The throttle body leak really isnt a problem with the caddys, if everything else checks I would fall back to the 02 bank one sensor one, go to gm and get one, when I was at the dealer I would see 02's that were aftermarket bad and reading wrong, you sound like you know what your doing, and youve done some good diagnosis
again my opinion without actually seeing the car suspect b1s1 random misfire lean bank one? Makes sense
if you had a tech 2 scanner you could watch them and see for sure
thanks jim
Friday, February 23rd, 2007 AT 6:30 PM