New Gmc Sierra Makes Debut
There’s a new full-size truck in the GMC garage this year: The all new Sierra im proves on the past with increased interior space, increased cargo space, all-new sheet metal and three powerful engine options.
All extended-cab models get a third door and the track has been widened for additional on-road stability.
For information on the powertrain options, see the Chevrolet Silverado. The GM cousins share mechanicals.
For ‘99, the Jimmy and Envoy get the new Autotrac part-time four wheel-drive system that engages only when needed.