Chevrolet Silverado 1500
GMT900, 2007–13

Factory gearing, tires, angles and brakes for the Silverado 1500, 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.

Use this truck in the calculators

143.5 in wheelbase · 39.4 in front · 41.3 in rear overhang

Stock tireP245/75R1630.5 in tall

Axle ratio3.08–4.1Factory, by trim

Crawl ratio44.9:1Best trim: Z71 Off-Road

Angles16 · ~18.4 · 23.3°Approach, breakover, departure (~ estimated)

Clearance9 inFactory figure

Highway mpg18EPA

Tire upgrades, worked out

WT 4x4, 3.23s, 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	1,552	Keep 3.23s	Open →
285/75R16	32.8 in	+1.2 in	60 mph	1,496	3.73	Open →
33x10.50R16	33.0 in	+1.3 in	60 mph	1,488	3.73	Open →
255/85R16	33.1 in	+1.3 in	60 mph	1,485	3.73	Open →
315/75R16	34.6 in	+2.1 in	57 mph	1,419	3.73	Open →
35x12.50R16	35.0 in	+2.3 in	57 mph	1,403	3.73	Open →

Stock turns 1,612 rpm at 65 in top gear. Flotation sizes are nominal; most measure a little short mounted.

Trims

3 we have figures for

Trim	Tire	Transmission	Axle	Angles	Clearance	Open
WT 4x4	P245/75R16	Hydra-matic 4L60-E 4-speed automatic, Hydra-matic 6L80 6-speed automatic	3.23 / 3.42 / 3.73	16 · ~18.4 · 23.3	9.0 in	Use →
LT 4x4	P265/70R17	Hydra-matic 4L60-E 4-speed automatic, Hydra-matic 6L80 6-speed automatic	3.08 / 3.42 / 3.73	15.5 · ~18.4 · 23.1	9.0 in	Use →
Z71 Off-Road	P265/70R17	Hydra-matic 4L60-E 4-speed automatic, Hydra-matic 6L80 6-speed automatic	3.42 / 3.73 / 4.1	15.5^* · ~18.4 · 23.1^*	9.0 in^*	Use →

* The maker doesn’t publish this figure for that trim, so it shows the closest trim’s (same tire where we have one), or a close relative’s that shares the same body or front end. Hover the star to see which.

~ Estimated from the wheelbase and ground clearance. No maker has published it for this truck yet.

Size

Wheelbase: 143.5 in
Front overhang: 39.4 in
Rear overhang: 41.3 in
Height: 76 in
Body: Pickup
Stock tires: P245/75R16, P265/70R17

Transmissions and low range

Hydra-matic 4L60-E 4-speed automatic: 3.059 · 1.625 · 1 · 0.696
Hydra-matic 6L80 6-speed automatic: 4.03 · 2.36 · 1.53 · 1.15 · 0.85 · 0.67
Low range, nv263: 2.72:1
Low range, np246: 2.72:1

Axles

Front: GM 8.25 in IFS
Rear: GM 8.6 in 10-bolt (9.76 in on some 6.2/Max Trailering)
3.08 ratio: LT 4x4
3.23 ratio: WT 4x4
3.42 ratio: WT 4x4, LT 4x4, Z71 Off-Road
3.73 ratio: WT 4x4, LT 4x4, Z71 Off-Road
4.1 ratio: Z71 Off-Road
Ratios made for it: 3.73 · 4.1 · 4.56

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 (torsion bars through 2006, coilovers after)
Rear: leaf springs, solid axle
Rear layout: Leaf springs

Fuel economy

EPA highway: 18 mpg
Rated years: 2007–2013, 4WD

Brake upgrades

What bigger tires need →

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

14 listed

Makers 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 Silverado 1500 sees how it does on their tires and lift.

Front 9

Body Armor 4x4 2007-2013 Chevrolet Silverado 1500 Eco Series Front Bumper$1,000
Buckstop C8CLS Front Bumper Chevy Silverado 1500 2007-2013 Winch Ready with Tow Hooks Classic 1$3,772 · winch ready
Chassis Unlimited 2008-2013 Chevy Silverado 1500 Octane Front Winch Bumper$1,795 · winch ready
DV8 Offroad 2007-2013 Chevy Silverado 1500 Steel Front Bumper$425 · winch ready
Fab Fours CS07-D2051-1 Chevy Silverado 1500 2007-2013 Vengeance Front Bumper No Guard$2,380 · winch ready
Fishbone Offroad Front Bumper 2007-2013 Chevy Silverado FB22368$1,000 · winch ready
Hammerhead 600-56-0134 Chevy Silverado 1500 2007-2013 Front Bumper Winch Ready No Brushguard$2,056 · winch ready
Iron Bull Bumpers 2007-2013 Chevrolet Silverado 1500 Front Bumper$1,700
Throttle Down Kustoms 2007.5-2013 Chevrolet Silverado 1500 PreRunner Bumper$1,775

Rear 5

Every calculator, set up for the Silverado 1500

Tire sizeBigger tires: speedo, clearance, angles and brakes.Compare tires RegearHighway RPM on every ratio and mpg.Pick your gears Crawl ratioHow slow it creeps, against other trucks.Work out crawl SpeedometerWhat it really reads on new tires.Fix your speedo LinksAnti-squat and what a lift does to it.Check your links Your rigBuild sheet and measured angles.Start a build sheet LeaderboardsWhere the Silverado 1500 ranks against every stock truck.See where it ranks

Source: auto-brochures.com.

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.

Chevrolet Silverado 1500GMT900, 2007–13