Chevrolet Suburban
2015–20
Factory gearing, tires, angles and brakes for the Suburban, and what the usual upgrades do to it. Every number is from the maker's own figures unless the calculators say otherwise. A few figures here are still waiting on a factory document; the calculators mark them.
Tire upgrades, worked out
LT Z71 Off-Road Package, 3.42s, from 265/65R18| Tire | Height | Under the diffs | Speedo at 65 | RPM at 65 | Gears for daily | Open |
|---|---|---|---|---|---|---|
| 285/65R18 | 32.6 in | +0.5 in | 63 mph | 1,536 | Keep 3.42s | Open → |
| 33x12.50R18 | 33.0 in | +0.7 in | 62 mph | 1,517 | Keep 3.42s | Open → |
| 275/70R18 | 33.2 in | +0.8 in | 62 mph | 1,510 | 3.73 | Open → |
| 35x11.50R18 | 35.0 in | +1.7 in | 59 mph | 1,430 | 3.73 | Open → |
| 35x12.50R18 | 35.0 in | +1.7 in | 59 mph | 1,430 | 3.73 | Open → |
| 37x12.50R18 | 37.0 in | +2.7 in | 55 mph | 1,353 | 4.1 | Open → |
Stock turns 1,586 rpm at 65 in top gear. Flotation sizes are nominal; most measure a little short mounted.
Trims
2 we have figures for| Trim | Tire | Transmission | Axle | Angles | Clearance | Open |
|---|---|---|---|---|---|---|
| LT Z71 Off-Road Package | 265/65R18 | 6-speed automatic | 3.42 | 15.5 · ~17.8 · 21.1 | 7.9 in | Use → |
| Max Trailering Package (2-speed on 4WD) | 265/65R18 | 6-speed automatic | 3.42 | 15.5 · ~17.8 · 21.1 | 7.9 in | Use → |
~ Estimated from the wheelbase and ground clearance. No maker has published it for this truck yet.
Size
- Wheelbase
- 130 in
- Front overhang
- 40.6 in
- Rear overhang
- 53.9 in
- Height
- 76 in
- Body
- SUV
- Stock tires
- 265/65R18
Transmissions and low range
- 6-speed automatic (6L80)
- 4.03 · 2.36 · 1.53 · 1.15 · 0.85 · 0.67
- Low range, at2
- 2.72:1
Axles
- Front
- GM 9.25 in IFS
- Rear
- GM 9.76 in 12-bolt
- 3.42 ratio
- All trims
- Ratios made for it
- 3.73 · 4.1
Brakes
- Front rotor
- 12.99 in, 330 mm
- Front caliper piston
- 51.0 mm
- Rear rotor
- 13.58 in, 345 mm
- Rear
- disc (vented, 345 x 20 mm)
Suspension
- Front
- double wishbone IFS, coilover struts
- Rear
- 5-link (upper and lower control arms plus track bar), coil springs; air springs / auto-leveling optional
- Rear layout
- Factory 4-link
Fuel economy
- EPA highway
- 22 mpg
- Rated years
- 2015–2020, 4WD
Brake upgrades
What bigger tires need →- Brembo 6-piston front brake kit (accessory, 410 mm rotors)+29% brake torque13.0 → 16.1 in rotor · 6-pistonNot checked.
- Baer 6T front brake kit 4301682B-2 (GM 1500 trucks 1999-on, SUVs 2000-on)+5% brake torque13.0 → 13.5 in rotor · 6-piston · 17 in wheels or bigger · $1,900Baer list price (black calipers).
Aftermarket bumpers
6 listedMakers almost never publish angles, bottom heights or how far a bumper tucks, so these fill in as owners measure them. Measured yours? Add it on the rig page and every owner of this Suburban sees how it does on their tires and lift.
Front 5
- Chassis Unlimited 2015-2020 Chevy-gm TAHOE/SUBURBAN/YUKON Octane Front Winch Bumper$1,907 · winch ready
- Fab Fours CS15-D3551-1 Chevy Suburban 2015-2020 Vengeance Front Bumper No Guard$2,380
- Fab Fours CS15-F3551-1 Chevy Suburban 1500 2015-2020 Premium Front Bumper Sensor Winch Ready No Guard$3,500 · winch ready
- Iron Bull Bumpers 2015-2020 Chevrolet Tahoe/Suburban Front Bumper$1,700
- TrailReady 10655B Chevy Tahoe and Suburban 2015-2020 Front Bumper Winch Ready Base$3,654 · winch ready
Every calculator, set up for the Suburban
Source: device.report.
Use at your own risk. These calculators are here to help you plan and to inform your decisions, not to sign off on a build. Many numbers are estimates worked out from factory figures, and some factory figures are not yet confirmed. Check every number against your own truck, its manuals and a qualified shop before you buy parts, cut, weld, lift, regear or drive on it. Long Range Desert Tools is not liable for anything you do based on these calculators or their results. The full terms are in our policies.