This informational bulletin explains Unscheduled Supplemental Services and the importance of GM Simplified Maintenance Schedules.
full bulletin at NHTSA ↗2010 Chevrolet Cobalt powertrain problems
critical Owners of the 2010 Chevrolet Cobalt have filed 21 NHTSA complaints about the powertrain, typically surfacing around 96,000 miles at roughly $2,500 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See powertrain across all vehicles →
Failure mileage
Complaints
21
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2006 Cobalt | 85 |
| 2007 Cobalt | 27 |
| 2008 Cobalt | 18 |
| 2009 Cobalt | 20 |
| 2010 Cobalt (this page) | 21 |
1crash
1fire
6injuries
3fatalities
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering powertrain on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.
full bulletin at NHTSA ↗This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped.
full bulletin at NHTSA ↗GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This bulletin advises the dealers to be more careful not to damage the transmissions during removal and to package the core properly for return.
full bulletin at NHTSA ↗This service bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operation.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2010 Cobalt's automatic transmission shows a pattern of failure across multiple distinct problems. Owners report complete transmission lockout that prevents any gear engagement, even after pan service and fluid changes. Some vehicles refuse to upshift past second gear while warming up, won't engage park properly, and won't shift out of park—creating a safety hazard if the vehicle rolls away. Transmission jerking and rough shifting occur at cold start and during acceleration, sometimes hard enough to stall the car.
Multiple owners experienced sudden power loss while driving, with some cases tied to check engine lights and sensor codes. One owner hit a permanent P0641 code that persisted even after clearing others. Several transmissions failed at low miles (one under 40,000), while others lasted into the 90,000+ range before problems appeared. Owners report a rebuilt transmission that failed again within two years, and dealers have cited pump solenoids, shift solenoids, transmission modules, and wiring harnesses as culprits. Two owners reported broken wires in the transmission wiring harness. The plastic shift indicator in the dash also fractures, leaving drivers unable to see which gear they're in. One transmission backflow damaged the radiator. Costs cited by owners range from $2,000 for a rebuilt unit to an estimated $700 for radiator replacement.
Same Chevrolet Cobalt powertrain reports on nearby years: 2007 · 2008 · 2009
Failure modes owners describe
Transmission will not shift into any gears
After transmission pan replacement and fluid service, transmission locks out completely and refuses to engage any gears. Occurs whether vehicle is warmed up or cold. Recurs even after rebuilt transmission installation.
When: One owner's second transmission failed after 2 years; another owner's failure occurred after fluid change within 6 months of ownership
Symptoms owners cite: Complete loss of gear engagement; Vehicle will not move in any direction; No shifting response after pan service
Repairs/costs cited: Rebuilt transmission cost $2,000 for one owner; dealer suspected pump solenoid and shift solenoid were rigged to burn out; another owner told transmission needed complete replacement after radiator backflow, estimated $700 radiator repair also needed
Transmission stuck in gear, will not shift past second or into park
Automatic transmission refuses to upshift past second gear after vehicle warms up and will red-line without shifting. Shifter gets stuck in park position, will not fully engage into park, and indicator light goes out, making it unsafe to leave vehicle unattended.
When: Occurs after engine warms up during driving
Symptoms owners cite: No upshift past second gear, red-lining without shift; Shifter stuck in park or will not fully engage park; Shift indicator light goes out; Doors lock when shifter not fully in park; Electronic locks become unusable; Vehicle pulls away at idle without parking brake
Engine power loss and limp mode activation
Vehicle enters 'engine power reduced' mode and cannot exceed 40 mph while on highway. Check engine light remains on, vehicle stays in limp mode. Symptoms include rough idle, slow acceleration, and jerking at specific speeds during gear shifts.
When: While driving on interstate; limp mode persists after restarting
Symptoms owners cite: Engine power reduced mode activated; Speed limited to 40 mph; Rough idle; Slow acceleration at red lights and stop signs; Bucking at 10 mph (hard), then lighter at 20 mph and continuing through acceleration; Check engine light remains illuminated
Codes mentioned: P0107 (MAP/Barometric Pressure Circuit - Low Input), P0452 (EVAP Pressure Sensor - Low Input), P0532 (AC Pressure Sensor A - Circuit Low), P0641 (Sensor Reference Voltage A - Circuit/Open, permanent)
Sudden power loss while driving
Engine power drops without warning, causing vehicle to stall or nearly stall in traffic. Loss affects power steering, speed control, and stability. Occurs multiple times unpredictably and creates dangerous situations, especially in moving traffic or during turns.
When: Occurs without prior warning, multiple times after first incident
Symptoms owners cite: Complete engine power loss; Vehicle stalls or comes to stop in traffic; Loss of power steering response; Loss of vehicle control and stability
Vehicle vibration, stall, and electrical system failure
While driving at highway speed, vehicle vibrates, check engine light illuminates, and engine stalls. After restart, electrical system fails and accelerator pedal becomes unresponsive. Dealer diagnosed transmission module failure; independent mechanic identified transmission wiring harness as the culprit. Failure recurred after dealer repair.
When: At 78,000 miles
Symptoms owners cite: Vehicle vibration; Check engine warning light; Engine stalling; Electrical system failure after stall; Accelerator pedal unresponsive
Repairs/costs cited: Dealer replaced transmission module but failure recurred; independent mechanic diagnosed transmission wiring harness issue but vehicle was not repaired
Transmission jerking, lunging, power loss, and abnormal noise
Vehicle jerks and lunges forward, loses power, and power train warning light illuminates. Abnormal noises heard from front end. Vehicle did not leak but could only be driven at very low speeds home. Failure recurred after diagnostic appointment scheduled with shop.
