2021 Chevrolet Suburban Technical Service Bulletins

1,366 technical service bulletins (TSBs) are on record for the 2021 Chevrolet Suburban. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10190351Mar 1, 2021Electrical system, Body and structure. This Preliminary information communicates a parts restriction is in place for the Body Control Module on 2020 Cadillac CT4, CT5, Chevrolet Corvette, Suburban, Tahoe and GMC Yukon.
• 10188403Jan 29, 2021Suspension, Transmission and drivetrain. This service bulletin provides technicians with updated information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
• 10188401Jan 29, 2021Equipment, Body and structure. This service bulletin provides information for dealers/technicians on accessory all-weather floor liners and flat mats warped or misshapen.
• 10187235Jan 29, 2021Air bags, Seats, Exterior lighting, Vehicle speed control, Electrical system. Customer Satisfaction Program (Revised Service Procedure). Certain vehicles may have a condition in which the brake system control module (BSCM) may set and latch an internal fault in the module?s on-board diagnostics (OBD) buffer. When the fault is present, no malfunction indicator lamp (MIL) is illuminated and there is no driver information center (DIC) message.
• 10187765Jan 28, 2021Electrical system, Equipment. This service bulletin provides V152 radio software update information to correct customer concerns of various software issues.
• 10187766Jan 25, 2021Equipment. This service bulletin provides V153 radio software update information to correct customer concerns of various software issues.
• 10187745Jan 22, 2021Engine. This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.
• 10187769Jan 21, 2021Electrical system, Engine cooling. This bulletin provides a possible location of a bad connection at the reductant fluid tanks electrical connector.
• 10187232Jan 20, 2021Fuel system, Lane departure, Engine cooling. Service Update. On certain vehicles the clamp may not be properly aligned and positioned on the hose, or the hose is rolled over on the pump port. The improper assembly can quickly develop into a significant leak early in the truck?s life. As the coolant level drops, a Low Coolant Warning or potential for engine overheat with DIC message is possible. Dealers are to inspect for both the vertical and horizontal hose…
• 10187763Jan 15, 2021Equipment, Engine cooling. This technical bulletin provides repair information to correct a customer concern of Possible Crank No Start or Extended Crank with DTC P12A6.
• 10187767Jan 13, 2021Fuel system, Engine cooling, Equipment. This informational bulletin provides a test procedure, for a possible faulty DEF Heater.
• 10187762Jan 13, 2021Electrical system, Body and structure, Equipment. This technical bulletin provides repair information to correct a customer concern of Assist Step Running Boards Inoperable and Not Functioning with Door Operation.
• 10187227Jan 13, 2021Equipment, Back-over prevention (rear camera). Service Update - Certain 2021 vehicles have a condition where, if an over the air (OTA) update was sent to an affected vehicle, the update would fail. Customers will see the update is available, but after accepting and attempting to install, they will receive an update failed message. Dealers will replace the radio.
• 10188411Jan 7, 2021Body and structure, Electrical system. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards the power liftgate inoperative.
• 10187764Jan 4, 2021Forward collision avoidance, Equipment. This technical bulletin provides repair information to correct a customer concern of Long Range Radar setting DTC U3000 49.
• 10187735Dec 23, 2020Electrical system, Air bags. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the airbag lamp illuminated on the driver?s information center (DIC).
• 10187430Dec 23, 2020Electrical system, Equipment. This service bulletin provides V153 radio software update information to correct customer concerns of various software issues.
• 10187429Dec 23, 2020Electrical system, Equipment. This service bulletin provides V152 radio software update information to correct customer concerns of various software issues.
• 10187379Dec 23, 2020Equipment. This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA).
• 10186114Dec 23, 2020Air bags, Electrical system. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the airbag lamp illuminated on the driver?s information center (DIC).
• 10186103Dec 23, 2020Equipment, Electrical system. This service bulletin provides V153 radio software update information to correct customer concerns of various software issues.
• 10186102Dec 23, 2020Equipment, Electrical system. This service bulletin provides V152 radio software update information to correct customer concerns of various software issues.
• 10186065Dec 23, 2020Equipment. This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA).
• 10187736Dec 22, 2020Engine, Electrical system. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Service Engine Soon Lamp being illuminated.
• 10186115Dec 22, 2020Engine, Electrical system. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Service Engine Soon Lamp being illuminated.
• 10187413Dec 18, 2020Engine cooling, Equipment. This technical bulletin provides repair information to correct a customer concern of Possible Crank No Start or Extended Crank with DTC P12A6.
• 10187198Dec 18, 2020Seats. This Preliminary information communicates an issue with the 3rd Row Seat Headrest not returning to the upright position after cycling the seat and to install a headrest repair kit.
