I have the same problem, just had it scanned and got the codes CO550 and C0244. I think its my ebcm. sounds expensive... any thoughts?
EM MORAD or the boneyard. im going through the same shyt right now....i got a howling noise on the highway tho....gonna try both front bearings and hope i dont have to do the EBTCM also....
00 Silvermist GTP
E85|GenV|3.2|#65's|1.95 YT RR w/105's|Pacesetters|N*/LQ4|PRJ rewire/255lph 13.2 @ 104. No Cam No IC.