2015 Buick Verano Bolt Sizes & Torque Specs

Lug nut torque is not verified for this summary. Review the cited evidence and exact hardware application before installation.

This page distinguishes source-backed fields, unresolved conflicts and unverified legacy records for the 2015 Buick Verano. Match the exact hardware and manual conditions before maintenance. A source for one field does not verify the other specifications.

GM passenger cars, crossovers and trucks use different wheel hardware families, including seat-style differences that matter when buying aftermarket lugs. Match the listed row and the original seat type; do not infer a truck value from a car, or the reverse.

Common fastener categories on the 2015 Buick Verano

Wheel / lug nut torque and thread spec (covered above)
Brake caliper bracket, mounting, and slide/guide-pin bolts are different fasteners. Confirm the exact axle, application and service-manual specification before reassembly.
Engine oil drain plug torque and tool size when this vehicle has a verified drain-plug record
Transmission pan, valve cover, and intake manifold bolts where the database has exact records
Suspension control arm, sway bar, tie rod end and ball joint torque
Spark plug torque only when a vehicle-specific spark-plug row is available
Differential cover bolts (RWD/4WD only) and transfer case fasteners

Repair guidance for this model year

For 2015 model-year work: This era introduced widespread torque-to-yield (TTY) bolts on head, main, and crank pulley fasteners. TTY bolts stretch permanently when torqued and must not be reused — the spec calls for a fresh bolt every time. Always verify TTY status against the FSM before 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
Replacement washers, threadlocker, anti-seize, or dry-thread preparation only when the exact service procedure specifies them

Frequently asked questions

What is the lug nut torque on a 2015 Buick Verano?

Specification not verified for this lug nut summary. Do not substitute another model year's value.

What socket size do I need for the 2015 Buick Verano lug nuts?

Confirm the socket against the actual lug nut; no size is assumed here.

Are the 2015 Buick Verano 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 Verano years

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

→ 2015 Buick Verano oil drain plug torque & size

→ 2015 Buick Verano suspension & steering torque specs (control arm, ball joint, tie rod)

All 12 2015 Buick Verano fastener specs

Per-field evidence and legacy records for the 2015 Buick Verano. A verified torque does not verify socket size, thread or part number. Unverified records are not installation instructions; conflicting specifications are withheld. 2 of the 12 records carry legacy review labels; those labels do not verify individual fields.

Brakes — 2015 Buick Verano

Brake fasteners on the 2015 Buick Verano — caliper bracket, slide pins, and banjo bolt torque follow. Rear Caliper Bracket Bolt (Rear). Torque: 44 ft-lbs (60 Nm) (legacy record, unverified). Socket size: 15mm (legacy record, unverified). Thread: M10x1.5 (legacy record, unverified). Part number: not verified. Front Caliper Bracket Bolt (Front). Torque: 137 ft-lbs (186 Nm) (legacy record, unverified). Socket size: 18mm (legacy record, unverified). Thread: M12x1.5 (legacy record, unverified). Part number: not verified. Front Caliper Slide Pin (Front). Torque: 26 ft-lbs (35 Nm) (legacy record, unverified). Socket size: 13mm (legacy record, unverified). Thread: M8x1.25 (legacy record, unverified). Part number: not verified. Rear Caliper Slide Pin (Rear). Torque: 26 ft-lbs (35 Nm) (legacy record, unverified). Socket size: 13mm (legacy record, unverified). Thread: M8x1.25 (legacy record, unverified). Part number: not verified.

Engine — 2015 Buick Verano

Engine bolt-by-bolt torque for the 2015 Buick Verano, including the long block, valve covers, and intake. Spark Plug. Torque: 15 ft-lbs (20 Nm) (legacy record, unverified). Socket size: 5/8 in. (legacy record, unverified). Thread: M14x1.25 (legacy record, unverified). Part number: not verified. Oil Filter. Torque: 18 ft-lbs (25 Nm) (legacy record, unverified). Socket size: 32mm cap (legacy record, unverified). Thread: not verified. Part number: PF457G (ACDelco) (legacy record, unverified). Oil Drain Plug. Torque: 18 ft-lbs (25 Nm) (legacy record, unverified). Socket size: 15mm (legacy record, unverified). Thread: M12x1.75 (legacy record, unverified). Part number: 55577568 (legacy record, unverified).

Suspension — 2015 Buick Verano

Suspension and chassis fastener torque for the 2015 Buick Verano — strut, control arm, and sway bar values. Front Lower Control Arm Bolt (Front). Torque: 74 ft-lbs (100 Nm) (legacy record, unverified). Socket size: 18mm (legacy record, unverified). Thread: M12x1.5 (legacy record, unverified). Part number: not verified. Front Strut Top Nut (Front). Torque: 37 ft-lbs (50 Nm) (legacy record, unverified). Socket size: 15mm (legacy record, unverified). Thread: M12x1.5 (legacy record, unverified). Part number: not verified. Rear Lower Control Arm Bolt (Rear). Torque: 59 ft-lbs (80 Nm) (legacy record, unverified). Socket size: 15mm (legacy record, unverified). Thread: M10x1.5 (legacy record, unverified). Part number: not verified.

Wheels & Tires — 2015 Buick Verano

Wheels & Tires fasteners on the 2015 Buick Verano. Lug Nut. Torque: 100 ft-lbs (135 Nm) (legacy record, unverified). Socket size: 17mm (legacy record, unverified). Thread: M12x1.5 (legacy record, unverified). Part number: 84639994 (legacy record, unverified).

Transmission — 2015 Buick Verano

Transmission fasteners on the 2015 Buick Verano. Transmission Drain Plug. Torque: 12 Nm (106 lb-in) (legacy record, unverified). Socket size: not verified. Thread: 1/8"-27 NPTF (legacy record, unverified). Part number: not verified.

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 2015 Buick Verano numbers above.

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