badge-engineered Oldsmobile Bravada. New heavy-duty and off-road suspensions appeared in 1984 along with a hydraulic clutch, while the big news for 1985 was the discontinuation of the Cavalier's 2.0 L OHV I4 in favor of Pontiac's 2.5 L "Iron Duke" OHV I4. The OHV-derived 2.2 L diesel engine and 1.9 L SOHC gas engine, both from Isuzu, were gone the next year, leaving just the Iron Duke and updated 2.8 L V6. A much-welcomed 4.3 L V6 was added for 1988, and anti-lock brakes came the next year. The GMC S-15 became the GMC Sonoma in 1991, and the Sierra trim packages were dropped to avoid confusion with the new GMC Sierra full-size pickup. The GMC Syclone also appeared that year. The Sonoma GT bowed in 1992. Added to this was the 4.3 L V6 Vortec W-code engine. This generation's last year was 1993. Appearance packages The S-10 Baja was an optional appearance package that was put on any four-wheel drive S-10 (regular-cab with short-box, regular-cab with long box and extended-cab with short box) from 1989 to 1991. The Baja was available in three colors: Midnight Black, Apple Red and Frost White. The Baja option also included a roll bar with off-road lights, front tubular grille guard with fog lights, tubular rear bumper, an underbody shield package (transfer case shield, front differential shield, fuel tank shield, oil pan/steering linkage shields), a suspension package, Chevrolet windshield banner, Baja decals on the box sides, and one inch wide body striping. Extra-cost Baja options included a cargo-net end-gate, aluminum "Outlaw" wheels, and a special box-mounted spare tire carrier with aluminum wheel. 1991 S-10 Bajas came with special "BAJA" embroidered red and gray bucket seats and unique red door panel trim. The S-10 Cameo and Cameo EL were appearance packages available for the two-wheel drive S-10 between 1989 and 1991. When first introduced in 1989, the Cameo had three color choices; Apple Red, Frost White or Midnight Black. In 1991, two-tone paint schemes were available, as well as additional exterior features such as a wraparound front bumper with fog lamps, lower body ground-effects moldings and wheel flares, a flush-fitting tailgate valance, rear roll pan (state laws permitting), and "Cameo" lettering on the doors and tailgate. Other appearance packages included the S-10 Back Country, predecessor to the Baja, the S-10 Top Gun edition, the GMC Sonoma SST, the GMC S-15 Gypsy Magic and GMC Jimmy