RPO CODES 1973 - 1987
(Regular Production Option)
BY NO MEANS IS THIS LIST EVEN CLOSE TO COMPLETE!
AO1 - Softray Tinted Glass
AO1 - Tinted Glass All Windows
A28 - Sliding Rear Window
A31 - Power Windows
A80 - Pick Up Box Bed Rails
AN1 - Folding Seat Back
AU3 - Power Door Locks
B32 - Color Keyed Front Floor Mats
B3J -Diesel Equipment
B84 - Black Body Side Moldings (Fleetside Only)
B85 - Bright Body Side Moldings (Fleetside Only)
B93 - Door Edge Guards
B96 - Wheel Opening Moldings
C42 - Heavy Duty Front Heater (Not Available with RPO C60 A/C)
C60 - Air Conditioning
C91 - Dome Lamp
C1A -Blazer with white convertible soft top
C1B - Blazer with black convertible soft top
C1C - Blazer with blue convertible soft top
C1D - Blazer with buckskin convertible top
CD4 - Intermittent Windshield Wiper System
D44 - Painted Below Eyeline Mirrors
D45 - Stainless Steel Below Eyeline Mirrors
D73 - Pickup Box Side Rails
DF2 - Camper Style Stainless Steel Mirrors
DG4 - Extended Below Eyeline Mirrors
DG5 - Senior West Coast Style Painted Mirrors
E62 - Stepside Pick Up Box
E63 - Fleetside Pickup Box
E81 - Wood Floor Fleetside Pickup Box
F44 - Big 10 Model
F51 - Heavy Duty Shock Absorbers
F60 - Heavy Duty Front Springs (Came With HD Front & Rear Shocks Recommended For Snow Plow Use On 1/2 Ton Trucks)
G50 - Rear Heavy Duty Springs
G51 - Rear Extra Capacity Springs
G60 - Rear Main And Auxiliary Springs (30 model series only)
G80 - Locking Rear Differential
GT4 - 3.73 Rear Axle Gear Ratio
GT5 - 4.10 Rear Axle Gear Ratio
HC2 - 2.76 Rear Axle Gear Ratio
HC4 - 4.56 Rear Axle Gear Ratio
HC8 - 3.21 Rear Axle Gear Ratio
HE3 - 3.07 Rear Axle Gear Ratio
HO4 - 4.11 Rear Axle Gear Ratio
J55 - Heavy Duty Power Brakes
K22 - 94 Amp Alternator
K30 - Speed & Cruise Control
K34 - Electronic Speed Control
K43 - Poly Wrap Air Cleaner
K81 - Cold Climate Package (Including Special Insulation, 66 Amp Alternator, Special Heater & Defroster, Engine Block Heater, HD Battery.)
KC4 - Engine Oil Cooler
KO5 - 600 Watt Engine Block Heater
LE8 - 7.4 Liter V 8
LE9 - 5.0 Liter V 8
LF3 - 5.0 Liter V 8
LF4 - 400 4bbl V 8 Engine
LG9 - 305 2bbl V 8 Engine
LO5 - 5.7 Liter V 8
LS9 - 350 4bbl V 8 Engine
M15 - 3 Speed Manual Transmission
M20 - 4 Speed Manual Transmission (Chevrolet CH465)
M40 - Turbo Hydra-matic Transmission
MX0 - TH 700 Transmission
MX1 - TH 350 Transmission
N31 - Custom 16" Steering Wheel
N33 - Comfortilt Steering Wheel
N41 - NP 203 Fulltime 4wd Transfer Case
N67 - Rally Wheels (1/2 Ton Trucks Only)
N90 - Aluminum Cast Wheels
NK7 - 31 gallon Fuel Tank
NL2 - Auxiliary Fuel Tank (pick ups)
NY1 - Fuel Tank Shield
NY7 - Transfer Case Shield (Skid Plate)
P11 - Glide Out Spare Tire Carrier
P13 - Side Mounted Spare Tire Carrier (Fleetside Only)
PO1 - Bright Wheel Covers (1/2 Ton Trucks)
PA1 - Bright Metal Wheel Covers (3/4 Ton Trucks)
RO5 - Dual Rear Wheels ( 1-Ton Trucks Only)
TP2 - 3500 Watt Aux. Delco
TT5 - Halogen High Beam Headlamps
U01 - Roof Marker Lamps
U16 - Tachometer
U35 - Quartz Electric Clock
U37 - Cigarette Lighter
U58 - AM/FM Stereo Radio
U63 - AM Radio
U69 - AM/FM Pushbutton Radio
U69 - AM/FM Radio
U76 - Windshield Antenna
UA1 - Heavy Duty Battery
UF2 - Cargo Lamp
UM6 - AM/FM Stereo Radio With Seek, Scan, Stereo Cassette Player & Clock
UN3 - AM/FM Stereo Radio With Stereo Cassette Player
UY7 - Trailer Light Wiring Harness
VO1 - Heavy Duty Radiator
VO2 - Transmission Oil Cooler
V22 - Chrome grille
V31 - Chrome Front Bumper Guards
V42 - Chromed Rear Step Bumper (Fleetside Only)
V43 - Painted Rear Step Bumper
V76 - 2 Front Tow Hooks
VF1 - Chromed Rear Bumper
VR2 - Dead Weight Trailer Hitch
VR4 - Weight Distributing Trailer Hitch
X6Z - Automatic Front Locking Hubs
YE9 - Silverado Trim Package
YG1 - Custom Package (Fleetside Only) Including Bright Wheel Opening Moldings, RPO #'s B84, B96, & Bright Trim For Side Marker Lamps & Tail Lights.
YG3 - Deluxe Package Including Bright Trim For Side Marker Lamps & Tail Lights.
YG4 - Means rear seat not desired (Bonus Cab, Crew Cab, Blazer, Suburban).
YJ6 - Decor Value Package
YWF - 10 x 16.5/ Load Rating "D" Tubeless Tires
Z53 - Gauge Package (Including Voltmeter, Engine Coolant Temp, 66 Amp Alternator)
Z56 - Cold Climate Package
Z58 - Blazer white hard top
Z59 - Blazer black hard top
Z62 - Scottsdale Trim Package
Z84 - Cheyenne Trim Package
Z75 - Front Quad Shock Absorbers (Dual Shocks)
Z81 - Camper Special Chassis Equipment
Z82 - Trailering Special Package
Z84 - Cheyenne Trim Package
ZQ2 - Operating Convenience Package Including AU3 Power Door Locks & A31 Power Windows
ZY1 - Solid Paint
ZY4 - Deluxe 2-Tone Paint
ZY5 - Exterior Decor Package
This is by no means a complete list. It's a good start though! There were many options offered over the years. Some of these codes were different for various years, and changed over the years too. I will be adding to this list as I get more info.
I make no claims that they are 100% accurate in every way.
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