get an interceptor,theyr awesome data machine,is that a word?i have em and wouldnt go without em.full of diagnostic info ,and you can clear all those codes you keep getting.and itll tell ya wich codes they are.I think its a wise choice plus the difference you can use on the parts for the plx I gave ya.I think foggy still has the interceptor tho that he had for sale for like 35 bucks,check him out.then you have more to play with maybe take youre blocks out and lower your torsion bars then get an alignment.have fun bud,and happy bday
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .