2007 Buick Lucerne Lug Nut Torque & Bolt Specs

The 2007 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 2007 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 2007 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 2007 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 2007 Buick Lucerne?

The OEM-specified lug-nut torque for the 2007 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 2007 Buick Lucerne lug nuts?

The 2007 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 2007 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.

→ 2007 Buick Lucerne suspension & steering torque specs (control arm, ball joint, tie rod)

All 47 2007 Buick Lucerne fastener specs

Per-bolt torque, wrench size, and thread spec for the 2007 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 — 2007 Buick Lucerne

Wheel and lug nut spec for the 2007 Buick Lucerne. plan for a 19mm tool on a M12x1.5 stud; final torque is 100 ft-lbs (136 Nm) (lug nut).

Brakes — 2007 Buick Lucerne

Brake fasteners on the 2007 Buick Lucerne — caliper bracket, slide pins, and banjo bolt torque follow. Front brake caliper guide-pin bolt tightens to 27 ft-lbs (36 Nm), runs on M10x1.5 threads. The front brake caliper bracket bolt is a M14x2.0 thread, torqued to 133 ft-lbs (180 Nm).

Engine — 2007 Buick Lucerne

Engine bolt-by-bolt torque for the 2007 Buick Lucerne, including the long block, valve covers, and intake. The cylinder head bolt (3.8l 3800 v6) uses a 9/16" drive on a 7/16"-14 UNC thread, torqued to Step 1: 37 ft-lbs (50 Nm) | Step 2: +120 degrees at the cylinder head to block - 8 bolts per head, 16 per engine; 4 long + 4 short. At the harmonic balancer to crankshaft, the crankshaft balancer bolt (3.8l 3800 v6) torques to Step 1: 111 ft-lbs (150 Nm) | Step 2: +76 degrees. For the valve/rocker cover, plan for the right driver; final torque is 89 in-lbs (10 Nm) (valve rocker arm cover bolt (3.8l 3800 v6)). Spark plug (3.8l 3800 v6) tightens to 11 ft-lbs (15 Nm), located at the cylinder head - spark plug. The oil filter (3.8l 3800 v6), torqued to 22 ft-lbs (30 Nm) at the oil filter to adapter. The engine oil drain plug torques to 18 ft-lbs (25 Nm) (M14x1.5 thread). For the thermostat/water outlet housing, plan for the right driver; final torque is 20 ft-lbs (27 Nm) (water outlet housing bolt (3.8l 3800 v6)). Water pump pulley bolt (3.8l 3800 v6) tightens to 116 in-lbs (13 Nm), located at the water pump pulley. The knock sensor (3.8l 3800 v6), torqued to 13 ft-lbs (18 Nm) at the engine block - knock sensor. At the oil pan to block, the oil pan bolt (3.8l 3800 v6) torques to 125 in-lbs (14 Nm). For the flywheel to crankshaft, plan for the right driver; final torque is Step 1: 11 ft-lbs (15 Nm) | Step 2: +50 degrees (engine flywheel/flexplate bolt (3.8l 3800 v6)). Engine front cover bolt/stud (3.8l 3800 v6) tightens to Step 1: 15 ft-lbs (20 Nm) | Step 2: +40 degrees, located at the front/timing cover. The timing chain dampener bolt (3.8l 3800 v6), torqued to 16 ft-lbs (22 Nm) at the timing chain dampener. At the exhaust manifold stud into head, the exhaust manifold stud (3.8l 3800 v6) torques to 89 in-lbs (10 Nm). For the main bearing cap - vertical bolts, plan for the right driver; final torque is Step 1: 30 ft-lbs (40 Nm) | Step 2: +110 degrees (crankshaft main bearing cap bolt (3.8l 3800 v6)). Lower intake manifold bolt (3.8l 3800 v6) tightens to 11 ft-lbs (15 Nm), located at the lower intake manifold. The camshaft thrust plate bolt (3.8l 3800 v6), torqued to 11 ft-lbs (15 Nm) at the camshaft thrust plate. The spark plug torques to 15 ft-lbs (20 Nm) (5/8 in drive, M14x1.25 thread). For the throttle body to intake, plan for the right driver; final torque is 89 in-lbs (10 Nm) (throttle body bolt/nut (3.8l 3800 v6)). Crankshaft main bearing cap side bolt (3.8l 3800 v6) tightens to Step 1: 11 ft-lbs (15 Nm) | Step 2: +45 degrees, located at the main bearing cap - side bolts. The heated oxygen sensor (3.8l 3800 v6), torqued to 31 ft-lbs (42 Nm) at the o2 sensor in exhaust. At the camshaft sprocket, the camshaft sprocket bolt (3.8l 3800 v6) torques to Step 1: 74 ft-lbs (100 Nm) | Step 2: +90 degrees. For the exhaust pipe to manifold, plan for the right driver; final torque is 30 ft-lbs (40 Nm) (exhaust manifold pipe nut (3.8l 3800 v6)). Water pump bolt (3.8l 3800 v6) tightens to Large bolt: 25 ft-lbs (34 Nm) | Small bolt: 16 ft-lbs (22 Nm), located at the water pump to front cover. The oil pan drain plug (3.8l 3800 v6), torqued to 22 ft-lbs (30 Nm) at the oil pan drain. At the coolant temperature sensor, the engine coolant temperature sensor (3.8l 3800 v6) torques to 18 ft-lbs (25 Nm). For the balance shaft driven gear, plan for the right driver; final torque is Step 1: 16 ft-lbs (22 Nm) | Step 2: +70 degrees (balance shaft driven gear bolt (3.8l 3800 v6)). Balance shaft retainer bolt (3.8l 3800 v6) tightens to 22 ft-lbs (30 Nm), located at the balance shaft retainer. The exhaust manifold bolt/nut (3.8l 3800 v6), torqued to 22 ft-lbs (30 Nm) at the exhaust manifold to cylinder head. At the connecting rod bearing cap, the connecting rod bearing cap bolt (3.8l 3800 v6) torques to Step 1: 20 ft-lbs (27 Nm) | Step 2: +50 degrees. For the exhaust manifold heat shield, plan for the right driver; final torque is 15 ft-lbs (20 Nm) (exhaust manifold heat shield nut (3.8l 3800 v6)). Valve rocker arm bolt (3.8l 3800 v6) tightens to Step 1: 11 ft-lbs (15 Nm) | Step 2: +90 degrees, located at the rocker arm to cylinder head. The upper intake manifold bolt (3.8l 3800 v6), torqued to 89 in-lbs (10 Nm) at the upper intake manifold (plenum).

