Common Symptoms Decreased Fuel Efficiency A malfunctioning EGR valve, especially if stuck open, can reduce engine efficiency, leading to lower fuel economy. Poor Engine Performance Symptoms like loss of power, rough idling, and hesitation during...

Common Signs of a Faulty Air Dryer Excessive Water in Air Tanks If you notice significant water draining from the air tanks when using the drain valves, the air dryer filter may need replacing. Filter...

Takeaways from the Haldex guide are: 4515 style brake shoes have a hump on the web (the web is the center rails that hold the roller pins and hardware), but 4707 style brake shoes DO NOT have...

The truck is not moving Transmission is in neutral Parking brake is set The following steps are all completed using the buttons on the steering wheel Press the ↵ button, scroll through the top menu...

1. Coolant loss and internal coolant leak One of the most common symptoms of a failing EGR cooler is coolant loss. This can be caused by a leak in the EGR cooler itself or in...