2020 Chevrolet Impala Other or unknown Problems
- Complaints
- 7about this part
- Share
- 47%of 15 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 7 complaints about the other or unknown of the 2020 Chevrolet Impala, 47% of the 15 complaints for this model year. 1 of these say a crash was involved, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I was driving down the highway in anchorage ak I heard a loud bang like a gunshot , when the vehicle was inspected I was told basically Evap, fuel system , fans , electrical , Cadillac converter exploded was the loud bang ! Serious issues have caused the vehicle to be inoperable !”
NHTSA complaint #11615402, filed 2024-09“As I was driving my car in the interstate the car started making noises and began to shake and then it stop driving normally. I did my best to move to the curve and then called a towing truck to get the car. The car transmission stopped working properly. I conducted an analysis on this car in the internet and it has been written that the transmission has a manufacturer's defect. Also, the car dealer did a diagnostics test on the vehicle and proved that the transmission is not responding. The car dealer said the repair is not covered. This car is less than 5 years old. …”
NHTSA complaint #11598638, filed 2024-07“I Took My Car To Castle Villa Park On July 8 2025 And Explained To Tony That Check My Car In That It Sound As If It Was A Hub Bearing My Car Was Dropped Off At 7:00 AM Until Around 1:00PM I Was Told I Need A Tire To See If It Was My Hub Bearing Which Didn’t Make Sense To Me So I Ask For A Supervisor I Was Then Inform That They Could Tell If They Switch My Tires Later On I Was Told It Was A Tire Came Took My Car To Firestone This Sat 07/19/2025 I Was Told I Didn’t Need Tires It Is In Fact Both Of My Hub Bearing So I Paid 100.00 Diagnostic Fee To Castle And Risking My Life Driving My Car When…”
NHTSA complaint #11674888, filed 2025-07“The component is the Evaporative Emission Control System (EVAP) Vapor Canister Purge Valve.The internal diaphragm or solenoid of the factory-installed purge valve has worn out prematurely or became contaminated, locking it permanently into a stuck-open position.The Manifestation or (Symptoms): The stuck-open valve continuously drafts raw fuel vapor and unmetered air into the engine intake manifold. …”
NHTSA complaint #11744373, filed 2026-06“While driving the RPMs decrease while the speeding is increasing. At time you can feel the car slow down when pushing the accelerator and then it slightly jumps forward. The car can be going 75mphs and the RPMs will be between 0 and 1. This also causes it to lag.”
NHTSA complaint #11492193, filed 2022-11Related service bulletins
- 11037555Sep 26, 2026This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
- 11037253Sep 4, 2026This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
- 11035340Jul 21, 2026PI to help diagnose A/C concern
- 11030974Apr 1, 2026This preliminary information communicates information about how to determine if a wheel and tires size change is available.
- 11030092Mar 9, 2026This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.
- 11030091Mar 9, 2026This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
- 11029950Mar 2, 2026This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss
- 11027697Jan 16, 2026This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's
- 11027701Jan 14, 2026This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered vehicles and advises of warranty direction.
- 11027601Jan 8, 2026This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
Other or unknown: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2020 | 7 | 47% |
| 2019 | 5 | 18% |
| 2018 | 16 | 27% |
| 2017 | 31 | 27% |
| 2016 | 22 | 20% |
| 2015 | 51 | 17% |
| 2014 | 90 | 14% |
| 2013 | 39 | 14% |
| 2012 | 27 | 10% |
| 2011 | 49 | 10% |
| 2010 | 44 | 10% |
| 2009 | 89 | 11% |
| 2008 | 62 | 8% |
| 2007 | 39 | 6% |
| 2006 | 26 | 5% |
| 2005 | 18 | 3% |
| 2004 | 43 | 4% |
| 2003 | 41 | 6% |
| 2002 | 34 | 4% |
| 2001 | 37 | 5% |
| 2000 | 15 | 2% |
| 1996 | 3 | 3% |
| 1995 | 1 | 2% |
| 1994 | 1 | 7% |
Other parts of the 2020 Chevrolet Impala
3 complaintsSteering
3 complaintsAir bags
2 complaintsFuel system
2 complaintsTransmission and drivetrain
2 complaintsEngine
1 complaintsExterior lighting
1 complaintsLane departure
1 complaintsSeat belts
1 complaintsSeats
1 complaintsBody and structure
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints
← All problems reported for the 2020 Chevrolet Impala
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology