This bulletin provides a procedure on how to check for a battery drain utilizing the Picoscope and how to measure the load on the system that may be causing a drain.
full bulletin at NHTSA ↗2021 Chevrolet Traverse electrical problems
moderate Owners of the 2021 Chevrolet Traverse have filed 21 NHTSA complaints about the electrical at roughly $850 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See electrical across all vehicles →
Complaints
21
Recalls
0
Avg fix
$850
| Model year | electrical complaints |
|---|---|
| 2017 Traverse | 19 |
| 2018 Traverse | 65 |
| 2019 Traverse | 71 |
| 2020 Traverse | 23 |
| 2021 Traverse (this page) | 21 |
| 2022 Traverse | 8 |
| 2023 Traverse | 16 |
| 2024 Traverse | 15 |
| 2025 Traverse | 38 |
When does it fail?
Of the 21 electrical complaints filed for the 2021 Chevrolet Traverse, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Electrical accounts for 24% of all owner complaints filed against this vehicle, across 6 categories tracked.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering electrical 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 service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use for certain repairs, such as Wiring Harness Repairs.
full bulletin at NHTSA ↗This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3055 Set.
full bulletin at NHTSA ↗The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.
full bulletin at NHTSA ↗This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491, E4492, or E6961 and resolution information.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners report a pattern of electrical failures in the 2021 Traverse, with premature alternator and battery failures being the dominant issue. The alternator has failed between 20,000 and 75,000 miles in multiple cases, with some owners replacing it more than once. Failure typically starts with dashboard warnings—"Service Battery Charging System Vehicle May Stall" or "Battery Saver Active"—followed by rapid voltage loss and engine stalling, sometimes without warning lights. These stalls occur at highway and city speeds, causing loss of power steering and inability to restart, creating genuine safety hazards.
A secondary but significant issue is the "Shift to Park" message appearing when the vehicle is already in Park, preventing shutdown and draining the battery overnight. Owners cite existing Technical Service Bulletins (TSB #19-NA-206) suggesting GM is aware of this problem.
A third group of complaints involves infotainment system freezing (radio/display screen going black or unresponsive), dashboard instrument cluster display dropout, and OnStar module failures. One complaint notes the alternator's placement directly under the oil fill cap creates a design vulnerability to oil spillage during routine maintenance. Another alleges odometer fraud at purchase, though this is not an electrical component issue.
Same Chevrolet Traverse electrical reports on nearby years: 2018 · 2019 · 2020 · 2023 · 2024
Failure modes owners describe
Alternator premature failure
Alternator fails prematurely, typically between 20k–75k miles, causing charging system collapse. Some owners have had the alternator replaced twice on the same vehicle.
When: 20,000–75,000 miles; some failures within 2–4 years of ownership despite low mileage
Symptoms owners cite: Dashboard warning 'Service Battery Charging System Vehicle May Stall'; Voltage loss detected (dropping to 11.5V, normal charging voltage not achieved); Engine stalling while driving; Loss of power steering when stalled; Inability to restart vehicle
Codes mentioned: Voltage regulator failure (alternator test failure)
Repairs/costs cited: Alternator replacement cost $1,600 at one dealer; one owner had part purchased from dealership; some covered under extended warranty, others not covered due to expired/excluded warranty.
Recalls/TSBs owners mention: GM refused compensation in at least one case citing expired warranty; TSBs may exist but no recall issued; one case noted manufacturer opened a case after dealer notification.
Battery premature failure / rapid drain
Batteries fail or drain rapidly, with some owners replacing batteries multiple times (up to seven replacements reported) on the same vehicle. Often occurs in conjunction with alternator failure.
When: 20,000–75,000 miles; batteries replaced multiple times on same vehicle within warranty period
Symptoms owners cite: Vehicle fails to start or loses charge rapidly; Battery voltage drops when running (regulator fault causes under-charging); Battery drains overnight when vehicle left running due to 'Shift to Park' failure
Repairs/costs cited: Battery replacement cost $300 (parts store) to unknown cost at dealer; multiple replacements on single vehicle suggest systemic charging issue rather than battery defect.
'Shift to Park' false message / failure to shut down
Vehicle displays 'Shift to Park' message on dashboard even when gear shifter is already in Park position. Prevents vehicle from shutting off, causing engine to continue running and battery to drain.
When: Multiple occurrences on same vehicle; timing not specified in narratives
Symptoms owners cite: Dashboard message 'Shift to Park' when shifter is in Park; Vehicle will not turn off when start button pressed; Engine continues running, draining battery; Driver unable to fully power down vehicle
Recalls/TSBs owners mention: Technical Service Bulletin TSB #19-NA-206 and others exist indicating GM awareness; class action lawsuit referenced; no recall issued despite widespread complaints.
Infotainment system freezing / display failure
Stereo/radio touch screen freezes, goes blank, or becomes completely unresponsive. Instrument cluster display also intermittently goes out.
When: Not specified; one complaint mentions issue persisting 'as of today' in ongoing complaint
Symptoms owners cite: Touch screen completely frozen; Radio screen goes black; Unable to access any part of radio interface; Dashboard instrument cluster display dropout for couple of drive cycles then returns
Repairs/costs cited: One owner pulled fuse to reset; dealer inspection found 'working fine' despite repeated freezing; no successful repair documented.
OnStar module failure / radio module failure
OnStar telecommunications module fails, causing complete radio panel malfunction. Module replacement does not resolve issue; replacement parts not delivered despite orders.
When: Occurred after OnStar Auto Unlock feature was used
Symptoms owners cite: Entire radio panel non-functional after Auto Unlock event; Screen blackened after OnStar module replacement
Repairs/costs cited: OnStar telecommunications module replaced; radio continued to malfunction; dealer stated replacement part was ordered but not delivered on multiple follow-up calls.
Electrical shutdown / loss of all dash power while driving
Vehicle experiences complete electrical shutdown while operating, with all dashboard lights illuminating and then shutting off. Vehicle stalls and becomes immobilized with no steering assist.
When: Various speeds: one at 55 MPH, one at 20 MPH, one at highway speed; multiple occurrences on same vehicle (3 times in 5 days, 2 in busy intersections)
Symptoms owners cite: All dashboard lights light up rapidly and erratically; Complete loss of dash power; Engine stalls; Loss of power steering; Loss of ability to turn on hazard flashers; Unable to unlock doors without manual unlock; No restart capability
Codes mentioned: Service battery warning light illuminated (in some cases)
Repairs/costs cited: Alternator and battery replacement; repairs covered under warranty in at least one case; issue recurred after repair in one complaint.
Alternator design vulnerability to oil spillage
Alternator placement directly beneath engine oil fill cap creates maintenance hazard; any oil spillage during routine maintenance drips directly onto alternator, potentially causing premature failure.
When: Design issue present from manufacture
Symptoms owners cite: Oil drips onto alternator during oil changes or routine under-hood maintenance
Repairs/costs cited: Owner recommends caution during oil changes and suggests need for protective shield bracket or sloped plastic cover.
Synthesized from 21 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
3 times in 5 days, 2021Traverse completely shut off. 2 of those times were in a busy intersection. I couldn’t even turn my flashers on and had to manually unlock my door to get out. Fortunately the third time was in my driveway. I called AAA to tow it to dealer. This is a severe safety issue and hopefully will be covered under my warranty and the extended bumper to bumper warranty.
Odometer Fraud. The contact purchased a 2021 Chevrolet Traverse. The contact discovered that there was a mileage discrepancy after the purchase. The vehicle was a private sale. At the time of purchase, the mileage was 49,000. It was later discovered, after checking the Carfax report, that the mileage was 75,000.
Had electrical trouble with your 2021 Chevrolet Traverse?
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 electrical problem on the 2021 Chevrolet Traverse?
It's a documented issue but not catastrophic. 21 complaints have been filed. Repairs average $850 and most owners catch it before it causes a breakdown.
At what mileage does the electrical typically fail?
Based on the 21 complaints filed, electrical issues most often appear around 46,000 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $850 for electrical 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 electrical?
No active recalls currently cover electrical 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/2021/Chevrolet/Traverse.
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.