What should I set the switches to on my fuel rail pressure gauge for a 2014–2019 Duramax Silverado/Sierra?Updated an hour ago

The switch settings for your GlowShift fuel rail pressure gauge vary depending on the exact model year and engine configuration of your 2014–2019 Duramax. These settings calibrate the gauge so it can correctly read factory fuel rail pressure signals.

• 2012–2014, 2016 (6.6L Duramax)

  • Yellow / Orange-Black wires

  • Both switches in the UP position

• 2015 (6.6L Duramax)

  • Blue / Green wires

  • Black wire

  • Both switches in the DOWN position

• 2017–2019 (6.6L Duramax)

  • Blue / White wires

  • Black / Green wires

  • Both switches in the DOWN position

Incorrect switch settings may result in inaccurate readings or improper gauge operation, so always verify your model year and wiring configuration before installation.