- Chevrolet S-10
Chevrolet S-10/GMC Sonoma Manufacturer General Motors Production 1982–2004 (North America)
Predecessor Chevrolet LUV Successor Chevrolet Colorado / GMC Canyon (North America only) Class Compact pickup truck Layout Front engine, rear-wheel drive / four-wheel drive Platform GMT325 Wheelbase 108.3 in (2,751 mm) (reg. cab short bed)
117.9 in (2,995 mm) (reg. cab long bed)
122.9 in (3,122 mm) (ext. cab short bed)
The Chevrolet S-10 is a compact pickup truck from the Chevrolet marque of General Motors. When it was first introduced in 1982, the GMC version was known as the S-15 and later renamed the GMC Sonoma. A high-performance version was released in 1991 and given the name of GMC Syclone. The pickup 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. An electric version was leased as a fleet vehicle in 1997 and 1998. Together, these pickups are often referred to as the S-series.
The current S-Series remains in production in Brazil.
First generation Production 1982–1993 Assembly Shreveport, Louisiana, United States Engine 1.9 L Isuzu I4
151 cu in (2.5 L) Iron Duke I4
173 cu in (2.8 L) 60° V6
262 cu in (4.3 L) 90° V6
2.2 L Isuzu Diesel I4
5-speed Borg Warner T5 manual
The first compact pickup from General Motors was the rebadged Isuzu KB sold since 1972 as the Chevrolet LUV. The 1973 Arab oil embargo forced GM to consider designing a domestically-produced compact pickup truck. As usual, parts from other GM chassis lines (primarily from the GM G-body intermediates) were incorporated. The first S-series pickups were introduced in 1982. The Chevrolet and GMC models were identical apart from the grille, tailgate and assorted insignia. An extended cab and "Insta-Trac" four wheel drive were added the next year along with two new engines.
The sport utility S-10 Blazer and S-15 Jimmy debuted in 1983; GM was the second to introduce compact sport utilities behind Jeep but ahead of Ford. This trend occurred again where 4-door variants were introduced in March 1990 as 1991 models alongside the similar 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 discontinuing 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 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. Added to this was the 4.3 L V6 Vortec W code engine. This generation's last year was 1993.
The Vortec is essentially the standard Z code 262 cu in (4.3 L) engine. The difference is the W code used a balance shaft, roller cam shaft, different heads, and Central Port Injection. The 1992 and 1993 engine came in either a 195 hp (145 kW) or 205 hp (153 kW) rating. The High Performance version came with a larger diameter Y pipe, and was only installed in some of the Blazers and S-10 Jimmies as well as the S-10 Pickups
Years Engine Power Torque VIN code 1982–1985 1.9 L LR1 Isuzu I4, 2 barrel 84 hp (63 kW) 101 lb·ft (137 N·m) A 1982–1985 2.8 L LR2 60° V6, 2 barrel Rochester 110 hp (82 kW) 148 lb·ft (201 N·m) B 1984–1985 2.2 L LQ7 Isuzu Diesel I4 58 hp (43 kW) 93 lb·ft (126 N·m) S 1985–1990 2.5 L LN8 Iron Duke TBI I4, 92 hp (69 kW) 132 lb·ft (179 N·m) E 1986–1993 2.8 L TBI 60° V6 125 hp (93 kW) 150 lb·ft (203 N·m) R 1983–1984 2.0 L LQ2 I4, 2 barrel 84 hp (63 kW) 101 lb·ft (137 N·m) Y 1988–1995 4.3 L LB4 Vortec V6, TBI 160 hp (119 kW)–
180 hp (134 kW)
230 lb·ft (312 N·m)–
235 lb·ft (319 N·m)
Z 1990–1993 2.5 L L38 Iron Duke I4, TBI 105 hp (78 kW) 135 lb·ft (183 N·m) A, E
The Sonoma GT was a performance package available on the 2WD regular cab short bed Sonoma. It was available for the 1992 model year only as an entry-level version of the GMC Syclone. A total of 806 were built. The truck was powered by a high output L35 Vortec 4.3 L V6. It featured central multi-port fuel injection and produced 195 hp (145 kW) and 260 lb·ft (350 N·m) of torque. It was equipped with a 4L60 automatic transmission and a limited-slip differential with 3.42:1 gearing.
