2003 Tahoe 4.8 4x4

[Hyder12]

Changed rotors all the way around. Once finished started up pumped up breaks and had service break system light and the parking break light on. Fluid is full have breaks just light is annoying and don’t know why came on. Lights were not on before rotors were replaced

 

[wjburken]

Changed rotors all the way around. Once finished started up pumped up breaks and had service break system light and the parking break light on. Fluid is full have breaks just light is annoying and don’t know why came on. Lights were not on before rotors were replaced

Have you put a good code reader that can read ABS codes and see what it’s showing? That’s where I’d start.

Is the ABS light on as well?

Might also check the vacuum hose going to your booster to make sure it didn’t work loose somehow.

 

[Fless]

Moved you here from the General Discussion section since this is a drivetrain issue.

 

[Hyder12]

Have you put a good code reader that can read ABS codes and see what it’s showing? That’s where I’d start.

Is the ABS light on as well?

Might also check the vacuum hose going to your booster to make sure it didn’t work loose somehow.

I haven’t used scanner yet. The abs light only comes on once in blue moon but goes off min you start forward. Checked and vacuum line is good

 

[rockola1971]

When you squeezed the caliper pistons back in so you could install the thicker brake rotors, you may have ended up with a leaking piston seal and now have air in your brakes. Start checking for brake fluid on rotors and calipers.