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1986 Chevrolet G20
-- Select Engine --
Engine Description RPO Code
The drop down menu includes engine codes with descriptions and engine sizes. Please use the following tutorial to locate the actual engine size of your vehicle; it could help you make the correct selection.
  • 6 Cyl 4.3L LB1
  • 6 Cyl 4.3L EFI LB4
  • 8 Cyl 5.0L LE9
  • 8 Cyl 5.0L 4BBL LF3
  • 8 Cyl 5.7L LS9
  • 8 Cyl 5.7L LT9
  • 8 Cyl 6.2L Diesel LH6
  • 8 Cyl 6.2L Diesel LL4
  • 8 Cyl 7.4L 4BBL LE8
-- Select Transmission --
Transmission Description RPO Code
  • 3-Speed Automatic Transmission, THM350C MV4
  • 3-Speed Automatic Transmission, THM400-475/3L80 M40
  • 3-Speed Manual Transmission (Muncie) M62
  • 3-Speed Manual Transmission (Muncie) M64
  • 4-Speed Automatic Transmission, THM700R4/4L60 MD8
  • 4-Speed Manual Transmission (Muncie) M20
  • 4-Speed Manual Transmission (New Process) MY6
-- Select Model Code --
Model Code Description RPO Code
A GM Model Code can be found on both the Service Tag and Service Parts Identification Tag.
  • Van 1/2 Ton Cargo CG11005
  • Van 1/2 Ton Cargo CG11305
  • Van 1/2 Ton Passenger CG11006
  • Van 1/2 Ton Passenger CG11306
  • Van 3/4 Ton Passenger CG21306
  • Van 3/4 Ton Cargo CG21005
  • Van 3/4 Ton Cargo CG21305
  • Van 1 Ton Cargo CG31305
  • Van 1 Ton Cargo CG31605
  • Van 1 Ton Commercial/RV CG31303
  • Van 1 Ton Commercial/RV CG31332
  • Van 1 Ton Commercial/RV CG31603
  • Van 1 Ton Commercial/RV CG31632
  • Van 1 Ton Passenger CG31306
  • Van 1 Ton Passenger CG31606
Parts Question Guide

1986 Chevrolet G20 Parts

Parts and Categories

[-] [+]Frames, Springs, Shocks, Bumpers

[-] [+]Rear Body Structure, Moldings & Trim, Cargo Stowage

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It can be found on the vehicle's title, registration, and insurance papers, driver side of the dashboard near the windshield, and on the driver's side door jamb.
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