I have to change the rocker cover gaskets on my 97 Bonneville 3800 series 2.
Whats the best ones to use as I don't want to be replacing them very often.
The front one looks okay to do but the rear seems to be a pain.
I will also be doing the A/C compressor, drier, orfice tube and new belt while I have it all apart.
Fun....WOW.

Got mine from autozone, felpro I think. Make sure you also get the rubber grommets for the bolts as well.

Or the GM ones are nice.

The only thing I've heard about valve cover gaskets and grommets is that any new set is better than the set you have on now.

The rear one is a pain; however, the more you work on your engine, the more shields and brackets you'll lose. I replaced my front one in almost total darkness, but waited until I pulled my engine to replace the rear one.

Piece of cake.

Being an L26 your gaskets are cheap. Go FelPro, better price than the dealer and the same gasket. Also ensure you have new grommets. The grommets maintain the pressure on the gasket.

Rear one is easy in 96-99, because the alt bracket doesn't overhang the rear cover. Pull a couple small things and you'll be in there. Torque is 89in bls.