GM stop/start and LIN codes: battery monitor is not automatically bad. See the manufacturer document, vehicle conditions, exclusions and questions for a qualified shop before assuming a repair.
This is a research summary of a manufacturer communication, not a diagnosis for your car, a DIY repair procedure or confirmation of warranty or recall eligibility. No qualified technician has approved a repair for your individual vehicle here.
This historical communication is conditional. The current revision, VIN/build eligibility, measured diagnosis and any warranty or recall decision are not established here. Ask the manufacturer or a qualified shop to check the complete current document.
Read the General Motors original: Battery-monitor/LIN DTCs with stop/start inoperative · Check open recalls by VIN at NHTSA Source date: 2022-10; research checked: 2026-11-01.
What prompted this manufacturer document
- The source addresses MIL/stop-start complaints with battery-monitor and LIN-related codes.
- Wiring, battery condition or grille-shutter communication can be relevant; the code is not proof of a failed battery sensor.
Which vehicle conditions must be checked
Each row below retains its own conditions. Do not combine engines, years or models across rows to create new applications. A listed model is not proof that a particular VIN is affected.
- Buick Enclave · 2018, 2019, 2020, 2021, 2022, 2023 · KL9 required; exact equipment/module applicability not established for every listed code
- Buick Encore · 2016, 2017, 2018, 2019, 2020, 2021, 2022 · KL9 required; exact equipment/module applicability not established for every listed code
- Buick Envision · 2016, 2017, 2018, 2019, 2020, 2021, 2022 · KL9 required; exact equipment/module applicability not established for every listed code
- Buick LaCrosse · 2017, 2018, 2019 · KL9 required; exact equipment/module applicability not established for every listed code
- Cadillac ATS · 2017, 2018, 2019 · KL9 required; exact equipment/module applicability not established for every listed code
- Cadillac CTS · 2019 · KL9 required; exact equipment/module applicability not established for every listed code
- Cadillac XT4 · 2019, 2020, 2021, 2022, 2023 · KL9 required; exact equipment/module applicability not established for every listed code
- Cadillac XT5 · 2017, 2018, 2019, 2020, 2021, 2022, 2023 · KL9 required; exact equipment/module applicability not established for every listed code
- Cadillac XT6 · 2020, 2021, 2022, 2023 · KL9 required; exact equipment/module applicability not established for every listed code
- Chevrolet Equinox · 2018, 2019, 2020, 2021, 2022 · KL9 required; exact equipment/module applicability not established for every listed code
- Chevrolet Malibu · 2017, 2018, 2019, 2020, 2021, 2022 · KL9 required; exact equipment/module applicability not established for every listed code
- Chevrolet Traverse · 2018, 2019, 2020, 2021, 2022, 2023 · KL9 required; exact equipment/module applicability not established for every listed code
- GMC Acadia · 2017, 2018, 2019, 2020, 2021, 2022, 2023 · KL9 required; exact equipment/module applicability not established for every listed code
- GMC Terrain · 2018, 2019, 2020, 2021, 2022, 2023 · KL9 required; exact equipment/module applicability not established for every listed code
- Chevrolet Cruze Gen II · 2016, 2017, 2018, 2019 · VIN B; KL9 required
- Chevrolet Silverado 1500 New · 2019 · KL9
- Chevrolet Silverado 1500 · 2020, 2021 · KL9
- Chevrolet Silverado 1500 LTD · 2022 · J21 VIN 5 W/Y; KL9
- GMC Sierra 1500 New · 2019 · KL9
- GMC Sierra 1500 · 2020, 2021 · KL9
- GMC Sierra 1500 Limited · 2022 · J21 VIN 5 8/9; KL9
- KL9 and the actual module/equipment must match.
- The source-wide code list is not proof every code applies to each model.
Codes recorded in this document
A root listed only as an appearance has no separately verified meaning here. Preserve every suffix and module name; a shared root does not transfer a repair branch to another vehicle.
| Root | Raw form | Meaning in this source, if established |
|---|---|---|
| P15FF | P15FF | Battery-sensor message-counter performance issue in this GM context. |
| P16DC | P16DC | Battery-sensor timing performance issue. |
| P305D | P305D | Cranking DC/DC converter control-circuit high indication. |
| P305E | P305E | Cranking DC/DC converter control-circuit low indication. |
| U01B0 | U01B0 | Communication lost with battery-monitor module. |
| U0284 | U0284 | Communication lost with grille-shutter actuator 1. |
| U0285 | U0285 | Communication lost with grille-shutter actuator 2. |
| U1345 | U1345 | ECM LIN bus 1 fault. |
| U135A | U135A | Communication lost with shift-to-park actuator. |
| U135E | U135E | Communication with TCM over the ECM LIN 1 path is lost. |
| U1501 | U1501 | LIN communication fault; host/module specificity still requires vehicle information. |
| U1510 | U1510 | Grille-shutter 1 communication path in the cited ECM context; other host-module contexts must not be conflated. |
| U1511 | U1511 | Grille-shutter 2 communication path in the cited ECM context; confirm the reporting host module. |
What an owner can record safely
- Record all messages and recent battery/service history.
Bulletin eligibility questions
The source uses these gates before choosing a professional diagnostic branch. A missing answer means applicability is unknown; passing one gate never authorizes a repair.
- GM stop/start RPO
What the source does not prove
- Do not disconnect the battery sensor as a reset; that interferes with learned information.
- A code or message alone does not establish a failed part, a safe-to-drive decision or an approved repair for this VIN.
- A service bulletin is not automatically a recall or free warranty repair. Confirm current eligibility directly.
Questions for the repair shop
- Was the host LIN circuit checked, and is stop/start simply unavailable under normal operating conditions?
- Does a later revision or a current recall change the source's original advice?
- What measurement or inspection confirms the cause, and how will the repair be verified?
Open source-review issue
- Q2-008: The global GM table includes non-US and potentially mismatched model-year rows. This page does not establish those entries as US applications.
- Q2-012: A matching code and model name alone do not satisfy the manufacturer's diagnostic gates; symptom, build and test conditions still need checking.
The uncertain field is not used here to claim a current fitment, repair or market-wide failure.
Read the original record
The linked communication may be revised after the research date. Compare its document number, exact vehicle table, diagnostic preconditions and exclusions with a qualified technician. This page paraphrases selected facts and does not reproduce the manufacturer procedure.
Sources and scope
- General Motors — Battery-monitor/LIN DTCs with stop/start inoperative (15-NA-087) Document: 2022-10 · Research checked: 2026-11-01
Research snapshot: 2026-11-01. Source documents may have newer revisions. Verify current instructions and VIN eligibility with the manufacturer.