<P> The GMT400 - based Suburbans were introduced in the 1992 model year . The similar pickup truck models had switched to the newer platforms in the 1988 model year . Both 2WD and 4WD models, designated "C" and "K", were offered, as well as half ton and three - quarter ton ("1500" and "2500") models . </P> <P> The base engine for all variants was the small - block 5.7 liter (350 cu in) V8 . The big - block 7.4 L (454 cu in) V8 was optional for the 2500 series . The optional 6.5 L Turbo diesel was available on all models--though rare on the 1500 series . The 6.5 L Turbo diesel used in the Tahoe was detuned to 380 lb ft (520 N m) torque due to the limitation of the 8.5 - inch (220 mm) axle capacity . 1500 Suburbans with the 6.5 L Turbo diesel used the 14 bolt axle from the 2500 series . Ground clearance was 6.9 inches, the approach angle was 18 degrees for the K - 1500 (28 degrees for the K - 2500) and the break over angle was 18 degrees . </P> <P> Transmissions included the 4L60 four - speed automatic in the 1500 series, and the heavier duty 4L80 four - speed automatic in the 2500 series . The manual transmission option from the previous generation was dropped . </P> <P> The GMT400 series introduced independent front suspension . The 2WD models used coil springs and 4WD models used torsion bars in the front suspension . All models used a live axle and leaf springs in the rear . </P>

When is the new body style suburban coming out