RPO Codes - Reverse Engineer

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

BuiltToWork

I'm Awesome
Joined
Nov 28, 2022
Messages
266
Reaction score
635
Location
Stafford, VA
I bought the truck very well used and I can't find any RPO codes except for a small placard on the fire wall.
Doing Research I started re-building the factory original RPO list and this is what I have come up with so far:
(might be wrong on a couple)
(Also - I can't figure out the FLR code)

K30903/E63
GVWR 10,000lbs
CK31003
FLR
ZW9
34 gallon fuel tank, left


R05 - Dual Rear Wheels - Includes U01 Lamps and MX1 Trans and V02 Heavy Duty Radiator and Transmission Oil Cooler
ZY1 - Solid Paint
L19 - 7.4 liter V8 EFI
D45 - Stainless Steel Mirror, 9" x 6.5"

MX1 - 3 Speed Auto
3.73 - Requires V02 HD Cooling
4.10 - Requires 7.50-16D Tires
4.56 - Requires KC4 Engine Oil Cooler and 7.50-16D Tires and V02 HD Cooling

Borg Warner 1370 - Required with R05

GM 7500 FF - 14bolt rear end 3.49 x 4.95 (thick)

R05 Tires:
XHR Front On/Off Road, Steel Belted Radial LT225/75R16D 2335lbs 65psi
16 x 6.5, 8, 6.5, 17mm offset 706 RPM @ 45mph
YHR Rear On/Off Road, Steel Belted Radial LT225/75R16D 2335lbs 65psi
16 x 6.0, 8, 6.5, 127mm offset 706 RPM @ 45mph

*could be XDE/YDE (Highway) or XDL/YDL (On/Off Road) if Rear not equal to 3.73
XDL Front On/Off Road, Nylon 7.50-16D 2140lbs 60psi
16 x 6.0, 8, 6.5, 127mm offset 652 RPM @ 45mph
YDL Rear On/Off Road, Nylon 7.50-16D 2140lbs 60psi
16 x 6.0, 8, 6.5, 127mm offset 652 RPM @ 45mph


R05 Suspension:
Front Torsion Bar 3750
Front Shocks 32mm
Front Stablilzer Bar 1"
Rear Leaf Comb Semi-Elliptic 2 Stage Main/Aux 7500lbs 6+1 leafs 4.86 thick
Rear Shocks 32mm

Brakes:
10,000 GVWR
Hyd. Power
Front Rotor 12.5x1.26 42.24 contact
Rear Drum 13.0 x 3.5 166.04 contact
JB8 or JD3 or JD6

Battery:
630 CCA
TP2 2nd Batt 540 CCA
C60 OPT Alternator 100a 36amp at idle 3.7:1 pully CS130


Trans:
MX1 3 Speed Transmission
KC4 OPT engine oil cooler
V02 OPT transmission oil cooler 5 x 20 x 2.56 fan blades/diameter/pitch
V02 POT HD Radiator 2.17 thick 6.2 gallon cap
C60 OPT Air Conditioning

V10 Cold Cliamte package, block heater, special insulation and antifreeze to -32

U01 Roof Lighting
C95 Dome Light OR TR9

NZZ Skid Plate

???

F44 HD Chassis
F60 heavy duty torsion bars
Z82 Trailering Special, UY7 Wiring, VR4 Hitch, V02 Trans Oil Cooler and F51 Shocks and KC4 Cooler
P06 Dual Rear Wheel Trim Rings


You must be registered for see images attach
 

Attachments

  • IMG_0843.pdf
    234.2 KB · Views: 7

RichLo

E I E I O
Joined
Jan 6, 2015
Messages
3,653
Reaction score
5,661
Location
Wisconsin
Nicely done

I'm surprised it had such a small battery from the factory, especially with the cold weather package. Thats the same battery my 1.4l Chevy Cruze had from the factory and it was a slow starter in sub-0 weather. I cant imagine it trying to spin a cold 454!
 

BuiltToWork

I'm Awesome
Joined
Nov 28, 2022
Messages
266
Reaction score
635
Location
Stafford, VA
I don’t think compine.com will have that much information for a 1990.
I have tried most of the free vin decoders, here is the best info I found so far (I don't think I will get much more):

1GBHK34N8LE219367
Information provided below is based on the details provided by the manufacturer of this vehicle to NHTSA in the part 565 submittal

Gross Vehicle Weight Rating: Class 2H: 9,001 - 10,000 lb (4,082 - 4,536 kg)
Cylinders: 8Drive Type: 4WD/4-Wheel Drive/4x4
Primary Fuel Type: GasolineEngine Model:
Secondary Fuel Type:Engine Brake (HP):
Engine Manufacturer: CPCTransmission Speed:
Transmission Style:Cab Type:
Bed Type:Engine Displacement (L): 7.4
Plant Information: NA - Truck Platform, PONTIAC, MICHIGAN, UNITED STATES (USA)

Manufacturer: GENERAL MOTORS LLC

DBAs:

Vehicle Type: INCOMPLETE VEHICLE

Model Year: 1990

Make: CHEVROLET

Model: GMT-400

Body Class: Incomplete - Chassis Cab (Number of Cab Unknown)
 

Caman96

OEM Baby!
Supporting Member
Joined
Jul 17, 2020
Messages
6,991
Reaction score
13,595
Location
The Hub
I have tried most of the free vin decoders, here is the best info I found so far (I don't think I will get much more):

1GBHK34N8LE219367
Information provided below is based on the details provided by the manufacturer of this vehicle to NHTSA in the part 565 submittal

Gross Vehicle Weight Rating: Class 2H: 9,001 - 10,000 lb (4,082 - 4,536 kg)
Cylinders: 8Drive Type: 4WD/4-Wheel Drive/4x4
Primary Fuel Type: GasolineEngine Model:
Secondary Fuel Type:Engine Brake (HP):
Engine Manufacturer: CPCTransmission Speed:
Transmission Style:Cab Type:
Bed Type:Engine Displacement (L): 7.4
Plant Information: NA - Truck Platform, PONTIAC, MICHIGAN, UNITED STATES (USA)

Manufacturer: GENERAL MOTORS LLC

DBAs:

Vehicle Type: INCOMPLETE VEHICLE

Model Year: 1990

Make: CHEVROLET

Model: GMT-400

Body Class: Incomplete - Chassis Cab (Number of Cab Unknown)
I got one for you.
Let me guess, your truck is green. For some reason this site always lists color as yellow for green trucks.
 

BuiltToWork

I'm Awesome
Joined
Nov 28, 2022
Messages
266
Reaction score
635
Location
Stafford, VA
I got one for you.
Let me guess, your truck is green. For some reason this site always lists color as yellow for green trucks.
Wow, never had the yellow come up before, but makes sense since it was built without a bed, probably sold to the state or school system.
I'll have to scratch the paint somewhere to see if there is yellow (or green) under the white.
Thanks Caman.
 

Caman96

OEM Baby!
Supporting Member
Joined
Jul 17, 2020
Messages
6,991
Reaction score
13,595
Location
The Hub
Wow, never had the yellow come up before, but makes sense since it was built without a bed, probably sold to the state or school system.
I'll have to scratch the paint somewhere to see if there is yellow (or green) under the white.
Thanks Caman.
I’m betting it’s green. Gives you the FLR code(ZW9) though.
 
Last edited:

BuiltToWork

I'm Awesome
Joined
Nov 28, 2022
Messages
266
Reaction score
635
Location
Stafford, VA
So FLR means paint color? I looked up RPO code Zw9 which is: Chassis Cab, BCM program for no turn signal outage detection. which makes sense, but could never figure out FLR
 
Top