Are they old used calipers or new ? Or reconditioned ?
I recently went through a sort of similar episode with the rear disc calipers on my dads 04 Tahoe after doing front/rear brake pads.
Rears would get Hot on test drive. Really Hot
Turned out to be the calipers had bad spots or maybe gunked up deeper up inside the bores and would not retract properly in their new positions with new thick pads.
Had been rarely driven in the past 15 years before he bought it about a year ago with only 65k miles on it. Rear pads were originals and inboard pads were really thin.
Put the old pads back on and it did fine.
He said leave it - I said NO . lol
He didn't want new calipers , so I made a compromise that worked out.
... a whole 'nother story ...
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