How can I tell if I already have the t/s lift or not? Mine seems to sit higher then others ones I have seen. I want to do the t/s lift but I know if it is already done I can't do it anymore. Thanks.

 

the 4x4s sit higher than the 4x2s to begin with so make sure you are comparing to another 4x4 (going by your sig) the other option is to measure the height to the fender, ill be home tomorrow so i can measure the height of mine (bone stock) for you, and if yours is about 2" higher than mine you have the lift, (btw measure from the ground to the bottom of the fender flare)

 

You can look under the rear suspension and see it the shackles were replaced.

 

The front measures 34-1/2 inches and the rear measures 35-1/2 inches. This is from the ground to the beginning of the fender.

 

mine measures 34-1/2 front and back . . . i blame leaf spring sag but you do NOT have the t/s lift, so go for it and have fun while you are doing it