When: At 96,000 miles
Symptoms owners cite: Jerking and lunging forward; Power loss; Abnormal noises from front end; Power train warning light
Repairs/costs cited: Scheduled diagnostic at McCluskey Automotive but vehicle not repaired; failure recurred
Check engine light, jerky gear shifts, and blown fuses
Check engine light illuminates and vehicle jerks rapidly during automatic gear shifts. Starter fuse blows immediately when starting engine. Owner must shake fuse box before inserting new fuse to temporarily prevent immediate fuse blowout. New ground wire added to transmission control module connection, but failures recurred within hours.
When: At 92,000 miles
Symptoms owners cite: Check engine light illumination; Rapid jerking during gear shifts; Starter fuse blows after engine start
Repairs/costs cited: New ground wire added to transmission control module but did not resolve issue
Transmission gear engagement failure
After fluid change, reverse and forward gears fail to function correctly—reverse moves vehicle forward, forward moves vehicle forward. Dealer diagnosed complete transmission failure requiring replacement and found transmission backflow caused radiator damage.
When: Within 6 months of ownership after fluid change service
Symptoms owners cite: Reverse gear not functional; No gear differentiation; Transmission backflow damage to radiator
Repairs/costs cited: Dealer diagnosed need for new transmission; estimated $700 for radiator replacement due to backflow; owner suspects shifting pin failure rather than full transmission replacement
Shift indicator plastic piece fracture
The plastic shift indicator in the instrument cluster fractures, making it impossible for the driver to see which gear the vehicle is in. Despite being in a sealed enclosure and on a relatively new car, the plastic component fails.
When: At approximately 150,000 miles for one owner; within bumper-to-bumper warranty period (2 years) for another
Symptoms owners cite: Shift indicator fractured; Unable to determine current gear visually
Recalls/TSBs owners mention: Manufacturer made aware of one failure; GM refused warranty coverage once bumper-to-bumper expired
Transmission stall due to wiring harness failure
Transmission stalls while driving. Dealer diagnosed broken wires in the transmission wiring harness as the cause.
When: <UNKNOWN>
Symptoms owners cite: Transmission stalling
Repairs/costs cited: Wiring harness repaired by dealer
Hard shifting with multiple warning lights and rough running
Traction, engine, and wheel sensor lights illuminate. Vehicle exhibits hard shifting, shakes during braking, and engine runs rough with skipping at idle. Owner has completed all available recalls.
When: <UNKNOWN>
Symptoms owners cite: Hard shifting; Traction warning light; Engine warning light; Wheel sensor warning light; Shaking during braking; Rough idle with engine skip
Repairs/costs cited: Brakes and spark plugs replaced; all recalls completed
Transmission failure without warning
Transmission fails completely without any prior warning signs.
When: Less than 40,000 miles
Symptoms owners cite: Complete transmission failure
Ignition cylinder key stuck in ON position
Key becomes stuck in the ON position after arriving at destination. Owner has manual transmission and had to stall engine by dropping clutch to kill it. Poor spring design in ignition cylinder tumbler.
When: Out of warranty by 1 month (bumper-to-bumper expired)
Symptoms owners cite: Key stuck in ON position; Unable to remove key from ignition
Repairs/costs cited: Dealer estimated $300-$400 repair with $100 deductible; owner purchased aftermarket ignition cylinder for $42 and found tumbler spring popped out of place
Recalls/TSBs owners mention: GM agreed to cover $300-$400 repair with $100 deductible after bumper-to-bumper warranty expired
Power steering and brake failure on demand
After starting vehicle and placing it in reverse, both power steering and brakes fail to respond. Issue resolved after engine restart. Power steering warning indicator illuminated then de-illuminated.
When: At 64,000 miles
Symptoms owners cite: Power steering failure; Brake failure; Power steering warning light
Jerking during braking
When brake pedal is depressed, vehicle jerks.
When: At 108,000 miles
Symptoms owners cite: Jerking during braking
Transmission failure requiring engine restart to recover
While driving at highway speed, transmission fails. Vehicle must coast to roadside and be restarted to function again. Dealer unable to diagnose the cause despite inspection.
When: At 72,000 miles
Symptoms owners cite: Transmission failure; Vehicle requires restart to regain function
Repairs/costs cited: Dealer inspected but could not diagnose cause
Rough transmission bucking after cold start
Immediately after starting the car, transmission bucking causes front wheels to slip and stability control light illuminates. Bucking is severe enough that vehicle sometimes stalls. Same issue reported on another owner's identical vehicle.
When: At engine startup
Symptoms owners cite: Rough transmission bucking; Front wheel slip; Stability control light illumination; Vehicle stalling from excessive bucking
Synthesized from 21 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 0 most recent
Had powertrain trouble with your 2010 Chevrolet Cobalt?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the powertrain problem on the 2010 Chevrolet Cobalt?
It's a serious issue. 21 complaints have been filed, including 1 reports involving a crash and 3 fatality(ies). We've classified it as critical based on NHTSA's reported outcomes.
At what mileage does the powertrain typically fail?
Across the 17 complaints that reported odometer mileage, most powertrain failures cluster between 64,000 and 108,000 miles, with the median around 96,000. A quarter of owners report trouble before 64,000; a quarter make it past 108,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2010/Chevrolet/Cobalt.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.