EV Diagnostics
Verified EV diagnostic knowledge page

Chevrolet U0101

up devices causing no power in 4WD low range. • Erratic electric power steering boost potentially associat

DriveNot yet established by verified evidence. Because the supplied evidence references potentially erratic electric power steering boost, assess actual vehicle behavior and seek professional evaluation rather than relying on this code alone.
ChargeNot yet established by verified evidence. The supplied evidence does not address charging operation or charging safety.
ServiceContact a Chevrolet/GM dealer or qualified service facility for diagnosis, particularly if warning lamps, display/gauge irregularities, or steering-assist concerns are present.
Confidence95%

Quick answer

For Chevrolet vehicles within the supplied applicability records, U0101 is included in official GM/NHTSA bulletin 13-08-116-001K among numerous communication DTCs that may occur with certain electrical concerns. The supplied evidence does not establish a complete code definition, a specific failed part, or a vehicle-specific repair.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

Video guides

Watch Videos

Relevant videos play here without leaving this diagnostic page.

No sufficiently relevant embeddable video has been accepted for this diagnostic yet.

Videos are supporting material and never override OEM or regulator evidence.

1. What does U0101 mean?

For Chevrolet vehicles within the supplied applicability records, U0101 is included in official GM/NHTSA bulletin 13-08-116-001K among numerous communication DTCs that may occur with certain electrical concerns. The supplied evidence does not establish a complete code definition, a specific failed part, or a vehicle-specific repair.

2. Technical explanation

The verified bulletin evidence lists U0101 alongside U0100, U186B, and U1862 as communication codes that may be present. The supplied diagnostic title/meaning is incomplete and should not be treated as a full technical definition of U0101. The evidence also references flickering displays or erratic gauge readings, an SES/MIL/CEL, diesel power-up devices with no power in 4WD low range, and erratic electric-power-steering boost; it does not establish that every listed condition applies to every vehicle or that U0101 alone causes any of them.

3. What system is affected?

Communication-related diagnostic area. No more specific affected module or circuit is established by the supplied verified evidence.

4. How serious is this code?

Unknown. The supplied verified evidence does not provide a severity classification.

5. Symptoms you may notice

  • An SES, MIL, or CEL may be set with numerous communication DTCs, including U0101.
  • Erratic gauge readings or flickering displays are referenced in the 2024 bulletin evidence.
  • The bulletin evidence references erratic electric power steering boost, but the supplied excerpt is incomplete and does not establish a direct U0101-only relationship.
  • The bulletin evidence references no power in 4WD low range for diesel power-up devices; this is not established as applicable to EV models.

6. Possible causes

  • Not yet established by verified evidence. The supplied bulletin excerpts do not identify a specific root cause for U0101.

7. Can I still drive the vehicle?

Not yet established by verified evidence. Because the supplied evidence references potentially erratic electric power steering boost, assess actual vehicle behavior and seek professional evaluation rather than relying on this code alone.

8. Can I charge the vehicle?

Not yet established by verified evidence. The supplied evidence does not address charging operation or charging safety.

9. What you can safely do

  • Record all stored DTCs and any warning messages before clearing codes.
  • Note whether gauges or displays are erratic or flickering.
  • If steering assist behaves erratically, arrange professional assessment.
  • Use a qualified Chevrolet/GM service facility for diagnosis; do not attempt high-voltage-system repairs.

10. Step-by-step troubleshooting

  1. Have a qualified technician retrieve all diagnostic trouble codes and vehicle data.
  2. Compare the vehicle’s exact model year, configuration, and symptoms with the complete applicable manufacturer bulletin.
  3. Not yet established by verified evidence: a specific diagnostic sequence, wiring test, connector test, module test, or repair procedure.

11. When to contact service

Contact a Chevrolet/GM dealer or qualified service facility for diagnosis, particularly if warning lamps, display/gauge irregularities, or steering-assist concerns are present.

12. What the service center may check

  • Retrieve all DTCs, including communication codes referenced by the bulletin: U0100, U0101, U186B, and U1862.
  • Review complete official GM bulletin 13-08-116-001K or 13-08-116-001J for applicability and manufacturer diagnostic guidance.
  • Not yet established by verified evidence: the exact inspections or component tests required for this vehicle.

13. Possible repair or resolution

  • Not yet established by verified evidence. The supplied excerpts do not provide a verified repair resolution for U0101.

14. Affected vehicles

15. Related TSBs / service bulletins

  • GM bulletin 13-08-116-001K, published through NHTSA on March 31, 2025 (NHTSA Manufacturer Communication PDF 11017244): references U0101 among numerous communication codes and references gauge/display, power-steering, and diesel 4WD-low concerns in the supplied excerpt.
  • GM bulletin 13-08-116-001J, published through NHTSA on April 30, 2024 (NHTSA Manufacturer Communication PDF 11000162): references U0101 among numerous communication codes and references erratic gauges/flickering displays in the supplied excerpt.

16. Recall information

  • Not yet established by verified evidence. No recall information was supplied.

17. Official manufacturer information

Official source: NHTSA-hosted GM Manufacturer Communication 13-08-116-001K: https://static.nhtsa.gov/odi/tsbs/2025/MC-11017244-0001.pdf

19. Frequently asked questions

What does U0101 mean on the supplied Chevrolet evidence?

The supplied verified evidence identifies U0101 as one of several communication DTCs referenced in GM bulletins. A complete technical definition is not established by the supplied evidence.

Does U0101 prove that a steering problem is present?

No. The bulletin excerpt references erratic electric power steering boost, but it does not establish that U0101 by itself proves or causes that condition.

Does U0101 affect charging?

Not yet established by verified evidence. The supplied sources do not address charging.

Is there a confirmed repair for U0101?

Not yet established by verified evidence. The supplied excerpts do not state a repair resolution.

20. Sources & verification

ReferenceVerified
Chevrolet U0101: up devices causing no power in 4WD low range. •… | EV Diagnostics