So, I need an upstream O2 on my '99 GTP and was told to get an AcDelco, problem is I can only get one online for $30 and it'll take a couple weeks, or at the local GM Dealer for /$86/.

When calling up the four local parts stores they all had Bosch (lowest for $53) and/or Denso (lowest for $46). Wondering if I have to get an AcDelco, or if Denso is okay?

Thanks