Easy lifehacks

What kind of harness do I need for GM Gen3?

What kind of harness do I need for GM Gen3?

Swap Specialties 24x Standalone wiring harness for GM Gen3 4.8, 5.3, 5.7, and 6.0L Engines have proven to be the best harness on the market today. We hand build every harness to fit exactly what your project needs and they actually form fit on the engine to make your wiring look and perform perfectly.

When did the GM small block Gen 3 come out?

The Small Block was the most purchased, modified and swapped engine of all time. The Gen III has now become the predominant swap engine into nearly all Jeep vehicles. Research into what would become the Gen. III began in 1991.

What’s the difference between Gen III and Gen IV LS engines?

The Gen III and Gen IV versions of the LS engines were offered in many pick up, van, SUV and car applications and ranged from 4.8L to 7.0L sizes. The later model versions of this engine, like this 5.3L Chevy engine, feature Active Fuel Management (AFM) to increase fuel economy and decrease emissions.

Can a Gen III engine be pulled with a PCM?

All Gen. III / IV engines are best paired or pulled with the same year of engine and PCM. PCM controlled engines getting a non-electronic automatic transmission should have their PCM programmed as if paired with a manual transmission.

How can I tell if my truck engine is Gen 3 or 4?

The 8th digit of the VIN is “T.” (Circled in red in the attached photo.) From the table below, we can tell that this is a Gen 3, 5.3L, LM7 engine. Here’s a similar table for Gen 4 truck engines.

The Gen III and Gen IV versions of the LS engines were offered in many pick up, van, SUV and car applications and ranged from 4.8L to 7.0L sizes. The later model versions of this engine, like this 5.3L Chevy engine, feature Active Fuel Management (AFM) to increase fuel economy and decrease emissions.

Swap Specialties 24x Standalone wiring harness for GM Gen3 4.8, 5.3, 5.7, and 6.0L Engines have proven to be the best harness on the market today. We hand build every harness to fit exactly what your project needs and they actually form fit on the engine to make your wiring look and perform perfectly.

What kind of engine is a Gen 3 engine?

If it’s a Gen 3 with an iron block and a truck intake manifold and has 6.0 stamped on the block, it’s an LQ4 or LQ9 6.0L engine. If it’s a Gen 3 aluminum block engine with a truck manifold, it’s a 5.3L LM4 or L33 engine.

Author Image
Ruth Doyle