NHTSA ID Number: 10201275
Manufacturer Communication Number: PIT5750A
Summary
This Preliminary information communicates an issue with the battery goes dead and provides diagnostics tips on inspecting the LIN bus.
Condition
Some customers may comment of a dead battery. In addition to the dead battery, they may comment on any of the following items:
– Slow engine
crank
– Auto Start/Stop feature inoperative, if equipped
– Radio stays on or fading out very slowly after ignition is turned off and RAP has been cancelled
– Front or rear heated seats inoperative
– DTC’s U1524, U1526, U1555, U155D
Cause
The cause of these concerns could be the BCM staying awake due to an input from a LIN Bus. It can be difficult to diagnose these types of cases. Many are misdiagnosed as the BCM being at fault and it is then unnecessarily replaced. There are two known areas that have been found, which can short out LIN Bus circuits 6133 and/or 4115 for the front/rear heated seats. If this happens, it can cause the BCM to stay awake and draw down the battery.
NOTE: Even if a truck is NOT equipped with rear heated seats, these circuits are still in the harness.
4 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
| CHEVROLET | SILVERADO 1500 | 2019 |
| CHEVROLET | SILVERADO 2500 | 2020 |
| GMC | SIERRA 1500 | 2019 |
| GMC | SIERRA 2500 | 2020 |
1 Associated Document
Manufacturer Communications
Bulletin No.: PIT5750A
Published date: 06/10/2021
MC-10201275-9999.pdf 567.537KB
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- BUILDS A LASTING SHIELD AGAINST RUST AND CORROSION: Forms a moisture-blocking dielectric barrier that molecularly bonds to metal surfaces and subsurfaces; perfect for protecting trailers, marine gear, or tools stored in salt-heavy, humid environments.
- DELIVERS LONG-LASTING, MARINE-GRADE LUBRICATION: Clings to metal like a magnet and resists pressure, friction, and washout; ideal for lubricating locks, hinges, cable pulleys, and marine components exposed to heavy loads, rain, salt spray, tidal moisture, or constant vibration on boats and coastal equipment. DELIVERS LONG-LASTING, MARINE-GRADE LUBRICATION: Clings to metal like a magnet and resists pressure, friction, and washout; ideal for lubricating locks, hinges, cable pulleys, and marine components exposed to heavy loads, rain, salt spray, tidal moisture, or constant vibration on boats and coastal equipment.
- FREES RUSTED PARTS WITH DEEP PENETRATION: Industrial-strength penetrating oil releases corrosion on frozen bolts, marine fittings, and seized engine parts; penetrates to free up when other products fail in salty, humid, or wet environments on boats, farm tools, or machinery.
- PROTECTS ELECTRONICS AND PREVENTS GALVANIC CORROSION: Safe on circuits, battery terminals, and sensors, CorrosionX forms a dielectric film rated over 39,000 volts that displaces moisture and stops galvanic corrosion between dissimilar metals in harsh environments.
- QUALIFIED BY THE U.S. NAVY FOR ADVANCED MARINE CORROSION PROTECTION: Corrosion Technologies is the only manufacturer in the world with products — CorrosionX being the flagship — qualified under the Advanced Corrosion Preventive Compound military specification; protects outboards, terminals, and powerheads with a self-healing, moisture-blocking film.
- BUILDS A LASTING SHIELD AGAINST RUST AND CORROSION: Forms a moisture-blocking dielectric barrier that molecularly bonds to metal surfaces and subsurfaces; perfect for protecting trailers, marine gear, or tools stored in salt-heavy, humid environments.
- DELIVERS LONG-LASTING, MARINE-GRADE LUBRICATION: Clings to metal like a magnet and resists pressure, friction, and washout; ideal for lubricating locks, hinges, cable pulleys, and marine components exposed to heavy loads, rain, salt spray, tidal moisture, or constant vibration on boats and coastal equipment.
- FREES RUSTED PARTS WITH DEEP PENETRATION: Industrial-strength penetrating oil releases corrosion on frozen bolts, marine fittings, and seized engine parts; penetrates to free up when other products fail in salty, humid, or wet environments on boats, farm tools, or machinery.
- PROTECTS ELECTRONICS AND PREVENTS GALVANIC CORROSION: Safe on circuits, battery terminals, and sensors, CorrosionX forms a dielectric film rated over 39,000 volts that displaces moisture and stops galvanic corrosion between dissimilar metals in harsh environments.
- QUALIFIED BY THE U.S. NAVY FOR ADVANCED MARINE CORROSION PROTECTION: Corrosion Technologies is the only manufacturer in the world with products — CorrosionX being the flagship — qualified under the Advanced Corrosion Preventive Compound military specification; protects outboards, terminals, and powerheads with a self-healing, moisture-blocking film.
