In cold weather, the fuel filter may become clogged by wax naturally present in the fuel. To unclog it, move the vehicle to a warm garage area and allow the filter to warm up.
The fuel filter may need to be replaced. See Fuel Filter Replacement (Diesel).
At temperatures belowC (32 F), it is recommended to avoid using biodiesel blends above 5% blend.
This blend may cause fuel filter plugging, system gelling, and freezing that may affect vehicle starting. You may need to turn the ignition on and off a few times before the vehicle will start. Also, idle the vehicle for a couple of minutes before accelerating.
Biodiesel
Water in Fuel (Diesel)#07-02-32-002N: Hydraulic Power Steering System Leak - Required Diagnostic Actions - (Sep 18, 2013) Hydraulic Steering
Subject:Hydraulic Power Steering System Leak – Required Diagnostic ActionsModels: 2005-2014 GM Cars and TrucksEquipped with Hydraulic SteeringThis bulletin has been revised to add the 2014 model year and to change the tool requiredto remove the steering line fitting seals. Please discard Corporat ...