GDP - logo2011-2016 lml Duramax
Rotary switch
USER MANUAL

Disclaimer

By installing this product onto your vehicle, you assume all risk and liability associated with its use.
GDP Tuning, LLC. is not responsible for misuse of its products. By installing this product, you release GDP Tuning, LLC. of any and all liability associated with its use.
The purchaser and end user releases, indemnities, discharges and holds harmless GDP Tuning, LLC. from any and all claims, damages, causes of action, injuries, or expenses resulting from or relating to the use or installation of this product that is in violation of the terms and conditions on this page, the product disclaimer, and/or the product installation instructions. GDP Tuning, LLC. will not be liable for any direct, indirect, consequential, exemplary, punitive, statutory, or incidental damages or fines caused by the use or installation of this product.

Caution
Never work on a hot vehicle. Serious injury in the form of burns can result if the vehicle has been in use. Allow vehicle to cool prior to installation. Always wear eye protection when working on or under any vehicle.

GDP410017

GDP 2011 2016 lml Duramax Rotary Switch -

 

A. Loomed electrical wires
B. Dial stickers
C. Switch control board
D. Switch knob
E. Allen Wrench

Step 1
Unplug the connector closest to the fire wall on the ECM.

GDP 2011 2016 lml Duramax Rotary Switch - connector

Step 2
Route connector through the wheel-well, remove the plastic top cover and pin retainer.

GDP 2011 2016 lml Duramax Rotary Switch - connector1

Step 3
Route switch through firewall. Locate pin 11 & 35 & push out the plastic plugs from the top side down. 2011 Duramax’s will sometimes have a yellow wire in pin 11, that wire is okay to remove or piggyback off of the SOTF wire.

GDP 2011 2016 lml Duramax Rotary Switch - connector2

Step 4
Insert the purple wire into pin 11.
Insert the ground wire into pin 35.

GDP 2011 2016 lml Duramax Rotary Switch - pin

Step 5
Reinstall top cover and bottom retainer. Use a zip tie to secure the loom from your switch to the ECM harness. Feed the harness back through the fender and into position. Reconnect the harness on the ECM, ensure that locking mechanism fully cams over. Slide the red lock tab to reengage the lock.
Notice:
Proper switch pin position between the 5th and 6th slot.

GDP 2011 2016 lml Duramax Rotary Switch - switch

Troubleshooting:

To troubleshoot your switch, you will need to use EFI Live software or similiar software to verify that the Fuel Temp Sensor is changing by 10 Degrees for every level.

Level 1 10°C
Level 2 20°C
Level 3 30°C
Level 4 40°C
Level 5 50°C

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Documents / Resources

GDP 2011-2016 lml Duramax Rotary Switch [pdf] User Manual
2011-2016 lml Duramax Rotary Switch, Duramax Rotary Switch, Rotary Switch, Switch

References

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