- RELENTLESS RUST PROTECTION FOR ANY WEATHER: This self-healing barrier clings and protects metal through rain, seawater, and pressure washing; it won’t drip, wash away, or quit, making it a reliable shield in even the harshest outdoor conditions.
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- IDEAL FOR HEAVY-DUTY ELECTRICAL CONNECTIONS: Designed for larger terminals and connectors like battery posts and grounding lugs, this thick, non-conductive formula provides lasting protection without harming sensitive components, perfect where rugged sealing is needed.
- STAYS FLEXIBLE, NEVER FLAKES OR CRACKS: Forget waxy sprays that dry out and break down, this rust shield flexes with your gear, staying active and bonded even when machinery shifts, vibrates, or takes a beating in the field.
- SMART SCIENCE THAT BLOCKS HIDDEN DAMAGE: Polar Bonding locks onto surfaces to stop corrosion before it starts, preventing electrolysis and galvanic damage in places you can’t even see, from engine bays to salty docksides.
- RELENTLESS RUST PROTECTION FOR ANY WEATHER: This self-healing barrier clings and protects metal through rain, seawater, and pressure washing; it won’t drip, wash away, or quit, making it a reliable shield in even the harshest outdoor conditions.
- BUILT TO PROTECT FOR YEARS, NOT MONTHS: From boat trailers to barn doors, this long-lasting formula keeps working for up to 5 years indoors and 2 years outside; perfect for anyone who needs reliable rust protection.
- IDEAL FOR HEAVY-DUTY ELECTRICAL CONNECTIONS: Designed for larger terminals and connectors like battery posts and grounding lugs, this thick, non-conductive formula provides lasting protection without harming sensitive components, perfect where rugged sealing is needed.
- STAYS FLEXIBLE, NEVER FLAKES OR CRACKS: Forget waxy sprays that dry out and break down, this rust shield flexes with your gear, staying active and bonded even when machinery shifts, vibrates, or takes a beating in the field.
- SMART SCIENCE THAT BLOCKS HIDDEN DAMAGE: Polar Bonding locks onto surfaces to stop corrosion before it starts, preventing electrolysis and galvanic damage in places you can’t even see, from engine bays to salty docksides.
SEOCONTENT-START
Bulletin No.: PIT5750A Published date: 06/10/2021 Preliminary Information PIT5750A Diagnostic Tip – Intermittent Parasitic Battery Draw / Dead Battery / Slow Crank / Radio Stays On or Fades Slowly After RAP Cancel / (LIN Bus) Models Brand: Chevrolet Chevrolet GMC GMC Model: Silverado 1500 (New Model) Silverado Sierra 1500 (New Model) Sierra Model Years: 2019 2020 2019 2020 VIN: from to All All All All All All All All Engine: All All All All Transmissions: All All All All Involved Region or Country North America Condition Some customers may comment of a dead battery. In addition to the dead battery, they may comment on any of the following items: – Slow engine crank – Auto Start/Stop feature inoperative, if equipped – Radio stays on or fading out very slowly after ignition is turned off and RAP has been cancelled – Front or rear heated seats inoperative – DTC’s U1524, U1526, U1555, U155D Cause The cause of these concerns could be the BCM staying awake due to an input from a LIN Bus. It can be diffcult to diagnose these types of cases. Many are misdiagnosed as the BCM being at fault and it is then unnecessarily replaced. There are two known areas that have been found, which can short out LIN Bus circuits 6133 and/or 4115 for the front/rear heated seats (example Document ID 4938095). If this happens, it can cause the BCM to stay awake and draw down the battery. NOTE: Even if a truck is NOT equipped with rear heated seats, these circuits are still in the harness. Correction: Inspect the two following areas: 1. Inspect under the left rear seat (1) for the body harness being pinched where the seat back is attached to the back of cab, as shown below. Call out 2 is connector X370 and this picture was taken from a truck which did not have rear heated seats. In this scenario, LIN Bus circuit 6133 was shorted to the B+ circuit in the harness. 2. Inspect connector X225 for terminal issues/corrosion (3), as shown below. In this scenario, the LIN Bus circuit 4115 was corroded and shorting to other terminals in the connector. If corrosion is found at X225 inspect for a water leak. One known leak location is the A pillar grommet for the door pass through connector not being fully seated. If any issues are found then follow SI Wiring and Connector repair instructions to correct the concern. Warranty Information For wiring repairs covered under warranty, please refer to latest version of bulletin 10-00-89-005 for warranty information on wire/connector repairs. Version History Version 2 Modified 06/10/2020 – Created on. 06/10/2021 – Update step 2 of the correction sections.
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