Bought an old 02' Sierra that has been lowered a bit. Previous owner bought it this way. I'm looking to re-do the suspension to a 4-6 drop, but I need to determine what was done currently so I know which parts need switching.

Rear springs were re-arched and brought down to a 4" drop.

Front is approx 2-3" drop.

How do I determine if the front was done with springs/coils/spindles? Springs are pretty rusty. Is there any easy way to determine which parts are stock vs modified? I'm thinking its simply a drop spring or cut stocker, but not sure.

 

I'm not a suspension guru, but I'd bet pics would help.

 

Measure from center of hub to bottom of fender. I believe stock NBS are 19.5" F and 21.5" R

 

Go take a look at the suspension for part numbers or brand names on it. Most aftermarket should have an obvious name on it or wont be the standard iron looking metal. They are usually an obvious or bright color.

Take a look at the:
Front: Shocks, springs, spindles, control arms

Rear: Shackles, leaf springs, hangers, shocks.


Also Measure from the fender well (lowest part of the fender over the middle of the wheel) to the ground, and get your tire size and post those numbers up.


Just to make sure is it an 02 sierra 1500? reg cab, ext cab?