Drivetrain — 2007 Buick Lucerne

Drivetrain and driveline fasteners for the 2007 Buick Lucerne — axle, transmission, and differential plugs. The front hub/axle nut torques to 118 ft-lbs (160 Nm) (36mm drive, M24x1.5 thread). For the engine block to transaxle bellhousing, plan for the right driver; final torque is 55 ft-lbs (75 Nm) (engine to transaxle mounting bolt (3.8l 3800 v6)). Flywheel to torque converter bolt (3.8l 3800 v6) tightens to 46 ft-lbs (63 Nm), located at the flexplate to torque converter.

Suspension — 2007 Buick Lucerne

Suspension and chassis fastener torque for the 2007 Buick Lucerne — strut, control arm, and sway bar values. 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 strut upper mount nuts tightens to 37 ft-lbs (50 Nm). The lower control arm-to-frame bolt (front), torqued to 93 ft-lbs (126 Nm). The front wheel hub-to-knuckle bolts torques to 96 ft-lbs (130 Nm). plan for the right driver; final torque is 117 ft-lbs (158 Nm) (lower control arm-to-frame bolt (rear)). Front strut-to-knuckle bolt/nut tightens to 131 ft-lbs (178 Nm). The front sway bar link nut, torqued to 48 ft-lbs (65 Nm).

Steering — 2007 Buick Lucerne

Steering linkage fasteners on the 2007 Buick Lucerne. Outer tie rod end nut tightens to 35 ft-lbs (47 Nm), up to 52 ft-lbs to align pin, runs on M12x1.25 threads.

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 2007 Buick Lucerne numbers above.

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