FAQs
Do I need an aftermarket lift pump to use the fuel pressure gauge on my 2014–2019 Duramax?
It depends on which engine your truck has. For 2014–2016 LML Duramax models, the factory fuel system is vacuum-driven, meaning the CP4 injection pump draws fuel from the tank under vacuum rather than using a factory supply pump to create positive pre
Do you offer an installation video for the 2014–2019 Duramax Silverado/Sierra?
Yes. We offer an installation video guide for the 2014–2019 Duramax Silverado/Sierra platform to help walk you through the fuel pressure gauge installation process. You can view the installation video here:Fuel Pressure Gauge Installation Video
Do I need to drill and tap to install a boost gauge on a 2014–2019 Duramax, or are there other options?
Drilling and tapping the intake manifold is not required, but it is one available method of installing a boost gauge on a 2014–2019 Duramax Silverado/Sierra. If you choose this route, a 1/8-27 NPT drill and tap kit can be used for the installation. A
What transmission temperature sensor adapter options are available for a 2014–2019 Duramax Silverado/Sierra?
For the 2014–2019 Duramax equipped with the Allison transmission, there are two main installation options for a transmission temperature sensor:. Diagnostic (Test) Port Adapter. Connects to the factory “Diagnostic Pressure Port” on the Allison transm
What should I set the switches to on my fuel rail pressure gauge for a 2014–2019 Duramax Silverado/Sierra?
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.