97-98 = 28 lbs
99-00 = 26 lbs
01-02 = 28 lbs
If that's doesn't help, look in the LT1/LT4 and LS1/ LS6 Part numbers thread under general repairs and maintenance.
2000 Camaro SS M6, Alpine White, H/C
2009 Cobalt SS Turbo, M5, Black, Bone Stock and staying that way!