Vortec 4800 4.8L V8
Have a 2003 gmc 1500. 4.8. It has 130000 miles on it. It was all stock ran perfect. Everthing worked. Newly rebuilt 4l60 with about 2000 miles on it. Anyway, I put a btr stage 3 cam kit, cold air kit, trailblazer stall, longtube headers wuth cat delete and it has been tuned. Now all my lights...