How to locate and read a GM forklift engine serial number

Step 1: Locate the number on the engine block

The serial number of your GM forklift engine will be in a location specific to your model of engine. Below are diagrams showing locations for 2.5/3.0L L-4, 4.3L V-6, small block V-8, and big block V-8 engines, respectively. The big block V-8 engine has two diagrams, indicating serial number location for models both before and after 1991.

We sell new GM 4.3 and GM 2.4 liter engines for forklift applications!

2.5/3.0 L L-4 engine
2.5/3.0L L-4 engine
4.3L V-6 engine
4.3L V-6 engine
small block V-8 engine
small block V-8 engine
big block V-8 engine, pre-1991
big block V-8 engine, pre-1991
big block V-8 engine, 1991 and on
big block V-8 engine, 1991 and on

Step 2: Interpret the number

Once you have located the serial number, you can derive from it information about your forklift engine. As shown in the diagram below, the first letter indicates the source code of the product. The next four digits indicate the month and day the engine was produced, and the last three digits are the engine’s type code.

interpreting your serial number
interpreting your serial number

More about GM engines

A variety of forklift manufacturers have used GM engines in the past.

Hyster‘s history with GM engines goes back many years, all the way back to the 2.4 liter engine as well as the 3.0 “iron duke”, and the 350/4.3 engine.  When the parent company of Yale, “Nacco” purchased Hyster Company, Yale began using GM engines as well.  Recently Nacco has moved away from GM engines to Kubota.

Toyota uses GM engines as well, believe it or not.  The automotive rivals work together somehow as Toyota uses the 4.3L engine.  Toyota did use the 3.0 liter engine for a brief period but it no longer does so in 2015.

Mitsubishi/Caterpillar Forklift uses the GM 4.3 engine in its 8000-12000 pound capacity lift trucks.

SIS forklift radar

Looking for parts for GM engines used in forklifts?  Intella can help.  We carry tune up parts, cooling / water pumps, starters, alternators, distributors, filters, and general rebuild parts.  We know GM engines and we can help you determine what you need.  If you can’t figure out from our website what you need to order, please call us at 616-796-1288.


Post by Intella Parts Company, LLC

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One thought on “How to locate and read a GM forklift engine serial number”

  1. Hello have a GM engine 262 V6 with the number T 01074 LB. I have figured out everything but the LB. Anybody know what it stand for?

    Karsten Busk Larsen