1985 VIN Number Breakdown: Available Engines in 1985

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1985 VIN Number breakdown Available Engines in 1985
Available Transmissions in 1985 1985 Rear Axle and Gear Identification 1985 IROC-Z Dimensions 1985 Computer Trouble Codes
1985 Exterior Color Information 1985 Interior Color Information 1985 Factory Options (RPO's) View the 1985 Showroom Brochure 1985 IROC-Z Key Points of Interest

-------------------------------------------------------------------------------- 1985 Total Produced (RPO B4Z) 21,177
Dealership Sticker Price $15,800

1985 VIN Breakdown Example: 1G1FP87H6FN100001
1
G 1 FP 87 H 6 F N 100001
1st Digit 2nd Digit 3rd Digit 4th & 5th Digits 6th Digit 8th Digit 9th Digit 10th Digit 11th Digit 12-17 Digits Nation of Origin

1=USA

2=Canada
Manufacturer
G=General Motors
Division
1= Chevrolet

7= GM of Canada
Carline/Series
FP=Sport Coupe or Z28
Body Type & Restraint System
87=Coupe 2dr Sport
Engine Code
See Below
Check digit VIN position Model Year 1985
Assembly Plant Code
N-Norwood, Ohio

L-Van Nuys, Cal.
Number in line at assembly plant
1xxxxx--Norwood

4xxxxx--Van Nuys

Available Engines in 1985
RPO #
Liter Injection C.I.D. H.P. Rating Engine Code # Produced
LG4 5.0 Carbureted 305ci 155hp H 63,052
L69 5.0 Carbureted 305ci 190hp G 2,497
LB9 5.0 Tuned Port 305ci 215hp F 32,836

Available Transmissions in 1985
RPO #
Type Specifications ID # Produced
MXO Auto 4 Speed with OD 700R4 152,600
Man 76mm 4 Speed
Man 83mm 4 Speed
Man 77mm 4 & 5 Speed

1985 Rear Axle and Gear Identification

The code to identify your axle gear is located on the front face of the right hand axle tube about three inches from the differential cover.
Number Decode

A typical code could be 8PS 0 103 2 - The initial number and next two letters (8PS) indicate the axle code, here a 1985 Posi with a 3.73 axle ratio. The next number or letter (0) identifies the manufacturer, the next three digit number (103) indicates the date of manufacture, and the final digit (2) indicates the shift that this rear was produced.

Axle Code
Axle Ratio
Axle Type

8JA 3.08 Standard
8JB 3.23 Standard
8JC 3.42 Standard
8JD 3.73 Standard
8JP 3.08 Posi
8JQ 3.23 Posi
8KA 3.42 Standard
8KB 3.73 Standard
8KR 3.08 Standard
8PP 3.08 Posi
8PQ 3.23 Posi
8PR 3.42 Posi
8PS 3.73 Posi

1985 Dimensions

Length Height Width Wheelbase
187.8 Inches 49.8 Inches 72.0 Inches 101.0 Inches

1985 Computer (ECM) Trouble Codes

There is a way to read the codes by counting the flashes, but I would recommend simply going to some auto parts store and buying a GM code reader that plugs into your car. They are around $20.00

Code
Circuit or System
Probable Cause

12 No distributor reference pulse This code will flash whenever the diagnostic terminal is grounded with the ignition On and the engine not running. If additional trouble codes are stored, they will appear after this code has flashed three times. 13 Oxygen Sensor Circuit Sticking Throttle Position Sensor; Poor electrical connection; open or short circuit; defective oxygen sensor; defective ECM. 14 Coolant Temperature Sensor Circuit Engine overheating; poor electrical connection, open or short in circuit; defective coolant temperature sensor; defective ECM. 15 Coolant Temperature Sensor Circuit Poor electrical connection, open or short in circuit; defective coolant temperature sensor; defective ECM. 21 Throttle Position Sensor Sticking or misadjusted TPS; poor electrical connection, open or short in circuit; defective TPS; defective ECM. 22 Throttle Position Sensor Sticking or misadjusted TPS; poor electrical connection, open or short in circuit; defective TPS; defective ECM. 23-Carbureted Models Mixture Control Solenoid Open circuit or short to ground in the mixture solenoid circuit; defective ECM-if the mixture control solenoid is shorted to ground,...
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