2018 GMC Sierra 1500 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 2018 GMC Sierra 1500. 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 2018 GMC Sierra 1500

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 2018 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 2018 GMC Sierra 1500?

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

What socket size do I need for the 2018 GMC Sierra 1500 lug nuts?

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

Are the 2018 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.

→ 2018 GMC Sierra 1500 oil drain plug torque & size

→ 2018 GMC Sierra 1500 suspension & steering torque specs (control arm, ball joint, tie rod)

All 55 2018 GMC Sierra 1500 fastener specs

Per-field evidence and legacy records for the 2018 GMC Sierra 1500. 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 55 records carry legacy review labels; those labels do not verify individual fields.

Engine — 2018 GMC Sierra 1500

Engine bolt-by-bolt torque for the 2018 GMC Sierra 1500, including the long block, valve covers, and intake. Valve Cover Bolt (Valve Cover). Torque: 89 in-lbs (legacy record, unverified). Socket size: 10mm (legacy record, unverified). Thread: M6x1.0 (legacy record, unverified). Part number: not verified. Thermostat Housing Bolt (Thermostat Housing). Torque: 18 ft-lbs (legacy record, unverified). Socket size: 10mm (legacy record, unverified). Thread: M8x1.25 (legacy record, unverified). Part number: not verified. Oil Filter (Engine Block). Torque: Hand tight + 3/4 turn (legacy record, unverified). Socket size: 3/4" Socket (legacy record, unverified). Thread: N/A (legacy record, unverified). Part number: PF63 (ACDelco) (legacy record, unverified). Oil Pan Bolt (Oil Pan). Torque: 18 ft-lbs (legacy record, unverified). Socket size: 10mm (legacy record, unverified). Thread: M8x1.25 (legacy record, unverified). Part number: not verified. Intake Manifold Bolt (Intake Manifold). Torque: 18 ft-lbs (legacy record, unverified). Socket size: 13mm (legacy record, unverified). Thread: M10x1.5 (legacy record, unverified). Part number: not verified. Serpentine Belt Tensioner Bolt (Belt Tensioner). Torque: 37 ft-lbs (legacy record, unverified). Socket size: 15mm (legacy record, unverified). Thread: M10x1.5 (legacy record, unverified). Part number: not verified. Oil Drain Plug (Oil Pan). 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). Power Steering Pump Bolt (PS Pump Bracket). Torque: 37 ft-lbs (legacy record, unverified). Socket size: 13mm (legacy record, unverified). Thread: M10x1.5 (legacy record, unverified). Part number: not verified. Alternator Bolt (Alternator Bracket). Torque: 37 ft-lbs (legacy record, unverified). Socket size: 15mm (legacy record, unverified). Thread: M10x1.5 (legacy record, unverified). Part number: not verified. Timing Cover Bolt (Timing Cover). Torque: 18 ft-lbs (legacy record, unverified). Socket size: 10mm (legacy record, unverified). Thread: M8x1.25 (legacy record, unverified). Part number: not verified. Fuel Rail Bolt (Fuel Rail). Torque: 89 in-lbs (legacy record, unverified). Socket size: 10mm (legacy record, unverified). Thread: M8x1.25 (legacy record, unverified). Part number: not verified. Engine Mount Bolt (Engine Mount). Torque: 70 ft-lbs (legacy record, unverified). Socket size: 18mm (legacy record, unverified). Thread: M12x1.75 (legacy record, unverified). Part number: not verified. Spark Plug (Cylinder Head). Torque: 11 ft-lbs (15 Nm) (legacy record, unverified). Socket size: 5/8 in. (16mm) (legacy record, unverified). Thread: M14x1.25 (legacy record, unverified). Part number: not verified. Idler Pulley Bolt (Idler Pulley). Torque: 37 ft-lbs (legacy record, unverified). Socket size: 15mm (legacy record, unverified). Thread: M10x1.5 (legacy record, unverified). Part number: not verified. Throttle Body Bolt (Throttle Body). Torque: 89 in-lbs (legacy record, unverified). Socket size: 10mm (legacy record, unverified). Thread: M8x1.25 (legacy record, unverified). Part number: not verified. Air Intake Boot Clamp (Air Intake). Torque: Hand tight (legacy record, unverified). Socket size: 8mm (legacy record, unverified). Thread: N/A (legacy record, unverified). Part number: not verified. Water Pump Bolt (Water Pump). Torque: 33 ft-lbs (legacy record, unverified). Socket size: 13mm (legacy record, unverified). Thread: M10x1.5 (legacy record, unverified). Part number: not verified. Exhaust Manifold Stud (Exhaust Manifold). Torque: 25 ft-lbs (legacy record, unverified). Socket size: 13mm (legacy record, unverified). Thread: M8x1.25 (legacy record, unverified). Part number: not verified.

