Identify the Year of an ECM or TCM

Fan Relay Module Hook Up

Oil Pressure Gauge Sensor Location

LTx Fan Thermoswitch and Adapter

Identifying the Year of a Gen 5 Harness

Harness Pigtail Connections

How to Identify the Year of Your Transmission

Mixing and Matching Components

L83 L86 LT1 Accelerator Pedal Options

Gen 5 AC Compressor Connectors

Oil Pressure and O2 Connector HInts

Mass Air Flow Sensors for Gen 5 LTx

L83 and L86 Harness Grounds

Easy Cooling Fan Control Solution

No Fuel Rail Pressure Part 2

(Transposition Error)

Cruise Control, Tap Shift, Tow Haul, Transfer Case


Reusing the Gen 5 AC Compressor

What needs to be sent for modification?

No Fuel Rail Pressure Part 1

Fuel Rail Pressure Sensor Differences

Plain English Disclaimer:  Over the years we've presented a ton of information here on this website, in videos, verbally over the phone and in printed instructions and supplements.  We've done our best to test and verify each suggestion made and at the time any information is conveyed it is believed to be accurate.  However GM makes calibration changes to each of their Electronic Modules internal software and hardware systems on an irregular basis.  We will do our best to update and modify the information we convey here on this website in a timely manner once a new challenge is discovered.  In the end, it's up to you the customer to check back here for updates to suggestions and installation techniques and make the appropriate modifications to your installation approach  if needed.

L83 L86 and LT1 Donor Harness

How to Ship, Check-In and Invoicing

Disconnecting L83 L86 and LT1 Connectors

Here's a few short videos based on the regular questions we are asked.  We'll add videos as new questions pop up so check back occasionally for added content.  You can also subscribe to our Youtube channel and receive notification when updates are added at:    

Standalone Harness Youtube Channel