Is my Lifted Truck Legal in Washington

Is my lifted truck street legal in washington state?


Our Handy Guide for Washington Vehicle Equipment Laws

The laws surrounding lift kits and other modifications for trucks and vehicles vary greatly from state to state. What’s perfectly legal in one state could be an offense that gets you pulled over in another. It’s important to always make sure to check the laws where you are going. We’ve compiled a guide below for the state of Washington to help assist you when deciding on what upgrades to get.

Washington Truck Laws

Washington state has very detailed legislation and regulations for street legal laws and they are laid out in both the Revised Code of Washington and the Washington Administrative Code. Suspension lifts, aftermarket wheels and tires, performance shocks, aftermarket bumpers, and grille guards are all allowed, which is great news for off-roading enthusiasts.


The allowable height of bumpers in Washington is limited by the vehicle’s GVWR and is measured to the bottom of the bumper. Bumper height regulations is the major limiting factor for lift kits in Washington, so make sure you adhere to these regulations before installing a lift kit.

Below is a breakdown of the limitations:

Vehicle GVWR / Max. Bumper Height
Under 4,501 / Front: 24 inches & Rear: 26 inches
4,501-7,500 / Front: 27 inches & Rear: 29 inches
7,501 and over / Front: 28 inches & Rear: 22 inches

Max Overall Vehicle Dimensions

Wide: 102 inches
Tall: 14 feet
Length: 40 feet

Wheel & Tire Restrictions

Tires must maintain a minimum of 1/16 in. tire tread depth. Washington does allow grooving if the tire is designed for it. On the wheels lug nuts can not extend past the outside of the wheel or tire.


In Washington State, properly functioning brakes are required on all 4 wheels and they need to be able to stop a vehicle traveling at 20 miles per hour within 30 feet.


Suspension lifts are not specifically limited in Washington State, but it is against regulations for body lifts to be homemade. Please keep in mind that anti-sway bars are required.


Any replacement or aftermarket frames need to be FMVSS certified. Not really important for lifted trucks, but frames can be no lower than the sidewall height of the tires.


Vehicles are allowed to have additional lights in Washington beyond headlights and tail lights. If you do have extra lighting on your truck, keep in mind that no more than 4 front lights can be on at a time while you’re driving. You are required to have a minimum of two headlights and two tail lights. While you can have additional lights, there are restrictions on how many of each you can have installed, you are allowed two of each of the following:

*Spot Lights
*Fog Lights
*Auxiliary Passing Lights
*Auxiliary Driving Lights


If your vehicle does not have a windshield you are required to wear glasses or safety goggles. If your vehicle does have a windshield it is required to have windshield wipers.

Exhaust Systems

You are required a muffler in Washington and are not allowed to have exhaust cutouts or bypasses. Also, 5 counties in Washington State require emissions testing on vehicles.

South Sound Trucks Knows Washington Equipment Laws

At South Sound Trucks, we are well versed on the equipment laws in Washington and other surrounding states. We make sure to follow regulations when completing aftermarket work. By having our service department customize your truck you can rest easy knowing you won’t have to worry about your lifted truck not being street legal.

So what are you waiting for? Check out the online inventory of used trucks in Olympia, then visit South Sound Trucks to test drive the truck of your dreams and find a new weekend warrior to hit the trails with.