Suspension — 2018 GMC Sierra 1500

Suspension and chassis fastener torque for the 2018 GMC Sierra 1500 — strut, control arm, and sway bar values. Sway Bar Bracket Bolt (Frame). Torque: 35 ft-lbs (legacy record, unverified). Socket size: 15mm (legacy record, unverified). Thread: M10x1.5 (legacy record, unverified). Part number: not verified. Steering Gearbox Bolt (Frame Rail). Torque: 110 ft-lbs (legacy record, unverified). Socket size: 18mm (legacy record, unverified). Thread: M12x1.75 (legacy record, unverified). Part number: not verified. Sway Bar End Link Nut (Sway Bar Link). Torque: 35 ft-lbs (legacy record, unverified). Socket size: 15mm (legacy record, unverified). Thread: M10x1.5 (legacy record, unverified). Part number: not verified. Upper Control Arm Bolt (Upper Control Arm). Torque: 140 ft-lbs (legacy record, unverified). Socket size: 21mm (legacy record, unverified). Thread: M14x2.0 (legacy record, unverified). Part number: not verified. Strut Tower Nut (Strut Tower). Torque: 44 ft-lbs (legacy record, unverified). Socket size: 18mm (legacy record, unverified). Thread: M12x1.75 (legacy record, unverified). Part number: not verified. Tie Rod End Nut (Tie Rod). Torque: 40 ft-lbs (legacy record, unverified). Socket size: 19mm (legacy record, unverified). Thread: M12x1.75 (legacy record, unverified). Part number: not verified. Pitman Arm Nut (Steering Box). Torque: 185 ft-lbs (legacy record, unverified). Socket size: 27mm (legacy record, unverified). Thread: M16x1.5 (legacy record, unverified). Part number: not verified. Shock Absorber Lower Bolt (Lower Mount). Torque: 70 ft-lbs (legacy record, unverified). Socket size: 18mm (legacy record, unverified). Thread: M12x1.75 (legacy record, unverified). Part number: not verified. Shock Absorber Upper Bolt (Shock Tower). Torque: 70 ft-lbs (legacy record, unverified). Socket size: 18mm (legacy record, unverified). Thread: M12x1.75 (legacy record, unverified). Part number: not verified. Lower Control Arm Bolt (Lower Control Arm). Torque: 140 ft-lbs (legacy record, unverified). Socket size: 21mm (legacy record, unverified). Thread: M14x2.0 (legacy record, unverified). Part number: not verified. Leaf Spring U-Bolt (Rear Axle). Torque: 120 ft-lbs (legacy record, unverified). Socket size: 19mm (legacy record, unverified). Thread: M12x1.75 (legacy record, unverified). Part number: not verified. Ball Joint Castle Nut (Ball Joint). Torque: 50 ft-lbs (legacy record, unverified). Socket size: 22mm (legacy record, unverified). Thread: M14x1.5 (legacy record, unverified). Part number: not verified.

Brake — 2018 GMC Sierra 1500

Brake fasteners on the 2018 GMC Sierra 1500. Brake Booster Nut (Firewall). Torque: 20 ft-lbs (legacy record, unverified). Socket size: 15mm (legacy record, unverified). Thread: M10x1.5 (legacy record, unverified). Part number: not verified. ABS Sensor Bolt (Wheel Hub). Torque: 13 ft-lbs (legacy record, unverified). Socket size: 10mm (legacy record, unverified). Thread: M8x1.25 (legacy record, unverified). Part number: not verified. Brake Line Fitting (Brake Lines). Torque: 12 ft-lbs (legacy record, unverified). Socket size: 11mm (legacy record, unverified). Thread: M10x1.0 (legacy record, unverified). Part number: not verified. Caliper Guide Pin (Caliper Bracket). Torque: 25 ft-lbs (legacy record, unverified). Socket size: 13mm (legacy record, unverified). Thread: M10x1.5 (legacy record, unverified). Part number: not verified. Master Cylinder Nut (Brake Booster). Torque: 18 ft-lbs (legacy record, unverified). Socket size: 13mm (legacy record, unverified). Thread: M8x1.25 (legacy record, unverified). Part number: not verified. Brake Pad Retaining Clip (Caliper Bracket). Torque: N/A (legacy record, unverified). Socket size: N/A (legacy record, unverified). Thread: N/A (legacy record, unverified). Part number: not verified. Brake Hose Banjo Bolt (Brake Caliper). Torque: 30 ft-lbs (legacy record, unverified). Socket size: 14mm (legacy record, unverified). Thread: M10x1.0 (legacy record, unverified). Part number: not verified. Brake Rotor Set Screw (Brake Rotor). Torque: 35 in-lbs (legacy record, unverified). Socket size: T30 Torx (legacy record, unverified). Thread: M6x1.0 (legacy record, unverified). Part number: not verified. Caliper Mounting Bolt (Brake Caliper). Torque: 80 ft-lbs (legacy record, unverified). Socket size: 18mm (legacy record, unverified). Thread: M12x1.75 (legacy record, unverified). Part number: not verified. Parking Brake Cable Bolt (Rear Caliper). Torque: 25 ft-lbs (legacy record, unverified). Socket size: 13mm (legacy record, unverified). Thread: M8x1.25 (legacy record, unverified). Part number: not verified.

