
Had to replace rusted out rear rotors at 50k miles
I had similar but it was a consistent squeak noise. Dropped an entire $20 on replacement aftermarket brake hardware for all 4 wheels rather than just reusing old/worn parts. Brand I used had something or other 'quite-glide' using a combination of stainless steel construction, PTFE coating and vulcanized rubber that isn't found on the GM OEM hardware. Squeak has thus far not returned on my Gen1!