Hello there I just recently bought my first truck. It's a 2003 GMC Sierra. 4x4, extended cab, SLE, 5.3L.

I just had a few questions.

1. I bought the truck and it was already lifted. How would I go about lowering it back to stock height?

2. If I did bring it back down to normal size, I'm considering buying 20 inch silverado ss rims (always liked the look).. would these fit on my truck and what size tires should I consider getting with these?

3. Just out of curiosity, would a grill from an 03 silverado fit on my sierra? Or are they different sizes?

All I can think of right now

Thanks