Transmission, Allison AT542

NA5

Emission System, Federal, Tier 0

NG1

Certification Emission, Geographically Restricted Registration

NNA

Space Saver Fuel Tank, 80 Gal (303 Liters)

NNB

Fuel Tank, 100 Gal (379 Liters)

Q34

Spare Wheel 19.5 x 6

RO5

Dual Rear Wheels

SNT

Spare Wheel 22.5 x 6

TGK

Solid Color Paint

TNB

Chassis Equipment Raised Frame Height

TNE

Frame 34 Inches Wide

TNF

Side Mounted Radiator w/Hydrostatic FanZ

TNG

Deluxe Steering Wheel w/Center Mounted Controls

TNH

Remote Mounted Air Cleaner Restriction Indicator

TNI

Equipment Side Inl Air Cleaner Elbow

TNJ

Provisions Remote Auxiliary Air Inflation

TNO

Tilt and Telescope Steering Column

VXT

Incomplete Vehicle

WLY

Alcoa Aluminum Wheels, 19.5 x 6, Front and Outer Rear

WLZ

Alcoa Aluminum Wheels, 22.5 x 6, Front and Outer Rear

XTN

Steel Belted Radial Tires, 225/70R19.5, Blackwall, Highway Tread

XTQ

Steel Belted Radial Tires, 245/75R22.5, Blackwall, Highway Tread

XTW

Steel Belted Radial Tires, 8.00R19.5, Blackwall, Highway Tread

YF5

California Emission Certification

YG7

Instrument Package; Gauges, Speedo, Tach, Air Pressure, Fuel, Volts, Coolant Temp, Oil Pressure

YTN

Steel Belted Radial Tires, 225/70R19.5, Blackwall, Highway Tread

YTQ

Steel Belted Radial Tires, 245/75R22.5, Blackwall, Highway Tread

YTW

Steel Belted Radial Tires, 8.00R19.5, Blackwall, Highway Tread

ZTN

Spare Tire, Steel Belted Radial 225/70R19.5

ZTQ

Spare Tire, Steel Belted Radial 245/75R22.5

ZTW

Spare Tire, 8.00R19.5 Steel Belted Radial

002

Axle Ratio 4.11

004

Axle Ratio 4.78

006

Axle Ratio 4.63

036

Axle Ratio 3.36

41P

Wheel Color, Black

5P7

Extended Positive and Negative Battery Cables

5Y2

Instrument Package; Speedo, Tach, Air Pressure, Fuel, Volts, Coolant Temp, Oil Pressure

5Y6

Battery, 1125 Cold Cranking Amps

84P

Wheel Color, Gray