Vehicle
Chevrolet Blazer
As with the TrailBlazer, the name covers two different vehicles. The S-series Blazer to 2005 is a compact body-on-frame truck built around the 4.3 Vortec V6, whose central port injection — the spider assembly with its poppet nozzles — is the fault behind most of its rough-running and fuel-trim complaints, and is a known replacement item rather than a diagnosis. The 2019-on Blazer is a transverse front-drive crossover on C1XX with the 2.0 turbo and 3.6 V6, sharing its running gear with the Traverse and Acadia, and the Blazer EV after that shares nothing with either. Establish the generation before trusting anything written about the badge.
Generations
-
First generation (S-10 Blazer) 1983–1994
The original S-10 Blazer, with the 2.8 V6 before the 4.3 arrived; throttle-body injection rather than the later central port system.
- Body styles
- SUV
- Platform
- GM GMT330
- Engines
-
- 2.8 V6 — petrol
- 4.3 V6 — petrol · throttle-body injection
- 2.2 diesel — LQ7 · diesel · Isuzu-sourced
- 2.0 — LG2 · petrol
- 2.2 — LN2 · petrol
- Transmissions
- 4-speed manual · 5-speed manual · 4-speed automatic
- Drivetrain
- Rear-wheel drive · Part-time four-wheel drive with low range
-
Second generation (S-series) 1995–2005
Compact body-on-frame truck on the 4.3 Vortec V6; the central port injection spider assembly is behind most fuel-trim and misfire complaints.
- Body styles
- SUV
- Platform
- GM GMT330
- Engines
-
- 4.3 V6 — petrol · 142–149 kW (190–200 hp) · 339–353 Nm (250–260 lb-ft) · L35 and LF6 Vortec
- 2.2 four-cylinder — LN2 · petrol
- Transmissions
- 4-speed 4L60-E automatic · 5-speed T-5 manual
- Drivetrain
- Rear-wheel drive · Part-time four-wheel drive with low range
-
Third generation (C1XX) 2019–present
A transverse crossover sharing running gear with the Traverse and Acadia — unrelated to the S-series truck.
- Body styles
- SUV
- Platform
- GM C1XX
- Engines
-
- 2.5 four-cylinder — petrol · LCV
- 2.0 turbo four-cylinder — petrol · LSY
- 3.6 V6 — petrol · 230 kW (308 hp) · 365 Nm (269 lb-ft) · LGX
- Transmissions
- 9-speed 9T50, 9T65 automatic
- Drivetrain
- Front-wheel drive · Four-wheel drive
Service information
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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