Tough As Nails Brake Booster Handles Heavy Stopping Power For Chevy And GMC Full Size Trucks 1973 To 1980 Compatible With C10 C20 K10 K20 Suburban K5 Blazer Rigs

Heavy Duty Brake Booster For Chevrolet GMC 73 To 80 Trucks
✔️ OEM 5471008 replacement with 10.85 in diaphragm and M10 studs

This single replacement vacuum brake booster restores factory braking power for classic heavy duty pickups. Technicians use it to fix soft pedals and regain consistent stopping force during daily driving or hauling. The direct swap design drops right into older chassis without cutting or welding.

✅ Interchangeable with factory part numbers 5471008 and 18003678 series
✅ Engineered with reinforced steel shell and corrosion resistant sealant
✅ Measures 10.85 in / 275.59 mm across the main diaphragm surface
✅ Fits housings sized 10.559 in / 268.22 mm with clean bolt alignment
✅ Secures to master cylinders using standard M10x1.5 threaded studs

💡 What causes a soft brake pedal in older pickup trucks and vans?
A degraded diaphragm or leaking vacuum seal typically kills ped stiffness and slows response times for heavy loads. Swapping to a rebuilt unit keeps repairs handy under the hood while restoring factory clutch feel. Proper sizing matters most when matching flange profiles to vintage master cylinder mounting points. - Replace cracked rubber seals to stop vacuum leaks before they warp pedal travel
- Match stud threads and housing diameters to guarantee clean torque distribution
- Test booster function after install to verify steady fluid pressure buildup