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Chevrolet's GEN III and GEN IV 'LS' engines can be identified by their RPO code. You can determine the RPO code if you have the Vehicle Identification Number (VIN #) from the original/donor vehicle.

 WHICH "LS" ENGINE DO I HAVE

 Not sure what components you have? Click this like for the component ID guide

Click here for the injector Part Number Guide

  1. Locate the 8th digit of the VIN.
  2. Check the tables below to identify your engine.

*Click on the RPO code below to see more details about that engine.*

 GEN 3 / LS CAR ENGINES
8th



Digit of VIN
 RPO



Code
Disp. Common



Name
G LS1 5.7L LS1
S LS6 LS6

 

GEN 3 / VORTEC TRUCK ENGINES
8th



Digit of VIN
RPO



Code
Disp. Common



Name
Iron Block
V LR4 4.8L Vortec 4800
T LM7 5.3L Vortec 5300
Z L59
U LQ4 6.0L Vortec 6000
N LQ9 Vortec HO 6000 or



VortecMax
Aluminum Block
P LM4 5.3L Vortec 5300
B L33 Vortec 5300 H.O.

 

GEN 4 / LS CAR ENGINES
8th



Digit of VIN
RPO



Code
Disp. Common



Name (Notes)
C LS4 5.3L LS4 (FWD only)
U LS2 6.0L LS2
Y L76 L76
2 L77 L77
W LS3 6.2L LS3
J L99 L99
P LSA LSA (supercharged)
T LS9 LS9 (supercharged)
E LS7 7.0L LS7

 

GEN 4 / VORTEC TRUCK ENGINES
8th



Digit of VIN
RPO



Code
Disp. Common



Name
Iron Block
C LY2 4.8L Vortec 4800
A L20
J LY5 5.3L Vortec 5300
0 LMG
4 LMF
K LY6 6.0L Vortec 6000
G L96
Aluminum Block
M LH6 5.3L Vortec 5300
3 or 7 LC9
L LH8
P LH9
H LS2 6.0L LS2
Y L76 Vortec Max
5 LFA Vortec 6000 (hybrid)
J LZ1
8 L92 6.2L Vortec 6200
2 L9H
F L94