A suspension lift kit gives your truck better clearance and a sharper look, but it comes with a high price tag for parts and labor. These kits usually cost around $2000, and you should always budget for an alignment and potential new tires to avoid uneven wear.
Timing is everything for this upgrade. The best time to pull the trigger is when your tires are already worn out, so you can swap them for larger ones at the same time. This saves you from paying twice for mounting and balancing.
The 0% window is a deadline, not free money. If you have a remaining balance after the 18 months are up, you will be charged interest on the outstanding amount at the standard rate.