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Installation Instructions for Chevy/GMC Duramax L5P Stealth Module (2017-2019)

Included With Purchase

(1x) Stealth Module
(1x) Wire harness with sensor connections
(2x) Zip ties
(1x) Install instructions
(1x) Selector switch if purchased

Step by Step Instructions

Be sure your truck has been off for at least 10 minutes before installing the module to allow computer to "sleep" and for your engine compartment to cool down. This way it will not detect an interruption when you unplug your sensor.

First Option

Step 1:

Locate the sensor connections shown below.

Sensor Connections


Step 2:

Disconnect the factory plug - the red locking latch must be pulled back on the plug before it can be released.

Step 3:

Connect the module's harness plug into the factory harness receptacle. Push the red locking latch forward to secure the connection.


Step 4:

Connect the factory harness plug into the module’s harness. Push the red locking latch forward to secure the connection.

Step 5:

Route the module’s harness towards the passenger side fender well.

Step 6:

Connect the module into the harness.

Step 7:

Connect the selector switch into the module’s harness. (Run into the cab or leave tied up with the module under the hood).

Switch Connection

Step 8:

Secure the module as desired (with zip ties provided or velcro, etc.) away from heat/moving parts.

Video Installation


If You Get a Check Engine Light or Hard Start Upon Installation:

Please check the connection between the truck’s wire harness and the module’s female plug and ensure it was connected properly. Improper installation will cause a CEL/hard starting.

Remove The Module Before Service Work

If you need to take your vehicle in for service work, REMOVE the module before work is performed.

If you have any issues, please contact our Technical Support or text to 603-309-6370

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