1998 GMC Astro Torque
Wheel Lug Nut Torque Specification
Lug Nut Torque
100
ft-lbs
The 1998 GMC Astro lug nut torque specification is 100 ft-lbs. This is the manufacturer-recommended torque value for all wheel lug nuts on the GMC Astro.
Always use a calibrated click-type torque wrench and tighten lug nuts in a star (criss-cross) pattern. After mounting new wheels, tires, or rotors, re-torque after 50–100 miles of driving to account for settling. Over-torquing causes warped brake rotors and stretched studs; under-torquing risks wheel separation.
For complete maintenance specifications including oil type, brake fluid, coolant, and more, see the full 1998 GMC Astro spec page.