2021 GMC Sierra 1500 Lug Nut Torque & Bolt Specs

The 2021 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 2021 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 2021 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 2021 late-model work: Modern vehicles increasingly use aluminum body and suspension components. Aluminum fastener torque is typically 60-70% of equivalent steel torque, and aluminum threads strip easily. Use a calibrated torque wrench and apply anti-seize on any steel fastener threading into aluminum.

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 2021 GMC Sierra 1500?

The OEM-specified lug-nut torque for the 2021 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 2021 GMC Sierra 1500 lug nuts?

The 2021 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 2021 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.

→ 2021 GMC Sierra 1500 oil drain plug torque & size

→ 2021 GMC Sierra 1500 suspension & steering torque specs (control arm, ball joint, tie rod)

All 55 2021 GMC Sierra 1500 fastener specs

Per-bolt torque, wrench size, and thread spec for the 2021 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. 4 of the 55 fastener specs on this page are independently verified against OEM service manuals and manufacturer torque data (last reviewed June 2026).

Engine — 2021 GMC Sierra 1500

Engine bolt-by-bolt torque for the 2021 GMC Sierra 1500, including the long block, valve covers, and intake. The fuel rail bolt uses a 10mm drive on a M8x1.25 thread, torqued to 89 in-lbs at the fuel rail. 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). Water pump bolt tightens to 33 ft-lbs, takes a 13mm driver, runs on M10x1.5 threads, located at the water pump. The spark plug uses a 5/8 in. (16mm) drive on a M14x1.25 thread, torqued to 11 ft-lbs (15 Nm) at the cylinder head. OEM-verified spec. At the belt tensioner, the serpentine belt tensioner bolt torques to 37 ft-lbs (15mm drive, M10x1.5 thread). For the valve cover, plan for a 10mm tool on a M6x1.0 stud; final torque is 89 in-lbs (valve cover bolt). Power steering pump bolt tightens to 37 ft-lbs, takes a 13mm driver, runs on M10x1.5 threads, located at the ps pump bracket. The idler pulley bolt uses a 15mm drive on a M10x1.5 thread, torqued to 37 ft-lbs at the idler pulley. At the engine mount, the engine mount bolt torques to 70 ft-lbs (18mm drive, M12x1.75 thread). For the air intake, plan for a 8mm tool on a N/A stud; final torque is Hand tight (air intake boot clamp). 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. Confirmed against manufacturer service literature. The alternator bolt uses a 15mm drive on a M10x1.5 thread, torqued to 37 ft-lbs at the alternator bracket. At the oil pan, the oil drain plug torques to 18 ft-lbs (25 Nm) (15mm drive, M12x1.75 thread). OEM-verified spec. For the exhaust manifold, plan for a 13mm tool on a M8x1.25 stud; final torque is 25 ft-lbs (exhaust manifold stud). Thermostat housing bolt tightens to 18 ft-lbs, takes a 10mm driver, runs on M8x1.25 threads, located at the thermostat housing. The oil pan bolt uses a 10mm drive on a M8x1.25 thread, torqued to 18 ft-lbs at the oil pan. At the throttle body, the throttle body bolt torques to 89 in-lbs (10mm drive, M8x1.25 thread).

Suspension — 2021 GMC Sierra 1500

Suspension and chassis fastener torque for the 2021 GMC Sierra 1500 — strut, control arm, and sway bar values. At the tie rod, the tie rod end nut torques to 40 ft-lbs (19mm drive, M12x1.75 thread). For the sway bar link, plan for a 15mm tool on a M10x1.5 stud; final torque is 35 ft-lbs (sway bar end link nut). Shock absorber lower bolt tightens to 70 ft-lbs, takes a 18mm driver, runs on M12x1.75 threads, located at the lower mount. 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 frame rail, the steering gearbox bolt torques to 110 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). Strut tower nut tightens to 44 ft-lbs, takes a 18mm driver, runs on M12x1.75 threads, located at the strut tower. The ball joint castle nut uses a 22mm drive on a M14x1.5 thread, torqued to 50 ft-lbs at the ball joint. At the shock tower, the shock absorber upper bolt torques to 70 ft-lbs (18mm drive, M12x1.75 thread). For the upper control arm, plan for a 21mm tool on a M14x2.0 stud; final torque is 140 ft-lbs (upper control arm bolt). Sway bar bracket bolt tightens to 35 ft-lbs, takes a 15mm driver, runs on M10x1.5 threads, located at the frame. The pitman arm nut uses a 27mm drive on a M16x1.5 thread, torqued to 185 ft-lbs at the steering box.

