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How to Reset the AdBlue Warning Light on a GMC Sierra Pickup?

Model: GMC Sierra MK 4 - Years 2014-2018
Part: AdBlue warning light

If the AdBlue warning light has illuminated on the dashboard of your GMC Sierra pickup, it means that the fluid in the emissions system has reached the minimum level and needs to be topped up. This is a very simple and quick operation; let's see how to proceed in this tutorial. First, purchase a 10-liter jug of urea from an auto parts store, then ensure the engine is off and open the hood. Next, locate the blue cap in front of the windshield on the passenger side, unscrew it, and add the necessary amount of fluid to reach the maximum level.

Posted on 16 February 2026 by ScegliAuto

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by ScegliAuto

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