The GMC Sierra HD, produced from 2001 to 2007, was one of the models that's part of GM's full-size lineup. What set this truck apart from its competitors was the inclusion of different luxury trims to its big, powerful, and brute packaging. As good as the vehicle was, it wasn't free of problems. Owners experienced various mechanical issues that risked safety, handling, and control. Despite a short, six-year production span, there are already certain and common issues worth mentioning that needed recalls and service bulletins of the truck. Here are some examples.
The power steering of the GMC Sierra HD is prone to fail because of a power steering hose that's not fit to be used on the truck. A full turn of the wheel to either side, while the stationary, may put too much stress on the system. Push it to its limit, the hose has the tendency to completely break and the power steering fluid to leak out. Steering becomes increasingly difficult because of the extra effort needed to turn the wheel. Fluid coming into contact with the hot engine compartment can cause fires. For some models with advanced brakes, even braking might be compromised as an effect. A quick replacement of the hose with the right one should take care of this problem.
For units with an advanced-wiper system, there is a chance of damaging the electrical wires running to the components because of an overheated circuit board. This is usually signified by an odd smoke or smell from the assembly. If left unattended, a fire may start within the area because of the bad wires. Simple modifications on the wiring setup will prevent this from happening.
The parking brake's friction lining has a tendency to become too thin. Owners may find the truck moving and crashing towards other cars or fixtures despite having the brakes engaged. Depending on the type of brakes used on a certain unit, the GMC dealer should install a clip retainer, or a completely new parking-brake cable assembly to prevent the problem from occurring again.
Replacement fuel filters from the Fram brand may have loose o-rings, gaskets and seals. It is feared that the bad seal may lead to leaks in the system. This has the potential to catch fire if ignited. Fram offers a free replacement of the defective unit as a solution.