I read the hood is same just lights and grille

Tell you what - when you've swapped the grille & the lights - close the hood and tell me if it lines up properly.

I've never done it myself (we don't get the Trackers in my neck of the woods), but the pictures I've seen of conversions, don't look right.

Well looks like you’re right there is a very slight difference between hoods.  Mine will have a slight gap across the center if I go with the Suzuki grille.  Now I need to decide if that’s okay.  It doesn’t really look bad actually but it is there.  I’m down about 190$ for the conversion but was hoping to recoup most of that by selling the chevy parts. 

Well I hummed and hawed about going through with this conversion. I was actually thinking just leave the chef grille and slap a S on it where the bow tie went lol.  But here’s how it looks.  I will also dispel the myth that the grille, lamps AND hood are the only differences, the front core support is also different.  The holes for the wire sockets are slightly different.  So, it works but if I ever need to change my turn lamps I’ll need to pull the lamp assembly out to get the bulb out.  Not awful but does require tools.   So, I have a line on a vitara hood for $60 so I’ll go down and get that I think. 

If I recall correctly, the only lamp bulbs you can change on a GV without removing the grille and the lamp is the headlamp bulb - for turn signals & park lamps, the lamp has to be removed.