Chevrolet Suburban
1992–99 K1500/K2500
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
K1500 5.7 V8, 3.42s, from P245/75R16| Tire | Height | Under the diffs | Speedo at 65 | RPM at 65 | Gears for daily | Open |
|---|---|---|---|---|---|---|
| 265/75R16 | 31.6 in | +0.6 in | 63 mph | 1,653 | Keep 3.42s | Open → |
| 285/75R16 | 32.8 in | +1.2 in | 60 mph | 1,593 | 3.73 | Open → |
| 33x10.50R16 | 33.0 in | +1.3 in | 60 mph | 1,585 | 3.73 | Open → |
| 255/85R16 | 33.1 in | +1.3 in | 60 mph | 1,582 | 3.73 | Open → |
| 315/75R16 | 34.6 in | +2.1 in | 57 mph | 1,512 | 4.1 | Open → |
| 35x12.50R16 | 35.0 in | +2.3 in | 57 mph | 1,494 | 4.1 | Open → |
Stock turns 1,717 rpm at 65 in top gear. Flotation sizes are nominal; most measure a little short mounted.
Trims
3 we have figures forSize
- Wheelbase
- 131.5 in
- Front overhang
- 35 in
- Rear overhang
- 52.8 in
- Height
- 76 in
- Body
- SUV
- Stock tires
- LT245/75R16, P245/75R16
Transmissions and low range
- 4-speed automatic (4L60-E)
- 3.06 · 1.63 · 1 · 0.7
- 4-speed automatic (4L80-E)
- 2.48 · 1.48 · 1 · 0.75
- Low range, np241
- 2.72:1
- Low range, nv246
- 2.72:1
- Low range, np241hd
- 2.72:1
Axles
- Front
- K1500: GM 8.25 in IFS; K2500: GM 9.25 in IFS
- Rear
- K1500: GM 10-bolt 8.5 in or 9.5 in 14-bolt semi-float; K2500: GM 14-bolt 10.5 in full-float
- 3.42 ratio
- K1500 5.7 V8, K1500 LT245/75R16C on/off-road option
- 3.73 ratio
- K1500 5.7 V8, K1500 LT245/75R16C on/off-road option, K2500 5.7 or 7.4 V8
- 4.1 ratio
- K2500 5.7 or 7.4 V8
- Ratios made for it
- 3.73 · 4.1 · 4.56 · 4.88
Brakes
- Front rotor
- 11.61 in, 295 mm
- Front caliper piston
- 75.0 mm
- Rear drum
- 11.16 in, 283 mm
- Rear
- drum (11.15 x 2.75 in)
Suspension
- Front
- 4x4: double wishbone IFS, torsion bars
- Rear
- leaf springs, solid axle
- Rear layout
- Leaf springs
Fuel economy
- EPA highway
- 15 mpg
- Rated years
- 1992–1997, 4WD
Frame
- Rail top at the rear axle
- 28.2 in off the ground
- Measured on
- P245/75R16
Brake upgrades
What bigger tires need →- 8-lug 8600 GVW front caliper swap (Raybestos FRC4413C / FRC4414C)+14% brake torque11.6 → 11.6 in rotor · 1-pistonReman calipers only; owners pair it with a matching master cylinder and stainless lines.
Aftermarket bumpers
5 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 4
- Hammerhead 600-56-0185T Chevy Tahoe and Suburban 1998-2000 Front Bumper Winch Ready No Brushguard$2,056 · winch ready
- Iron Bull Bumpers 1992-2000 Chevrolet Tahoe/Suburban Front Bumper$1,700
- Ranch Hand Legend Series Front Bumper FBC881BLR220 lb · $2,023
- TrailReady 10200B Chevy Silverado 1500 1988-1999 Extreme Duty Front Bumper Winch Ready Base$3,654 · winch ready
Rear 1
- Iron Bull Bumpers 1992-1998 Chevrolet Suburban Rear Bumper$1,550 · winch ready
Every calculator, set up for the Suburban
Source: auto-brochures.com. Confirm axle by glovebox RPO (GU4/GU5/GU6/GT4/GT5) before ordering; K2500 front 9.25 IFS ring gears are limited.
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.