In a wide-ranging interview, GM's president talks about the automaker's product blitz, Cadillac's EV push and fresh investments in V-8s, U.S. plants.

The Silverado and mechanically similar Sierra are by far GM’s top sellers in the U.S., and major profit generators.

General Motors is pausing production at a pickup-truck plant in Mexico for several weeks, crimping output of its top-selling ...