Is a GMC truck just a dressed up Chevy truck?

If it wasn't for the ex forcing sale I'd still have Black/Grey GMC 1 Ton 4x4, 454, 4.11's. 11 MPG uphill or down. Era of the 454SS. That truck rocked !
Your truck, or the 454SS? The SS wasn't as fast as the Little Red Express, and I smoked one at Keystone Raceway in '92 with My '88 ShelbyZ, and that was not on the best tires.