GMC Sierra: Fuel System

Affects GMC Sierra · 2012–2013 — about 342 vehicles.

The hazard

On certain pickup trucks equipped with a 6.6L diesel engine and dual fuel tanks, the fuel tank transfer pump may malfunction, stopping the transfer of fuel from the rear tank to the front tank. This could cause the fuel gauge to display an inaccurate reading, and cause the front tank to become empty while fuel remains in the rear tank. This could result in engine stalling which, in conjunction with traffic, road conditions, and driver's reactions, could increase the risk of a crash causing injury and/or property damage. Correction: Dealers will replace the fuel transfer pump.

What to do

Contact your dealer; the remedy details were not included in the filing.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational