Installation Instructions for Chevy/GMC Duramax LML 6.6L Stealth Module (2011-2016)

Included With Purchase

(1x) Stealth Module
(1x) Wire Harness with Fuel Pressure Connections and MAP Connections
(1x) Selector Switch with Dial (if Purchased)
(1x) Two Zip Ties
(1x) Installation instructions

 

Video Installation

 

BEFORE INSTALLING:

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


Locate fuel pressure and MAP sensor connections above.

STEP 2

Pull back gray locking tab on the MAP sensor, depress the black clip and disconnect the factory plug. Referenced above.

STEP 3


Plug the module's MAP connection into the MAP sensor and factory harness. Tug the connector to ensure it's properly connected.

STEP 4

Disconnect the fuel pressure connection located on the driver side valve cover all the way in the back.

STEP 5

Plug the module’s longer clip (male connector) into truck’s fuel sensor that you just unclipped (female connector). Next, plug the module’s shorter clip (female connector) into the truck’s fuel rail (male connector).

STEP 6


Tug on all connectors to ensure they are properly secured.

STEP 7

Clean a flat visible surface under the hood and affix the enclosed CARB EO sticker for SMOG purposes.

ATTENTION:

The module must be removed prior to any service or inspection.

 

 

 

Turn Dial Clockwise

Stock - Low - Medium - High


Low - Towing at or near the vehicles maximum legal tow rating and low traction situations.
*consult your owners manual for vehicle tow rates

Medium - Moderate towing, around the middle of your vehicles tow rating, and ideal for everyday driving situations.

High - Maximum performance. Ideal for empty highway cruising.

The switch must remain plugged into the Stealth Module to remain in the desired setting. Do not switch power levels with the engine running.

You will see the best results when the selector switch is left in one setting for as long as possible.

Check Engine Light or Hard start on Install?

The most common reason for a check engine light on install is due to the truck not being asleep. If the Stealth Module has already been removed, please start the installation process over while giving special attention to the instructions above step 1. If the Stealth Module is still installed, verify connections and disconnect the negative terminals on your battery for a hard reset. Events that will wake the truck up: Not letting it sit for 15 minutes, opening/closing the vehicle door, having the key near the truck during install.

The most common reason for a hard start on install is due to improver connection. Please verify that all connections are straight and pushed in all the way. Be sure the harness is pushed in tight to the Stealth Module as well.

If you are still having trouble, please give our 24/7 tech support a call at (888) 613-4304

Remove the Stealth Module Before Service

Before going in for service, please remove the Stealth Module so that the truck is back to stock. This allows the technician to have a fresh base line when performing any work.