• 10187196Dec 18, 2020Electrical system. This Preliminary information communicates a cocnern where a flashing spot can intermittently show up on the radio display while in reverse. The PI advises that engineering is investigating the concern.
• 10186086Dec 18, 2020Engine cooling. This technical bulletin provides repair information to correct a customer concern of Possible Crank No Start or Extended Crank with DTC P12A6.
• 10185747Dec 18, 2020Seats. This Preliminary information communicates an issue with the 3rd Row Seat Headrest not returning to the upright position after cycling the seat and to install a headrest repair kit.
• 10185745Dec 18, 2020Equipment. This Preliminary information communicates a cocnern where a flashing spot can intermittently show up on the radio display while in reverse. The PI advises that engineering is investigating the concern.
• 10207728Dec 17, 2020Exterior lighting, Electrical system. Customer Satisfaction. Additional units added to population.
• 10187619Dec 17, 2020Equipment, Steering. Service Update. A small number of vehicles may have been built with a cracked steering gear ballnut which could result in noise and reduction of steering performance. Dealers are to replace the steering gear.
• 10187428Dec 17, 2020Equipment. This service bulletin provides information to aid a dealer/customer concern of Radio Unwanted Phantom Touch or Non-Responsive to Touch After Cleaning/Disinfecting Radio Display.
• 10187346Dec 17, 2020Steering. Service Update. A small number of vehicles may have been built with a cracked steering gear ballnut which could result in noise and reduction of steering performance. Dealers are to replace the steering gear.
• 10187214Dec 17, 2020Steering, Back-over prevention (rear camera). Service Update. A small number of vehicles may have been built with a cracked steering gear ballnut which could result in noise and reduction of steering performance. Dealers are to replace the steering gear.
• 10187194Dec 17, 2020Transmission and drivetrain. This Preliminary information communicates an issue with the 110 volt power outlets not resetting if overloaded and causing the customer to take the vehicle to the dealership to have it reset. Engineering has released updated cals to correct this concern.
• 10187192Dec 17, 2020Equipment. This Preliminary information communicates an issue with the floor center console cooler being inoperative and engineering working on a root cause.
• 10186101Dec 17, 2020Equipment. This service bulletin provides information to aid a dealer/customer concern of Radio Unwanted Phantom Touch or Non-Responsive to Touch After Cleaning/Disinfecting Radio Display.
• 10186052Dec 17, 2020Steering. Service Update. A small number of vehicles may have been built with a cracked steering gear ballnut which could result in noise and reduction of steering performance. Dealers are to replace the steering gear.
• 10185743Dec 17, 2020Transmission and drivetrain. This Preliminary information communicates an issue with the 110 volt power outlets not resetting if overloaded and causing the customer to take the vehicle to the dealership to have it reset. Engineering has released updated cals to correct this concern.
• 10185741Dec 17, 2020Equipment. This Preliminary information communicates an issue with the floor center console cooler being inoperative and engineering working on a root cause.
• 10187625Dec 16, 2020Engine cooling, Equipment. This informational bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
• 10187618Dec 16, 2020Equipment, Engine cooling. Service Update. Certain vehicles may present a broken engine valve spring. This may cause the engine to run rough, an engine knocking or ticking noise, a check engine light illumination, or a possible vehicle stall. Dealers are to perform the inspection procedure contained within this bulletin.
• 10187387Dec 16, 2020Engine cooling. This technical bulletin provides a service procedure to correct a condition of Ticking Noise from the Engine.
• 10187345Dec 16, 2020Engine cooling. Service Update. Certain vehicles may present a broken engine valve spring. This may cause the engine to run rough, an engine knocking or ticking noise, a check engine light illumination, or a possible vehicle stall. Dealers are to perform the inspection procedure contained within this bulletin.
• 10187213Dec 16, 2020Engine, Equipment. Service Update. Certain vehicles may present a broken engine valve spring. This may cause the engine to run rough, an engine knocking or ticking noise, a check engine light illumination, or a possible vehicle stall. Dealers are to perform the inspection procedure contained within this bulletin.
• 10187189Dec 16, 2020Electrical system. This Preliminary information communicates and issue with the SES MIL on setting DTC's P0201/P0202/P0203/P0204/P0205/P0206/P0216 and instructing dealership to inspect the engine wiring harness for damage.
• 10186104Dec 16, 2020Engine cooling, Equipment. This informational bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
• 10186073Dec 16, 2020Equipment, Engine cooling. This technical bulletin provides a service procedure to correct a condition of Ticking Noise from the Engine.

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