TreadCompass

Buick Grand National Lug Nut Torque

The Buick Grand National lug nut torque is 100 ft-lbs (136 N·m) for 1984–1987 and 80 ft-lbs (108 N·m) for 1981–1983.

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Buick Grand National · 1981–1987

The spec changed over the years. Pick your year above, or find it here:
1984–1987100 ft-lbs · 136 N·m
1981–198380 ft-lbs · 108 N·m
  • ✓ Tighten in a star pattern, in two passes, with a torque wrench (not an impact gun)
  • ✓ Re-check the torque after the first 50–100 miles
  • ✓ Confirm against your owner’s manual; aftermarket wheels can differ

Source: TreadCompass vehicle fitment database. Page updated November 2026. Specs can vary with aftermarket wheels and lug hardware, so always confirm with your owner’s manual.

Factory tire sizes for the Buick Grand National

Compare prices across retailers for your size.

215/65R151981–1987 · Compare prices →205/70R141981–1983 · Compare prices →

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Buick Grand National lug nut torque FAQ

What is the lug nut torque for a Buick Grand National?

The Buick Grand National lug nut torque is 100 ft-lbs (136 N·m) for 1984–1987 and 80 ft-lbs (108 N·m) for 1981–1983. Tighten in a star pattern with a torque wrench, then re-check after the first 50–100 miles.

Do all Grand National trims use the same lug nut torque?

Yes. Every Grand National trim in our database uses the same lug nut torque for a given model year.

Has the Buick Grand National lug nut torque changed over the years?

Yes. It is 100 ft-lbs for 1984–1987 and 80 ft-lbs for 1981–1983. Pick your year above to see the exact spec.

What size tires come on the Buick Grand National?

Factory tire sizes include 215/65R15 (1981–1987) and 205/70R14 (1981–1983). Check the sidewall of your current tires to confirm yours, then compare prices for that size above.

New to torquing wheels? See how to torque lug nuts and common questions.