That sux dude. I had to sell my 07 when I had my daughter. Id say go for the concept the had for the Colorado SS. Pretty much a 2wd trailblazer setup or just sa f*** it and get a LS1 in there I think it was sum dude in Tennessee that did that not sure been outta that scene for a few years. remember tho in 07 GM made a few changes in the I4 and I5. All this you probably know.