2015 GMC Sierra 1500 Lug Nut Torque & Bolt Specs

The 2015 GMC Sierra 1500 lug nut torque is 140 ft-lbs (190 Nm), tightened with a 22mm socket on M14x1.5 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: 140 ft-lbs (190 Nm) · Socket size: 22mm · Thread: M14x1.5.

This page is the OEM-referenced fastener summary for the 2015 GMC Sierra 1500. 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 2015 GMC Sierra 1500

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 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
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 2015 GMC Sierra 1500?

The OEM-specified lug-nut torque for the 2015 GMC Sierra 1500 is 140 ft-lbs (190 Nm), using a 22mm socket on M14x1.5 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 2015 GMC Sierra 1500 lug nuts?

The 2015 GMC Sierra 1500 uses a 22mm 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 2015 GMC Sierra 1500 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 GMC Sierra 1500 years

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

→ 2015 GMC Sierra 1500 oil drain plug torque & size

→ 2015 GMC Sierra 1500 suspension & steering torque specs (control arm, ball joint, tie rod)

All 55 2015 GMC Sierra 1500 fastener specs

Per-bolt torque, wrench size, and thread spec for the 2015 GMC Sierra 1500, sourced from OEM service literature and verified against community shop data. Values pair imperial (ft-lb) and metric (Nm) where the manufacturer publishes both. 5 of the 55 fastener specs on this page are independently verified against OEM service manuals and manufacturer torque data (last reviewed June 2026).

Engine — 2015 GMC Sierra 1500

Engine bolt-by-bolt torque for the 2015 GMC Sierra 1500, including the long block, valve covers, and intake. Oil pan bolt tightens to 18 ft-lbs, takes a 10mm driver, runs on M8x1.25 threads, located at the oil pan. The serpentine belt tensioner bolt uses a 15mm drive on a M10x1.5 thread, torqued to 37 ft-lbs at the belt tensioner. At the idler pulley, the idler pulley bolt torques to 37 ft-lbs (15mm drive, M10x1.5 thread). For the fuel rail, plan for a 10mm tool on a M8x1.25 stud; final torque is 89 in-lbs (fuel rail bolt). Valve cover bolt tightens to 89 in-lbs, takes a 10mm driver, runs on M6x1.0 threads, located at the valve cover. The alternator bolt uses a 15mm drive on a M10x1.5 thread, torqued to 37 ft-lbs at the alternator bracket. At the cylinder head, the spark plug torques to 11 ft-lbs (15 Nm) (5/8 in. (16mm) drive, M14x1.25 thread). This figure is independently verified against OEM service data. For the air intake, plan for a 8mm tool on a N/A stud; final torque is Hand tight (air intake boot clamp). Water pump bolt tightens to 33 ft-lbs, takes a 13mm driver, runs on M10x1.5 threads, located at the water pump. The oil drain plug uses a 15mm drive on a M14x1.5 thread, torqued to 18 ft-lbs (24 Nm) at the oil pan. This figure is independently verified against OEM service data. At the throttle body, the throttle body bolt torques to 89 in-lbs (10mm drive, M8x1.25 thread). For the thermostat housing, plan for a 10mm tool on a M8x1.25 stud; final torque is 18 ft-lbs (thermostat housing bolt). Oil filter tightens to Hand tight + 3/4 turn, takes a 3/4" Socket driver, runs on N/A threads, located at the engine block. The power steering pump bolt uses a 13mm drive on a M10x1.5 thread, torqued to 37 ft-lbs at the ps pump bracket. At the timing cover, the timing cover bolt torques to 18 ft-lbs (10mm drive, M8x1.25 thread). For the intake manifold, plan for a 13mm tool on a M10x1.5 stud; final torque is 18 ft-lbs (intake manifold bolt). Exhaust manifold stud tightens to 25 ft-lbs, takes a 13mm driver, runs on M8x1.25 threads, located at the exhaust manifold. The engine mount bolt uses a 18mm drive on a M12x1.75 thread, torqued to 70 ft-lbs at the engine mount.