Modified by Prototype Automotive Services of Troy, Michigan, it was fitted with the Syclone interior package featuring black cloth bucket seats with red piping, a special gauge package, and a floor shift console.
Some 1992 and 1993 Sonomas came with a factory equipped L35 W code engine. For 1993 no specialty labeling or limited edition tags were known to be used with the W code engine. Production totals for these vehicles are unknown.
This GMC came with an LB4 4.3L V6 with lower compression pistons and a turbocharger. They produced ~280 hp.
Second generation Also called GMC Sonoma
Production 1994–2004 (North America)
Assembly Shreveport, Louisiana, United States
Linden, New Jersey, United States
São José dos Campos, Brazil
Engine 2.2 L I4
4.3 L V6
Transmission 4-speed 4L60-E automatic
5-speed Borg-Warner T-5 manual (1994–95 I4)
5-speed NV1500 manual (1996+ I4)
5-speed NV3500 manual (V6)
Length 190 in (4,826 mm) (short bed)
203 in (5,156 mm) (ext. cab)
205 in (5,207 mm) (long bed)
Width 67.9 in (1,725 mm) Height 63.5 in (1,613 mm)
The second-generation trucks arrived in the 1994 model year. All of the special models (the Syclone, Typhoon, and Sonoma GT) were discontinued, but the changes to the pickup brought it in line with its major competitor the Ford Ranger. The Iron Duke 4 cylinder and 2.8 L 60° V6 engines were retired, the 4.3 L Vortec V6 was enhanced, and a new 2.2 L 4 cylinder engine (which had been introduced in 1990 on various FWD GM compact and mid-size platforms) became the engines of choice to power the second generation of S-10's.
Much of the chassis components were the same as the first generation (the A-frames between the first and second generation were the same although they were originally sourced from GM's G-body vehicle lineup), along with the steering knuckle, leaf springs, and differential assembly but suspension and axles were greatly enhanced.
Generally, for the 2WD trucks, the 8.5" rearend was only used when it came with both a manual transmission and the large 4.3 L (262 cu in) V6 engine; it was an option for 4WD trucks with either transmission. This was also the year that GM introduced the ZR2 Offroad Package.
For 1995, a driver's side air bag was added. In 1996 the 4.3 L engine was refreshed, and a third (rear) door was added for extended cab models, along with the sportside bed option. In 1998, the exterior, interior, brakes, and 2.2 L I4 engine were refreshed, along with a "next-generation" supplemental restraint system that added a passenger side air bag. "Auto-Trac" all-wheel drive also became an option starting in 1999 for the 4WD Blazers. The SS package was replaced by the "Xtreme" package. In 2001 a Crew Cab option was added and was available in 4WD and automatic transmission only. The S10 extended and short cabs were discontinued in 2003 and the S10 crewcab was discontinued in 2004 in North America.
Base 2WD models came with 15x6.5 inch wheels with directional vents, Xtreme and ZQ8 models came with 16x8" wheels while 4WD models (including the ZR2) used 15x7" wheels. The 14-inch (360 mm) wheels used on the first generation were discontinued.
Second-generation S-series were also produced locally in Brazil; and are still in production even though the North American version of the S-series was discontinued in 2004. Brazilian S-10s have a different front grille, lamps and bumper, and are available with a 2.8 L diesel engine built by MWM with 140 hp (104 kW) and a 2.4 L Petrol/E-96h ethanol FlexFuel engine with 147 hp (110 kW).
