If your floor jack isn't low enough to get under the side of the car, use ramps to get the front of the car higher up to allow the jack to fit under the side sill. I use Race Ramps for this, and they work really well, but there are plenty of options out there for this. If your floor jack fits under the side of your car without issue, continue on down to Step 2.
Set your jack stands at the desired height. Make sure they're all the same height. If the jack stands aren't the same height, the car will wobble while on the jack stands and you greatly risk the car falling off of them! Set each of the jack stands near the area of the car where they will be positioned.
If you want to use wheel chocks to keep the car from rolling forward or backwards while jacking the car up, put them in place now.
Note: I’ve never had to do this, but you’re welcome to use chocks if you want the extra measure of safety. Safety is the most important thing, after all!
Position the floor jack under the outer rail under the car. This is the rail that the side sill bolts onto, and is the same rail that you'll be using to position your jack stands. Ensure the floor jack is far enough under the rail that it doesn't get pushed out by the weight of the car as you lift it. If the jack gets pushed out, the lifting pad will take a chunk out of the side of your car!
Carefully and steadily jack the car up until it clears your jack stands, then position the jack stands. Keep an eye on how stable the car is while jacking it up off the ground.
Front jack stand position:
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