Wheel — 2021 GMC Sierra 1500

Wheel fasteners on the 2021 GMC Sierra 1500. For the wheel assembly, plan for a 22mm tool on a M14x1.5 stud; final torque is 140 ft-lbs (190 Nm) (lug nut). Hub cap screw tightens to 15 ft-lbs, takes a 10mm driver, runs on M6x1.0 threads, located at the wheel hub. The wheel weight clip uses a N/A drive on a N/A thread, torqued to N/A at the wheel rim. At the wheel rim, the tpms valve stem nut torques to 35 in-lbs (8mm drive, N/A thread). For the wheel hub, plan for a N/A tool on a M14x1.5 stud; final torque is N/A (wheel stud). Center cap retainer tightens to N/A, takes a N/A driver, runs on N/A threads, located at the wheel center.

Transmission — 2021 GMC Sierra 1500

Transmission fasteners on the 2021 GMC Sierra 1500. Driveshaft u-joint strap bolt tightens to 15 ft-lbs, takes a 13mm driver, runs on M8x1.25 threads, located at the driveshaft. The transmission cooler line fitting uses a 17mm drive on a N/A thread, torqued to 20 ft-lbs at the transmission. At the transfer case, the transfer case bolt torques to 37 ft-lbs (15mm drive, M10x1.5 thread). For the trans pan, plan for a 13mm tool on a M8x1.25 stud; final torque is 12 ft-lbs (transmission pan 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 trans mount, the transmission mount bolt torques to 70 ft-lbs (18mm drive, M12x1.75 thread). For the bell housing, plan for a 18mm tool on a M12x1.75 stud; final torque is 37 ft-lbs (bell housing bolt). Transmission crossmember bolt tightens to 70 ft-lbs, takes a 18mm driver, runs on M12x1.75 threads, located at the frame.

Brake — 2021 GMC Sierra 1500

Brake fasteners on the 2021 GMC Sierra 1500. The abs sensor bolt uses a 10mm drive on a M8x1.25 thread, torqued to 13 ft-lbs at the wheel hub. At the brake caliper, the brake hose banjo bolt torques to 30 ft-lbs (14mm drive, M10x1.0 thread). For the brake booster, plan for a 13mm tool on a M8x1.25 stud; final torque is 18 ft-lbs (master cylinder nut). Brake pad retaining clip tightens to N/A, takes a N/A driver, runs on N/A threads, located at the caliper bracket. The parking brake cable bolt uses a 13mm drive on a M8x1.25 thread, torqued to 25 ft-lbs at the rear caliper. At the firewall, the brake booster nut torques to 20 ft-lbs (15mm drive, M10x1.5 thread). For the brake rotor, plan for a T30 Torx tool on a M6x1.0 stud; final torque is 35 in-lbs (brake rotor set screw). Brake line fitting tightens to 12 ft-lbs, takes a 11mm driver, runs on M10x1.0 threads, located at the brake lines. The caliper guide pin uses a 13mm drive on a M10x1.5 thread, torqued to 25 ft-lbs at the caliper bracket. At the brake caliper, the caliper mounting bolt torques to 37 ft-lbs (50 Nm), then +30-45° (torque-to-yield — replace bolts) (18mm drive, M12x1.75 thread). OEM-verified spec.

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 2021 GMC Sierra 1500 numbers above.

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