ABC's March 26 Academy Awards broadcast (see story on Page 40) will mark the debut of an estimated $25 million campaign for General Motors Corp.'s 2000 Chevrolet Tahoe sport-utility vehicle. A spot from Campbell-Ewald
, Warren, Mich., shows off the SUV's ruggedness in Chile's remote Patagonia region. Copywriter: Jon Stewart. Art director: John Clarey.