• Alabama - Arkansas
• California - Indiana
• Iowa - Missouri
• Montana - Oregon
• Pennsylvania - Wyoming

Be aware that increasing the wheel track by using spacers or similar doodads thicker than 1/4 inch is a very bad move. On medium- and heavy-duty trucks, the rear bumper must be within 30 inches of the ground when the truck is unloaded. For more information, check out www.pennsylvania.gov.

Rhode Island
For all vehicles with a 10,000-pound or less GVWR, you can raise the chassis or body, no more than 4 inches from the OE height. For more information, check out www.rhodeisland.gov.

South Carolina
You can't modify either up or down by more than 6 inches from the original height. For more information, check out www.southcarolina.gov.

South Dakota
There aren't regulations for the suspension, per se, but the taillights can be no higher than 72 inches. For more information, check out www.southdakota.gov.

There can be no more than 4 inches between the body floor and the top of the frame. The distance between the bumper and the ground is 24 inches for GVWRs of 4,500 and less; 26 inches for 4,501 to 7,500; and 28 inches for 7,501 to 10,000. For more information, check out www.tennesee.gov.

Laws concern lighting but not bumper height or even lift blocks. The headlamps must be mounted between 24 and 54 inches from the ground, the taillamps between 15 and 72 inches, and the foglamps between 12 and 30 inches. For more information, check out www.texas.gov.

After being told it's a "mathematical nightmare" to figure out by one local trooper, we got the scoop from another trooper. If your vehicle's wheelbase is 100 inches or less, the most you can lift can be determined by this equation: Maximum Lift = Wheelbase x Wheel Track / 2,200. For 4x4 wheelbases beyond 100 inches, you can lift a total of 8 inches, but you'll have to remember your new tires do that equation (so if you lift 4 inches, you can go up in tire size that much too). For more information, check out www.utah.gov.

For trucks and multipurpose vehicles, the allowable bumper height increase for front bumpers and rear bumpers depends on the GVWR. For 4,500 pounds and less, it's 24 inches front and 26 inches rear. For 4,501 to 7,500, it's 27 inches front and 29 inches rear, and for the 7,501 to 10,000, it's 28 inches front and 31 inches rear. For more information, check out www.vermont.gov.

Don't even think about driving on these highways, if there are more than 28 inches between the bumpers and the road and if your truck falls in the 4,500-pound GVWR. For 4,501 to 7,500 pounds, the front bumper must stay lower than 29 inches and 30 inches at the rear; for 7,501 and 15,000 pounds, it's 30 inches at the front and 31 inches at the rear. For more information, check out www.virginia.gov.

You can lift your truck in Washington without fear, as long as the kit is manufactured by an aftermarket company and is designed for your make and model of truck, as well as installed the right way. You know this already, right? Right? Body lifts can't use more than a 3-inch spacer and are not allowed to raise the body more than 4 inches above the frame, after all the components are installed. For more information, check out www.washington.gov.

Washington, D.C.
The headlamps on every motor vehicle (and that means your motorcycle too, if you have one) must stay below 54 inches, and each taillamp must not be higher than 72 inches. The low for the front is 24 inches, and for the rear it's 15 inches. But, we would hope you'd be altering your truck in the other direction. For more information, check out www.districtofcolumbia.gov.

West Virginia
The most space you can have between the body and the frame is 3 inches, while the acceptable gap between the bumpers and the ground is 31 inches for a 10,000-pound GVWR or less.More weight than that, you're free and clear. For more information, check out www.westvirgina.gov.

Wisconsin law says that vehicles with as much as an 8,000-pound GVWR can be pushed 5 inches above the OE height, and the tires can be increased by as much as 4 inches in radius over the factory size, equaling an acceptable 9-inch lift. For more information, check out www.wisconsin.gov.

There are no official statutory guidelines for bumper height, frame height, rear blocks, or shackle lifts-all laws referring to these alterations say vehicles must simply be in "safe" working condition. For more information, check out www.wyoming.gov.