Turbo Kit for GMC Sonoma Jimmy (1988-2004) 4.3L

Complete single-turbo intercooled package for GMC Sonoma and Jimmy with the 4.3L V6 (1988–2004 S-series range). Same cast-manifold T3 street package used on the Chevrolet S10 / Blazer 4.3L platform. It includes cast manifolds, crossover with wastegate block, front-mount intercooler, oiling, boost controller, turbo timer, battery relocation and fuel-system parts. Most installs keep A/C and power steering. On a stock motor, plan on a low-boost street tune around 8–10 psi. Not for Syclone / Typhoon — factory-turbo trucks are excluded.

Why this kit

• T3 turbo with a .57 trim compressor and .50 / .63 A/R housings
• Cast manifolds plus crossover, band clamp and wastegate adapter block
• Front-mount intercooler, oiling kit and battery relocation
• Boost controller, turbo timer, air filter and fuel regulator included

Package Includes

• (1) T3 turbocharger with oil fitting gaskets and mounting studs
• (2) Cast turbo manifolds plus crossover, band clamp and wastegate adapter block
• (1) Front-mount aluminum intercooler
• (1) Aluminum intercooler piping kit: (2) 2.5" straight pipes, (2) 90°, (2) 60°, (2) 45° bends, (2) 2.5" 90° silicone couplers, (6) 2.5" straight silicone couplers, (16) stainless worm-gear clamps
• (1) Turbo oil line kit: high-strength feed line, high-temp 550 psi return, fittings, gaskets and hardware
• (1) External wastegate kit (flange on included adapter block / crossover)
• (1) Manual boost controller with install kit
• (1) Battery relocation kit, full aluminum, cables, straps and hardware
• (1) Slim reversible cooling fan
• (1) Electronic turbo timer with LED display and wiring
• (1) Adjustable fuel pressure regulator with gauge
• (1) Oil catch can with install kit
• (1) Coolant bung plus -6AN billet aluminum fuel filter
• (1) Air filter
• (1) Heat wrap roll

Turbocharger Specs

• Type: T3, wet-float bearings, balanced
• Compressor: .57 trim wheel, .50 A/R housing, 3" inlet, 2" outlet
• Turbine: .63 A/R housing
• Oil inlet: 1/8" NPT
• About +power at 8–10 psi on a healthy stock 4.3L with a proper tune; big HP claims need a built engine and supporting mods — not a stock-truck dyno result

Exact Fitment — GMC Sonoma Jimmy

• 1988–2004 GMC Sonoma with 4.3L V6
• 1988–2001 GMC Jimmy (S-series / compact) with 4.3L V6 when the engine and mounts match
• One Make per listing — this product is GMC only
• Not for Syclone / Typhoon — factory-turbo 4.3L trucks use different manifolds; fitment does not hold for this NA cast kit
• Chassis-specific downpipe and exhaust beyond the turbo flange are not included
• Intercooler piping is universal and needs cutting and fitting per chassis

Not Included

• Chassis-specific downpipe and exhaust beyond the turbo
• Larger injectors, fuel pump and ECU tune (required)
• Clutch upgrade, boost gauge and wideband
• Oil-pan return bung if your setup needs one

Installation Notes

• Professional installation strongly recommended. Expect cutting and fitting of the universal piping
• The manifolds are street cast, not equal-length tubular: stronger and more affordable, with a different spool character
• Oil return must drain by gravity; prime the turbo with oil before first start and check for leaks
• Keep boost near 8–10 psi until fuel and tune are upgraded, and let the turbo timer handle cool-down

FAQs

Does this fit a Syclone or Typhoon? No. Factory-turbo Syclone/Typhoon manifolds differ — this kit is for naturally aspirated 4.3L Sonoma / Jimmy.

How much power will it make? A healthy stock engine at about 8–10 psi with a proper tune is the street baseline. Bigger numbers need a built engine and supporting mods.

Can I keep A/C and power steering? Most installs keep both; confirm clearance during mock-up.

Is it plug-and-play? No. You still need injectors, a fuel pump, an ECU tune, a downpipe and some pipe fitting.