Firebird Seatbacks Sag...?

There's a nylon bushing where most GM seats pivot that's worth taking a look at. Get to a parts breakdown from GM and check it out.

Joe--ASE Certified Parts Specialist & 10th Ann.Club Tech Director '80 Carousel Red Turbo T/A, 27k orig. '79 "Y89" 400/4 speed 10th Ann. T/A, 57k orig '84 Olds 88 Royale Bgm 2 dr, 307 "Rocket" (lol), 143k and still going....

I might be totally off base because I've never looked at the seat guts on an

84 Bird or Blazer. However, I had an 86 Cadillac (I know, the seats don't look the same, but the guts may be similar). There was an L-bracket on the hinge in those seats. It was a shitty, low-quality bracket and it had a tendency to bend backwards. BUT, it would only bend to a certain point and then it would stop. I ordered a new bracket from Cadillac, put it in, and that one bent within a few months. Finally, I asked my cousin (who worked as a welder at a place that made semi-trailers) to make me one out of heavy gauge steel with a little arm brace. He did, I installed it, and never had the problem again. So, I could be COMPLETELY wrong about this when it comes to the Bird and Blazer, but I thought I'd throw it out as an idea just in case.

FH674

One other possibility. When you bend the seat forward, at the back of bottom cushion, you might see two screws. These were meant to hold little plastic donuts in place. The plastic pieces aren?t that big, maybe a half inch high, but they do make a difference and are easily available from lots of Camaro parts vendors. Your local upholstery shop will probably have a bunch of them. Since they are so cheap to get and so easy to install, I?d suggest you try that first.