The 2010 S10 is produced in Latin America only, as of right now. It is offered in four different trim levels: Colina (base), Tornado, Executive, and Advantage. The drivetrains are the 2.4 L flexpower engine and the 2.8 L turbo diesel motor. It has an enhanced safety system including collision avoidance, steel ladder type frame, two stage multileaf rear springs, crush zones, side door beams, PASSlock system, remote keyless entry, and driver and passenger side airbags. It also has features to keep it looking good throughout the life of it, such as a corrosion resistant frame, galvanized steel body panels, advanced clear coat paint, double wall welded pickup box, and stainless steel exhaust.
The Chevrolet S-10 SS was a high performance version of the S-10, introduced in 1994. Fewer than 3000 SS's were produced yearly on average. When introduced, the SS was sold in only three colors: Onyx Black, Summit White, and Apple Red. The SS was discontinued in 1998. In 1999, it was replaced by the S-10 Xtreme.
A 4.3 liter V6 (which was optional on regular S-10s) was the primary engine used in the SS version, producing between 180 and 195 hp (145 kW). The SS included lowered suspension (96-98), cosmetic changes such as a different grille, body-colored bumpers, 16" wheels (96-98), and other sporty touches. All SS versions were regular cabs. A step-side version was available from 1996-1998. The SS option package was only available with an automatic transmission and 3.42 posi-traction rear-end.
The ZR2 package is an off- road package available for the second generation Chevy S-10. The ZR2 package included a 4-inch (100 mm) wider track width, 31" BFG all-terrain tires, 2 extra inches of ground clearance, fender flares, and an 8.5" chevy 10- bolt differential in the rear with 3.73:1 gears.
The 2wd S-series pickup shares several front suspension components with the GM G-body platforms. Along with the fact that the optional 4.3 liter V-6 shares several characteristics and dimensions of the early small block Chevy V-8 it has become a popular platform for Hot Rodders. Since the introduction of the S-series the ingenuity of its owners has made the V8 installation one of the most popular American domestic engine swaps. With relative ease the V-8 swap has seen almost every size small block Chevy displacement produced from 262 in³ to the large 400 cu in (6.6 L) engine, including the popular LS series engines. Some owners have even been able to install the big block GM engines such as the 396-454 in³ engines with minor modifications.
The chassis and running gear are also a common swap under older cars and pickups. This gives the advantage of using off the shelf parts, full independent front suspension, disc brakes and a complete late model drivetrain. Most commonly, these are retrofitted under the body of an early 1950s Chevy pick up. 
Years Engines Power Torque VIN code 1994–1995 2.2 L 2200 I4, MPFI 118 hp (88 kW) 130 lb·ft (176 N·m) 4 1996–1997 2.2 L Vortec 2200 I4, SFI 118 hp (88 kW) 138 lb·ft (187 N·m) 4 1998–2003 2.2 L Vortec 2200 I4, SFI 120 hp (89 kW) 140 lb·ft (190 N·m) 4 or 5 1994–1995 4.3 L Vortec 4300, TBI 150 hp (112 kW)–165 hp (123 kW) 230 lb·ft (312 N·m)–235 lb·ft (319 N·m) Z 1992–1995 4.3 L Vortec 4300, CPI 195 hp (145 kW)–195 hp (145 kW) 250 lb·ft (339 N·m) W 1996–2004 4.3 L Vortec 4300, SEFI 180 hp (134 kW)–190 hp (142 kW) 245 lb·ft (332 N·m)–250 lb·ft (339 N·m) W, X ('03-'04)
Engine code options
- 4- 2.2 L w/ MPFI or SFI,
- 5- 2.2 L w/ SFI and Flex Fuel Capable,
- W- 4.3 L w/ CPI,
- Z- 4.3 L w/ TBI,
- X- 4.3 L w/ SFI,
- X- ('03-'04) 4.3 L w/MFI
The eighth digit of the VIN denotes the engine code.
- ^ Schroeder, Don (December 1992). "GMC Sonoma GT". Car and Driver. http://www.sportmachines.com/wiki/tiki-index.php?page=Car+and+Driver+Dec+1992.
- ^ The Definitive S-10 Frame Swap Vehicle List at The Jalopy Journal
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