Transmission — 2018 GMC Sierra 1500

Transmission fasteners on the 2018 GMC Sierra 1500. Transmission Crossmember Bolt (Frame). Torque: 70 ft-lbs (legacy record, unverified). Socket size: 18mm (legacy record, unverified). Thread: M12x1.75 (legacy record, unverified). Part number: not verified. Driveshaft U-Joint Strap Bolt (Driveshaft). Torque: 15 ft-lbs (legacy record, unverified). Socket size: 13mm (legacy record, unverified). Thread: M8x1.25 (legacy record, unverified). Part number: not verified. Bell Housing Bolt (Bell Housing). Torque: 37 ft-lbs (legacy record, unverified). Socket size: 18mm (legacy record, unverified). Thread: M12x1.75 (legacy record, unverified). Part number: not verified. Transmission Cooler Line Fitting (Transmission). Torque: 20 ft-lbs (legacy record, unverified). Socket size: 17mm (legacy record, unverified). Thread: N/A (legacy record, unverified). Part number: not verified. Torque Converter Bolt (Flex Plate). Torque: 46 ft-lbs (legacy record, unverified). Socket size: 15mm (legacy record, unverified). Thread: M10x1.5 (legacy record, unverified). Part number: not verified. Transmission Pan Bolt (Trans Pan). Torque: 12 ft-lbs (legacy record, unverified). Socket size: 13mm (legacy record, unverified). Thread: M8x1.25 (legacy record, unverified). Part number: not verified. Transfer Case Bolt (Transfer Case). Torque: 37 ft-lbs (legacy record, unverified). Socket size: 15mm (legacy record, unverified). Thread: M10x1.5 (legacy record, unverified). Part number: not verified. Transmission Mount Bolt (Trans Mount). Torque: 70 ft-lbs (legacy record, unverified). Socket size: 18mm (legacy record, unverified). Thread: M12x1.75 (legacy record, unverified). Part number: not verified. Transfer Case Drain Plug (Transfer Case). Torque: 15 ft-lbs (legacy record, unverified). Socket size: 15mm (legacy record, unverified). Thread: M14x1.5 (legacy record, unverified). Part number: not verified.

Wheel — 2018 GMC Sierra 1500

Wheel fasteners on the 2018 GMC Sierra 1500. Wheel Stud (Wheel Hub). Torque: N/A (legacy record, unverified). Socket size: N/A (legacy record, unverified). Thread: M14x1.5 (legacy record, unverified). Part number: not verified. TPMS Valve Stem Nut (Wheel Rim). Torque: 35 in-lbs (legacy record, unverified). Socket size: 8mm (legacy record, unverified). Thread: N/A (legacy record, unverified). Part number: not verified. Center Cap Retainer (Wheel Center). Torque: N/A (legacy record, unverified). Socket size: N/A (legacy record, unverified). Thread: N/A (legacy record, unverified). Part number: not verified. Hub Cap Screw (Wheel Hub). Torque: 15 ft-lbs (legacy record, unverified). Socket size: 10mm (legacy record, unverified). Thread: M6x1.0 (legacy record, unverified). Part number: not verified. Lug Nut (Wheel Assembly). Torque: 140 ft-lbs (190 Nm) (legacy record, unverified). Socket size: 22mm (legacy record, unverified). Thread: M14x1.5 (legacy record, unverified). Part number: 84567395 (legacy record, unverified). Wheel Weight Clip (Wheel Rim). Torque: N/A (legacy record, unverified). Socket size: N/A (legacy record, unverified). Thread: N/A (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 2018 GMC Sierra 1500 numbers above.

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