The Hawk Performance HB705P.776 is a rear disc brake pad set from the brand's SuperDuty line, built on a ferro-carbon friction compound and listed at 0.776 inch pad thickness for GM heavy-duty trucks and vans. The formulation was originally designed for heavy-duty and military applications, which gives this street-legal pad a severe-duty pedigree that most factory pads lack.
Stock pads are sized for ordinary commuting, so a loaded 3500 towing a trailer down a long grade can overheat them and lose bite. This compound is positioned for that job: SuperDuty pads are designed to deliver maximum stopping power while not fading at very high temperatures. Cheaper pads may cost less up front, but they are not built around that heat tolerance. Published data also lists compatibility with stock, slotted, and cross-drilled rotors, so you can keep your existing rotor setup without a rotor swap.
Fitment is the first thing to verify. Published application lists for this part differ in model years, rear-wheel configuration, and engine, so confirm your exact year, model, and single or dual rear wheel setup with the manufacturer before ordering. For the install, the manufacturer's bedding sequence calls for 6 to 10 stops from approximately 30 to 35 MPH applying moderate pressure, followed by a cool-down period. Searches for "rear SuperDuty brake pads for towing," "ferro-carbon heavy truck pads," and "HB705P.776 bedding procedure" typically lead to owners with exactly this setup.
The manufacturer's catalog recommends making 6 to 10 stops from roughly 30 to 35 MPH with moderate pressure, then 2 to 3 harder stops from about 40 to 45 MPH, without dragging the brakes. Allow at least 15 minutes for the system to cool before using the truck normally.
The manufacturer advises installing the pads securely per the instructions, washing and drying the rotors to remove debris, machining the rotors if needed to restore a smooth surface, and bedding the pads in properly.
Published fitment information varies in model years, rear-wheel configuration, and engine, so confirm your exact vehicle with the manufacturer before ordering.
This is a rear brake pad replacement, so it is a practical job for an experienced home mechanic with a floor jack, jack stands, a torque wrench, and a C-clamp for retracting the caliper piston. Expect the caliper to need to be supported without stressing the brake hose, and check the rotors for thickness, scoring, and runout before reusing them. Clean the rotor faces and make sure the caliper slides freely. Torque specs and the manufacturer's install sheet were not confirmed during research, so follow the manufacturer's instructions for torque values and hardware before you start.
