The following points should be considered when purchasing a suspension lift kit :
Height of the Lift: Will you be playing in the mud, driving over boulders or just want an bolder lifted stance when driving around town? If you live in a flood or hurricane prone area a little lift makes a lot of sense.
Lift the Front, Back or Both: You can purchase inexpensive lift kits to simply lift the rear of your truck or more expensive kits to lift the front and back different heights. Can You Use Stock Wheels and Tires: Some of the more expensive truck lift kits depending on height of lift will require you to change out your stock tires and wheels adding to the cost of the project.
Are Shocks Included: Does the truck lift kit provide performance shocks to support the desired lift and performance? Some kits require you to upgrade to a performance shock adding to your cost of the lift.
Basic Vehicle Modifications: Some truck lift kits require you to extend your steering column, lift your bumpers, lower your fan shroud and connected parts to prevent overheating. Some may require exhaust modifications and some welding and/or cutting may be necessary.
Vehicles Factory Warranty: Installation of certain suspension lift kit components may void your vehicle’s factory warranty as it pertains to certain covered parts; check with your local dealer for warranty coverage before installation of a lift.
Professional Installation or Do It Yourself: Some of the suspension lift kits can be somewhat tricky to install and may require more than your two hands. If your good with tools, mechanical stuff and have a buddy who’ll help, you probably want have any problems. All the kits I reviewed come with complete instructions and tech support from the manufacturer.

Nice post,
This tips are very nice. This tip will be very useful for all the truck buyers. It will be specially useful for fresh buyers.
Regards,
Pickup Trucks
Cool Tips,
This tips are one the most interesting tips i have ever read to choose truck lift kits. This tips are explained in very simple and clear way.