What size brakes??

[Trenton Sauer]

I have a 1991 gmc c2500. Im getting new brakes for it. I just had the tires off and I looked at the brakes and measuring the brakes never crossed my mind. I don't wanna drive back to the shop and take the tires off does anyone know that size brakes it has?

 

[Fuzzy]

Is it 6 lug or 8 lug? If it's 6 you have the 7200lb GVW if its 8 you have 8600lb GVW or smaller/larger as far as brakes are concerned.