2009 Buick Lucerne Lug Nut Torque & Bolt Specs

The 2009 Buick Lucerne lug nut torque is 100 ft-lbs (136 Nm), tightened with a 19mm socket on M12x1.5 studs. Torque in a star pattern in two passes (snug, then final), and re-check after the first 50–100 miles of driving. Use a calibrated torque wrench — not an impact gun — for the final pass.

Lug nut torque: 100 ft-lbs (136 Nm) · Socket size: 19mm · Thread: M12x1.5.

This page is the OEM-referenced fastener summary for the 2009 Buick Lucerne. Use it before any maintenance or repair job where torque values matter — brake work, wheel changes, suspension service, engine teardowns, or oil changes. Specs are pulled from manufacturer service literature, cross-checked against community data, and updated as new chassis variants become available.

GM lug-nut torque clusters around 140 ft-lbs (190 Nm) for half-ton Silverado/Sierra and 100 ft-lbs for passenger cars like Malibu, Impala, and Cruze. GM heavy-duty trucks (2500HD/3500HD) jump to 165 ft-lbs. Most GM passenger cars use a 19mm socket; trucks moved from 22mm to 22mm-with-deep-well in 2014. Watch for GM's flat-flange lug nut design on the Silverado — the standard cone-seat aftermarket lugs will not seat correctly.

Common fastener categories on the 2009 Buick Lucerne

Wheel / lug nut torque and thread spec (covered above)
Brake caliper bracket bolts (typically 80-130 ft-lbs) and slide/guide pins (18-35 ft-lbs)
Engine oil drain plug torque — rarely above 30 ft-lbs; always use a new crush washer
Transmission pan, valve cover, and intake manifold bolts (low torque, often 89-106 in-lbs)
Suspension control arm, sway bar, tie rod end and ball joint torque
Spark plug torque (typically 10-15 ft-lbs on aluminum heads — do not exceed)
Differential cover bolts (RWD/4WD only) and transfer case fasteners

Repair guidance for this model year

For 2009 model-year work: Always use a calibrated torque wrench for safety-critical fasteners, and replace lock washers and crush washers on every reassembly.

Tools you will need

Metric socket set (8mm-22mm), 6-point impact-rated
Calibrated torque wrench (10-150 ft-lbs covers most automotive jobs; add a 0-250 ft-lbs wrench for truck lug nuts)
Breaker bar (24" minimum) for initial loosening
Penetrating oil (PB Blaster or Kroil) for any fastener over 5 years old
Anti-seize on stainless or dissimilar-metal threads; thread-locker (Loctite blue) on critical reassembly

Frequently asked questions

What is the lug nut torque on a 2009 Buick Lucerne?

The OEM-specified lug-nut torque for the 2009 Buick Lucerne is 100 ft-lbs (136 Nm), using a 19mm socket on M12x1.5 thread studs. Use a calibrated torque wrench in a star pattern, in two passes (50% and 100%), and re-check after 50-100 miles of driving.

What socket size do I need for the 2009 Buick Lucerne lug nuts?

The 2009 Buick Lucerne uses a 19mm socket. A 6-point impact-rated socket is recommended over a 12-point chrome socket — 12-points round off lug nuts under impact-driver use.

Are the 2009 Buick Lucerne fasteners metric or SAE?

Metric is the standard for this vehicle. Most fasteners on this vehicle are metric (M6, M8, M10, M12, M14). Bring a full metric set; SAE substitutes can round the head. Bolt-head markings are the fastest way to confirm grade and material at the bench.

Other Buick Lucerne years

Same model, different model year — fastener spec may change. Always confirm against the year for your VIN.

→ 2009 Buick Lucerne suspension & steering torque specs (control arm, ball joint, tie rod)

All 14 2009 Buick Lucerne fastener specs

Per-bolt torque, wrench size, and thread spec for the 2009 Buick Lucerne, sourced from OEM service literature and verified against community shop data. Values pair imperial (ft-lb) and metric (Nm) where the manufacturer publishes both.

Wheels — 2009 Buick Lucerne

Wheel and lug nut spec for the 2009 Buick Lucerne. The lug nut uses a 19mm drive on a M12x1.5 thread, torqued to 100 ft-lbs (136 Nm).

Brakes — 2009 Buick Lucerne

Brake fasteners on the 2009 Buick Lucerne — caliper bracket, slide pins, and banjo bolt torque follow. The front brake caliper guide-pin bolt torques to 27 ft-lbs (36 Nm) (M10x1.5 thread). plan for the right driver on a M14x2.0 stud; final torque is 133 ft-lbs (180 Nm) (front brake caliper bracket bolt).

Engine — 2009 Buick Lucerne

Engine bolt-by-bolt torque for the 2009 Buick Lucerne, including the long block, valve covers, and intake. plan for the right driver on a M14x1.5 stud; final torque is 18 ft-lbs (25 Nm) (engine oil drain plug). Spark plug tightens to 15 ft-lbs (20 Nm), takes a 5/8 in driver, runs on M14x1.25 threads.

Drivetrain — 2009 Buick Lucerne

Drivetrain and driveline fasteners for the 2009 Buick Lucerne — axle, transmission, and differential plugs. Front hub/axle nut tightens to 118 ft-lbs (160 Nm), takes a 36mm driver, runs on M24x1.5 threads.

Suspension — 2009 Buick Lucerne

Suspension and chassis fastener torque for the 2009 Buick Lucerne — strut, control arm, and sway bar values. The lower control arm-to-frame bolt (rear), torqued to 117 ft-lbs (158 Nm). The front strut upper mount nuts torques to 37 ft-lbs (50 Nm). plan for the right driver on a M14x1.5 stud; final torque is seat to 88 in-lbs then align, min 41 ft-lbs (55 Nm) (lower ball joint nut). Front wheel hub-to-knuckle bolts tightens to 96 ft-lbs (130 Nm). The lower control arm-to-frame bolt (front), torqued to 93 ft-lbs (126 Nm). The front strut-to-knuckle bolt/nut torques to 131 ft-lbs (178 Nm). plan for the right driver; final torque is 48 ft-lbs (65 Nm) (front sway bar link nut).

Steering — 2009 Buick Lucerne

Steering linkage fasteners on the 2009 Buick Lucerne. The outer tie rod end nut torques to 35 ft-lbs (47 Nm), up to 52 ft-lbs to align pin (M12x1.25 thread).

New to torquing wheels? Read our How lug nut torque works — the complete guide for star-pattern sequence, re-torque intervals, and how to read a lug spec — then use the 2009 Buick Lucerne numbers above.

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