Installation Instructions

Colorado/Canyon Duramax LWN 2.8L Stealth Module


Included With Purchase

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

Video Installation

Step by Step Instructions

Be sure your truck has been off, with the hood unlatched and key fob located away from the vehicle for at least 15 minutes before installing the module. Key fob needs to continue to stay away from the vehicle for the entire installation process. This allows the computer to 'sleep' and for your engine compartment to cool down. It also helps mitigate your ECM from detecting an interruption in a sensors electrical circuit.

Step 1

Remove the oil fill cap and two T30 Torx screws that attach the engine cover.

Step 2

When removing the cover, disconnect the oil line clip.

Step 3

Remove the thermal molded insulation from the engine.

Step 4

Disconnect the factory harness female plug from the pressure sensor. Release the locking tab to allow the release of the plug.

Step 5

Plug factory harness female plug into module harness male receptacle. Plug module harness female plug into the pressure sensor.

Step 6

Re-install all components removed to obtain access to the engine fuel rail. Do not forget to re-attach the oil line clip.

Step 7

Find a suitable location for the module. Driver's side is good. Secure the module with zip ties provided or with Velcro. Plug module harness into the module. Plug the selector switch harness into the module harness.

Step 8

Mount module away from hot and/or moving parts.

How The Selector Switch Works

The dial going clockwise:

Stock - Low - Medium - High

Low: Towing heavy and low traction situations.

Medium: Moderate towing and ideal for everyday driving situations.

High: Maximum performance - ideal for empty highway cruising.

The switch must remain plugged in to stay in the desired setting. You can run the switch into the cab or leave it tied up under the hood. Leave in one setting as much as possible.

Everyone has different driving preferences, it’s suggested that you try each setting for at least a week to see what you prefer.

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 call us at (888) 613-4304

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