his rims.

it has regular straight 5 star rims...what'* so big about that? :?:

Here they are

Whats up with my rims? Should they not be on a Bonneville? (and since I am new here, why would Tam be concerned with them?)
By the way, what is the little black nub for that is sticking up between the defrost vents? I know that the one on the left is for the twilight sentinal, but my 92 doesn't have the one in the center.

Under WOT it may cut out the compressor temporarily, but the vacuum reservoir/booster is there to ensure that the settings don't start changing by themselves just because the vacuum went away for a few seconds (or more).

I'd start by finding your vacuum reservoir under the hood (for the '93 and similar, it'* the large squarish plastic box on the firewall just inboard of the master cylinder vacuum booster) and check the vacuum line connections there. Look for any disconnected or broken lines. You should also not hear any continuous wheezing or hissing noises from the dash, except perhaps when changing the vent settings.

Basically you're either losing your vacuum via a leak, or you don't have enough in the first place due to excess backpressure and a general lack of intake manifold vacuum.

The black nub is the thermometer I think. You must have the electronic climate control in your car. Yep thats a temperature reader. Tam don't like Grand Prixs thats all. Nothing against you or your car. There'* nothing wrong with your rims at all. They still fit. Just not the factory Bonneville rims.

Ya..those are the 16" 5 star Grand Prix rims

Regarding the rims, did GM screw up or did someone do a swap?
I can't locate the vacuum reservoir, inboard of the master cylinder on this 99 is the heater motor assembly. I will check my 92, then trace the same vacuum lines to the reservior on the 99.
Also, I don't have climate control, so the black nub mystery continues.
Bob

1. Somebody swapped rims

2. Its a dummy I believe.

This black ball in the middle of the defrost vent, like you said earlier, is what your talking about, right?----------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------