Suspension — 2015 GMC Sierra 1500

Suspension and chassis fastener torque for the 2015 GMC Sierra 1500 — strut, control arm, and sway bar values. The shock absorber lower bolt uses a 18mm drive on a M12x1.75 thread, torqued to 70 ft-lbs at the lower mount. At the strut tower, the strut tower nut torques to 44 ft-lbs (18mm drive, M12x1.75 thread). For the rear axle, plan for a 19mm tool on a M12x1.75 stud; final torque is 120 ft-lbs (leaf spring u-bolt). Steering gearbox bolt tightens to 110 ft-lbs, takes a 18mm driver, runs on M12x1.75 threads, located at the frame rail. The pitman arm nut uses a 27mm drive on a M16x1.5 thread, torqued to 185 ft-lbs at the steering box. At the frame, the sway bar bracket bolt torques to 35 ft-lbs (15mm drive, M10x1.5 thread). For the ball joint, plan for a 22mm tool on a M14x1.5 stud; final torque is 50 ft-lbs (ball joint castle nut). Sway bar end link nut tightens to 35 ft-lbs, takes a 15mm driver, runs on M10x1.5 threads, located at the sway bar link. The lower control arm bolt uses a 21mm drive on a M14x2.0 thread, torqued to 140 ft-lbs at the lower control arm. At the shock tower, the shock absorber upper bolt torques to 70 ft-lbs (18mm drive, M12x1.75 thread). For the tie rod, plan for a 19mm tool on a M12x1.75 stud; final torque is 40 ft-lbs (tie rod end nut). Upper control arm bolt tightens to 140 ft-lbs, takes a 21mm driver, runs on M14x2.0 threads, located at the upper control arm.

Transmission — 2015 GMC Sierra 1500

Transmission fasteners on the 2015 GMC Sierra 1500. At the trans mount, the transmission mount bolt torques to 70 ft-lbs (18mm drive, M12x1.75 thread). For the trans pan, plan for a 13mm tool on a M8x1.25 stud; final torque is 12 ft-lbs (transmission pan bolt). Transmission crossmember bolt tightens to 70 ft-lbs, takes a 18mm driver, runs on M12x1.75 threads, located at the frame. The transmission cooler line fitting uses a 17mm drive on a N/A thread, torqued to 20 ft-lbs at the transmission. At the driveshaft, the driveshaft u-joint strap bolt torques to 15 ft-lbs (13mm drive, M8x1.25 thread). For the transfer case, plan for a 15mm tool on a M10x1.5 stud; final torque is 37 ft-lbs (transfer case bolt). Transfer case drain plug tightens to 15 ft-lbs, takes a 15mm driver, runs on M14x1.5 threads, located at the transfer case. The torque converter bolt uses a 15mm drive on a M10x1.5 thread, torqued to 46 ft-lbs at the flex plate. At the bell housing, the bell housing bolt torques to 37 ft-lbs (18mm drive, M12x1.75 thread).

Brake — 2015 GMC Sierra 1500

Brake fasteners on the 2015 GMC Sierra 1500. For the firewall, plan for a 15mm tool on a M10x1.5 stud; final torque is 20 ft-lbs (brake booster nut). Brake hose banjo bolt tightens to 30 ft-lbs, takes a 14mm driver, runs on M10x1.0 threads, located at the brake caliper. The caliper guide pin uses a 13mm drive on a M10x1.5 thread, torqued to 74 ft-lbs (100 Nm) at the caliper bracket. Confirmed against manufacturer service literature. At the caliper bracket, the brake pad retaining clip torques to N/A (N/A drive, N/A thread). For the brake lines, plan for a 11mm tool on a M10x1.0 stud; final torque is 12 ft-lbs (brake line fitting). Brake rotor set screw tightens to 35 in-lbs, takes a T30 Torx driver, runs on M6x1.0 threads, located at the brake rotor. The master cylinder nut uses a 13mm drive on a M8x1.25 thread, torqued to 18 ft-lbs at the brake booster. At the brake caliper, the caliper mounting bolt torques to 170 ft-lbs (230 Nm) (18mm drive, M12x1.75 thread). OEM-verified spec. For the wheel hub, plan for a 10mm tool on a M8x1.25 stud; final torque is 13 ft-lbs (abs sensor bolt). Parking brake cable bolt tightens to 25 ft-lbs, takes a 13mm driver, runs on M8x1.25 threads, located at the rear caliper.

Wheel — 2015 GMC Sierra 1500

Wheel fasteners on the 2015 GMC Sierra 1500. Center cap retainer tightens to N/A, takes a N/A driver, runs on N/A threads, located at the wheel center. The hub cap screw uses a 10mm drive on a M6x1.0 thread, torqued to 15 ft-lbs at the wheel hub. At the wheel rim, the wheel weight clip torques to N/A (N/A drive, N/A thread). For the wheel rim, plan for a 8mm tool on a N/A stud; final torque is 35 in-lbs (tpms valve stem nut). Lug nut tightens to 140 ft-lbs (190 Nm), takes a 22mm driver, runs on M14x1.5 threads, located at the wheel assembly. Confirmed against manufacturer service literature. The wheel stud uses a N/A drive on a M14x1.5 thread, torqued to N/A at the wheel hub.

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 GMC Sierra 1500 numbers above.

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