The GMC Sonoma was a compact pickup truck from General Motors. When first introduced in 1982, it was known as the S-15 - a sister model to the Chevrolet S-10 pickup. A high-performance version was the GMC Syclone. The Sonoma was also sold by Isuzu as the Hombre from 1996 through 2000. There was also an SUV version, the Chevrolet S-10 Blazer/GMC S-15 Jimmy. Together, these trucks are often referred to as the S-series.
The S-series was replaced by new models, the Chevrolet Colorado, GMC Canyon, and Isuzu i-Series, in 2004.
1982
The first S-series trucks were introduced in 1982. The Chevrolet and GMC models were identical apart from the grille. An extended cab and "Insta-Trac" four wheel drive were added the next year along with two new engines. New heavy-duty and off-road suspensions appeared in 1984 along with a hydraulic clutch, while the big news for 1985 was the discontinuing of the Cavalier's OHV I4 in favor of Pontiac's Iron Duke. The OHV-derived 2.2 L engine and Isuzu 1.9 L were both 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 are 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, and balance shafts were added to the 4.3 L V6 in this generation's last year, 1993.
Engines:
- 1982-1985 - 1.9 L Isuzu I4, 2-bbl, 84 hp (63 kW) and 101 ft.lbf (137 Nm) (VIN A)
- 1982-1985 - 2.8 L 60° V6, 2-bbl, 110 hp (82 kW) and 148 ft.lbf (201 Nm) (VIN B)
- 1983-1985 - 2.2 L Diesel I4, 58 hp (43 kW) and 93 ft.lbf (126 Nm), (VIN S)
- 1983-1984 - 2.0 L OHV I4, 2-bbl, 83 hp (62 kW) and 108 ft.lbf (146 Nm) (VIN Y)
- 1985-1989 - 2.5 L Iron Duke I4, TBI, 92 hp (69 kW) and 132 ft.lbf (179 Nm) (VIN E)
- 1986-1993 - 2.8 L 60° V6, TBI, 125 hp (93 kW) and 150 ft.lbf (203 Nm) (VIN R)
- 1988-1993 - 4.3 L Vortec 4300 V6, TBI, 150-165 hp (112-123 kW) and 230-235 ft.lbf (312-319 Nm) (VIN Z)
- 1990-1993 - 2.5 L Iron Duke I4, TBI, 105 hp (78 kW) and 135 ft.lbf (183 Nm) (VIN E)
Sonoma GT
A special model was sold in 1992, the Sonoma GT. It used a 4.3 L L35 V6 which produced 135 hp (101 kW). The appearance was similar to the 1992 GMC Syclone "super-truck".
1994
The second-generation trucks appeared in 1994. All of the special models (The Syclone, Typhoon, and Sonoma GT) were gone, but the changes to the truck brought it in line with arch-rival Ford Ranger. The Iron Duke and 2.8 L 60° V6 engines were dropped, leaving just the 4.3 L Vortec and a new 2.2 L engine, itself a derivative of the old Cavalier OHV. A high-output version of the 4.3 was offered on the "SS" model.
The 4.3 L engines were refreshed for 1996 and a third (rear) door was added for extended-cab models. The Isuzu Hombre version also appeared that year. The exterior and 2.2 L engine were refreshed for 1998, and "Auto-Trac" all wheel drive was optional starting in 1999. An electric S-10 also appeared that year, balanced with an "Xtreme" sports model.
Engines:
- 1994-1997 - 2.2 L OHV I4, MPFI, 118 hp (88 kW) and 130 ft.lbf (176 Nm) (VIN 4)
- 1994-1995 - 4.3 L Vortec 4300, TBI, 155-165 hp (115-123 kW) and 235 ft.lbf (319 Nm) (VIN Z)
- 1994-1995 - 4.3 L Vortec 4300, CMFI , 191-195 hp (142-145 kW) and 260 ft.lbf (353 Nm) (VIN W)
- 1996-1997 - 4.3 L Vortec 4300, CSFI , 175-180 hp (131-134 kW) and 240 ft.lbf (325 Nm) (VIN W or Y)
- 1996-1999 - 4.3 L Vortec 4300, CSFI , 180-190 hp (134-142 kW) and 245-250 ft.lbf (332-339 Nm) (VIN X)
- 1998-1999 - 2.2 L Vortec 2200 I4, SFI , 120 hp (90 kW) and 140 ft.lbf (190 Nm) (VIN 4)
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