Big truck

Data table



CAR  NAMESIZEETPCDCB
GMC Sierra 250024*10-188*180124.1
24*12-448*180124.1
24*14-768*180124.1
26*12-448*180124.1
26*14-768*180124.1
GMC sierra 150024x12-446*139.778.1
24x14-766*139.778.1
22*12-446*139.778.1
26X14-766*139.778.1
28X16-1016*139.778.1
GMC sierra 350024*14-768*180124.9


GMC Sierra 1500 / 2500 / 3500 Complete Tuning Guide

Basic Wheel Specs

GMC Sierra 1500 (Half-Ton)

  • Bolt Pattern: 6×139.7mm

  • Center Bore: 78.1mm

  • Lug Stud: M14×1.5

  • Factory Offset: ET24 ~ ET31

GMC Sierra 2500 / 3500 HD

  • Bolt Pattern: 8×180mm

  • Center Bore: 124.1mm

  • Lug Stud: M14×1.5

  • Factory Offset: ET35 ~ ET45

1. Engine Performance Tuning

Sierra 1500

Engines: 2.7L Turbo / 5.3L V8 / 6.2L V8 / 3.0L Duramax
  • ECU tune improves throttle response, horsepower, torque and shift smoothness

  • Cold air intake + 3-inch cat-back exhaust for better sound and power

  • 6.2L V8 support supercharger upgrade over 600HP

  • 3.0L Duramax diesel tune for stronger towing torque

Sierra 2500 / 3500 HD

Engine: 6.6L Duramax Diesel / 6.6L Gas V8
  • Stage 1–3 diesel tune gain big HP and torque for towing & off-road

  • 4–5 inch turbo back exhaust for deep diesel tone

  • Upgrade intercooler, fuel injectors and fuel pump for high performance builds

2. Suspension & Lift Tuning

Sierra 1500

  • 2″ Leveling Kit: Perfect daily look, fits 33-inch tires

  • 2.5–4″ Suspension Lift: Fit 35-inch tires, off-road ready

  • 6″+ Extreme Lift: For 24×12 big wheel show truck

Sierra 2500 / 3500 HD

  • 2.5–3.5″ Leveling Kit: Towing friendly, fits 35″ tires

  • 4–6″ Full Lift: Heavy duty shocks, fits 37″ tires

  • 8–10″ Extreme Lift: For 22×12 / 24×14 / 26×14 / 26×16 show builds

  • Upgrades: Adjustable upper control arms, dual steering stabilizer, heavy-duty leaf springs

3. Wheels & Rims Tuning Fitment

Sierra 1500

  • 18×9 / 20×10: ET+10 ~ +25 | Stock / 2″ Level

  • 22×10: ET0 ~ -12 | 2.5–4″ Lift

  • 24×12: ET-44 | 4–6″ Lift

  • Tire match: 33″ / 35″ A/T & M/T

Sierra 2500 / 3500 HD

  • 20×10: ET-18 ~ -24 | 4″ Lift

  • 22×12: ET-44 ~ -51 | 6″ Lift

  • 24×14: ET-70 ~ -76 | 6–8″ Lift

  • 26×14 / 26×16: ET-76 ~ -95 | 8–10″ Lift + Widebody

  • Rule: 24×14 and above forged wheels only

4. Exterior Styling

  • Custom GMC front mesh grille

  • Functional heat extraction hood

  • Wide fender flares for lifted big wheels

  • Steel front & rear bumpers + side steps

  • LED light bar, smoked headlights

  • Blackout package and custom badging

5. Classic Build Styles

  • Daily Luxury: Level kit + 20/22″ wheels + A/T tires + intake exhaust tune

  • Off-Road Aggressive: 3–6″ lift + negative offset rims + M/T tires

  • Heavy Duty Tow: 2500/3500 level + diesel tune + 20×10 wheels

  • Show Truck: 6–10″ extreme lift + 24×14 / 26×16 deep dish forged rims

6. Installation Key Rules

  • Hub ring: 1500 = 78.1mm | 2500/3500 = 124.1mm

  • Lug nut: M14×1.5 extended conical seat

  • Torque: 1500 → 140–150 N·m | 2500/3500 → 170–180 N·m

  • Big negative offset must match lift + flares to avoid rubbing

  • Lifted trucks need professional 4-wheel alignment




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