Do Chevy Blazers have transmission problems?
Yes. Some Chevy Blazer models, particularly early-2019 through 2021 versions with the 9-speed automatic, have reported transmission-related issues such as harsh shifting, hesitation, and, in rare cases, failure. That said, reliability varies by model year, engine choice, and maintenance, and many Blazers operate without problems.
Model years and transmissions
The Chevrolet Blazer lineup largely uses a 9-speed automatic transmission across its engines, including the 2.0L turbo and the 3.6L V6. In certain years, GM issued software updates and service actions aimed at improving shifting behavior and diagnosing transmission-related complaints. Not every vehicle experiences these issues, and some owners report solid reliability over many miles.
Common symptoms reported by owners
Here are the symptoms most frequently mentioned by owners and reviewers. The list reflects what has been observed in consumer feedback and safety databases, but it does not mean every Blazer will exhibit these problems.
- Rough or harsh shifts during acceleration or deceleration
- Delayed engagement when moving from Park/Neutral to Drive
- Shuddering or slipping during gear changes, especially at higher speeds
- Unusual noises near the transmission area or a burning smell
- Transmission temperature warnings or occasional limp-home mode in rare cases
These symptoms can stem from software issues, valve body wear, sensor data, or other hydraulic control problems and may respond to updates or targeted repairs.
Official responses and repairs
Chevrolet and GM have instituted service actions and recall campaigns aimed at addressing shifting behavior in affected model years. The actions typically involve software updates, diagnostic checks, and, when a defect is identified under warranty, component repair or replacement. Open recalls or campaigns are resolved at no charge to the owner while the vehicle remains under the coverage.
Service campaigns and recalls
GM has issued recalls and service campaigns to address reported shifting issues in certain Blazer production windows. These actions often focus on updating the transmission control module software and performing diagnostic checks to pinpoint root causes such as hydraulic control faults or sensor data irregularities.
- Software updates to the transmission control module and related systems
- Targeted diagnostics to identify specific fault conditions
- Component repair or replacement under warranty when a defect is confirmed
Owners should verify recall status and campaign eligibility using their vehicle identification number (VIN) via NHTSA’s recall database or Chevrolet’s owner portal.
Warranty coverage and replacement options
When a defect is found or a fault is confirmed as covered under the vehicle’s warranty, repairs—including potential transmission replacement—are typically covered. In some situations, technicians may perform software updates or replace valve bodies, sensors, or other related components to restore proper shifting behavior.
Because outcomes depend on the specific VIN and production date, owners should consult a dealer about current coverage and diagnostic results if symptoms appear.
Tips for buyers and current owners
If you’re considering a Blazer purchase or you already own one, the following steps can help mitigate risk and speed up any necessary fixes.
What to check before buying or during ownership
- Check for open recalls or service campaigns on NHTSA.gov using the VIN, and confirm that any recall work has been completed
- Review the vehicle’s maintenance history for transmission software updates or related servicing
- Take a thorough test drive to evaluate shifting at a variety of speeds and temperatures
- Ask for a pre-purchase inspection if buying used, with emphasis on the transmission and transmission-control software
If you notice symptoms listed above, contact a Chevrolet dealer promptly for diagnostic testing and discuss whether any service campaigns apply to your vehicle.
Summary
The Chevy Blazer does not universally suffer from transmission problems, but there is a documented subset of model years—primarily early 2019–2021—with reports of shifting irregularities that led to recalls and service actions. Symptoms can range from harsh shifts to hesitation or loss of engagement, with software updates and targeted repairs often solving the issues. Prospective buyers should verify recall status, review maintenance history, and, if issues arise, seek timely professional diagnostic work. For many owners, the Blazer remains a reliable, family-friendly midsize SUV beyond the warranty period.
