A new data point regarding "warped rotors"
 

Last weekend I discovered that my pads had prematurely worn out, no budget for "brick & mortar" parts. Turns out I had some used pads from my last brake job laying around that have enough material left for a week or 2 driving.

All of a sudden my "warped rotors" are fine. I guess that my last set of cheap ceramic pads were the cause of the shuddering, not the rotors. They did shudder from the first, come to think there was shuddering going on when I replaced the pads that now don't.

Do not try this at home kids, re-using pads is bad practice.

Man I have put 10 sets on my 07 2LT it has over 200k on it. Every time it was due to shuddering.

From what i have learned using wrong material pads can cause problems. If she didnt come with ceramics, dont be upset when you put em on and you have problems is what i was told.:p can anyone verify?

I coundnt get non ceramics if that makes any sense

I ran some ceramics on the SS for 40k from 30k to 70k on the stock rotors with no problems, or dust. Might be, I picked the right match by dumb luck, they were Akebono.

Didn't the HHR come with ceramics stock? And the Brembo's were semi metallic?

No..standard stock stufff....I have ceramics on both my cars and no problems..the LS stops really really good with them..slightly touchy even. The SS is about the same as stock except no dust.

Well, I just put brand new cheap ceramic pads on. The "warped rotor" symptoms are still not there. I guess it was just the old pads sucked, maybe that's whey they wore out 10,000 miles earlier than I expected.

Great info don
Sounds like the pads maybed layed down some material and the new
Ones cleaned them up?

No, I think it was just the particular pads. The difference was immediately apparent. NoName cheap ones that came with a set of new rotors that got used on the last HHR.