Casting Numbers
GMC - The Numbers Game..check it out!!
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Before you begin your engine project, you need to know exactly what you have—and when it comes to General Motors’ 3rd and 4th generation LS small blocks, that may not be an easy question to answer.
How Do I Know Which LS Engine I Have?
Position twelve all the way to seventeen identify the serial number of your Chevy. This is a unique sequence of numbers that are not standardized, and help to identify the exact assembly line your Chevy came from in addition to when and where it was assembled. CHEVROLET VIN NUMBER LOCATION. The Chevy VIN number is located in a number of areas.
There are more than 40 variations, including the LS-based Vortec truck engines.
Here's a Chevy motor question that comes up all the time - 216 or early 235? Guys are always posting this question. How to identify this early 235 High Torque, digging for numbers and measuring stuff. Attached is a photo of my 1946 High Torque 235 pan which plainly has the number '235' stamped on the right side, big as day. Chevrolet L-6 (in-line 6) Overhead Valve Engines the Stovebolt Six - the Cast-Iron Wonder. Casting codes sequence/serial numbers. The information below was obtained from Block codes and series/sequence codes from Beck's Machine & Tool on Inliners International. Truck sequence/series codes/pre-fixes are nicely presented by John Milliman on The.
The similarities between them make several LS parts interchangeable, but there are critical differences too. To ensure you’re using the the right parts, you need to know which LS engine you’re starting with.
There are two easy ways:
1. The 8th digit of the VIN
2. By visual inspection
The easiest way to tell the difference is to check the 8th digit of the Vehicle Identification Number (VIN) on the original vehicle. (See below.)
If you don’t have the VIN, you can still identify the engine by visual inspection if you know what to look for. The LS experts at Summit Racing created an interactive tool to help you easily make a positive ID by answering a few questions.
Oct 04, 2018 3. Download Saab TIS2008-2. Insert into same physical/virtual CD drive you installed the TIS2000 GM from (drive letter needs to be the same). Launch TIS2000 from desktop icon/start menu 5. TIS2000 should detect available update (Saab TIS-2008). OK this and let it run. If you haven’t installed the USB key and patch do this now. Saab tis 2008 download. TIS Wiring Diagrams – is a description of all electrical circuits of cars with an indication of the installation location of electrical equipment, types of connectors and instructions for repainting individual components. Why you need TIS2000 2008?? I need it because it is the last complete version, which has a SPS programming.
Check out the interactive tool here
Just answer a few basic questions and the tool will be able to tell you what LS engine you have (or at least really narrow down your options).
Please note that this guide is intended for stock engines. If the engine you are looking at has been modified, the guide may not give you the right answer.
How to ID an LS Engine by VIN
Chevrolet’s LS and LS-based Gen III and Gen IV small-block engines are generally known by their RPO code. You can determine the RPO code if you have the VIN from the original vehicle.
- Locate the 8th digit of the VIN.
- Consult the tables below to identify your engine.
[NOTE: Take care not to confuse the letter “B” and the number “8,” or the letter “O” with the number “0.”]
Gen. 3 LS Car Engines
8th Digit of VIN | RPO Code | Displacement | Common Name |
---|---|---|---|
G | LS1 | 5.7L | LS1 |
S | LS6 | 5.7L | LS6 |
Gen. 3 LS Truck Engines (Vortec)
8th Digit of VIN | RPO Code | Displacement | Common Name |
---|---|---|---|
Iron Block | |||
V | LR4 | 4.8L | Vortec 4800 |
T | LM7 | 5.3L | Vortec 5300 |
Z | L59 | 5.3L | Vortec 5300 |
U | LQ4 | 6.0L | Vortec 600 |
N | LQ9 | 6.0L | Vortec H.O. 6000, VortecMax |
Aluminum Block | |||
P | LM4 | 5.3L | Vortec 5300 |
B | L33 | 5.3L | Vortec H.O. 5300 |
Gen. 4 LS Car Engines
8th Digit of VIN | RPO Code | Displacement | Common Name (Notes) |
---|---|---|---|
C | LS4 | 5.3L | LS4 (FWD Only) |
U | LS2 | 6.0L | LS2 |
Y | L76 | 6.0L | L76 |
2 | L77 | 6.0L | L77 |
W | LS3 | 6.2L | LS3 |
J | L99 | 6.2L | L99 |
P | LSA | 6.2L | LSA (Supercharged) |
T | LS9 | 6.2L | LS9 (Supercharged) |
E | LS7 | 7.0L | LS7 |
Identify Your Engine | Perkins
Gen. 4 LS Truck Engines (Vortec)
8th Digit of VIN | RPO Code | Displacement | Common Name |
---|---|---|---|
Iron Block | |||
C | LY2 | 4.8L | Vortec 4800 |
A | L20 | 4.8L | Vortec 4800 |
J | LY5 | 5.3L | Vortec 5300 |
0 (zero) | LMG | 5.3L | Vortec 5300 |
4 | LMF | 5.3L | Vortec 5300 |
K | LY6 | 6.0L | Vortec 6000 |
G | L96 | 6.0L | Vortec 6000 |
Aluminum Block | |||
M | LH6 | 5.3L | Vortec 5300 |
3 | LC9 | 5.3L | Vortec 5300 |
L | LH8 | 5.3L | Vortec 5300 |
P | LH9 | 5.3L | Vortec 5300 |
H | LS2 | 6.0L | LS2 |
Y | L76 | 6.0L | VortecMax |
5 | LFA | 6.0L | Vortec 6000 (Hybrid) |
J | LZ1 | 6.0L | Vortec 6000 (Hybrid) |
8 | L92 | 6.2L | Vortec 6200 |
2 | L9H | 6.2L | Vortec 6200 |
F | L94 | 6.2L | Vortec 6200 |
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NOTE: You can find engine specs and detailed engine upgrade advice for every LS and LS-based Vortec truck engine in one place: The Definitive Guide to LS Engine Specs and LS Engine Upgrades.