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U058A Invalid Data Received From DC/AC Converter Control Module B

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U058A refers to a second DC/AC converter. Two converters can make sense when outlets in the cab and in the cargo bed are fed separately or when a high-power unit is added to a small one. GM's 2023 Silverado and Sierra 1500 illustrate how optional such hardware is: because of the chip shortage, trucks built from September 2022 left the factory with the inverter for the 120 V instrument panel and bed outlets inactive and later received an accessory power control module plus a body control module reprogram. Mismatched configuration after such a retrofit is a plausible source of invalid data. No manufacturer documents U058A or names a converter B publicly. U0289 is the lost-communication code. Only the outlets are affected.

Likely causes

Configuration not updated after fitting or retrofitting converter B
Converter B internally faulty or overheated
Bus wiring to converter B damaged

Symptoms

  • One group of outlets dead while others work
  • Outlet warning or service message

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–1,200
Time0.3–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

dc ac converter module b

Related codes

U0289U0589P0364

References: static.nhtsa.gov, static.nhtsa.gov.