2021 Chevrolet Blazer Technical Service Bulletins

814 technical service bulletins (TSBs) are on record for the 2021 Chevrolet Blazer. 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.

• 10187228Jan 14, 2021Air bags, Exterior lighting, Transmission and drivetrain. Service Update. On certain vehicles equipped with automatic transmissions, the clutch spring retaining ring may not be fully seated. Vehicles with this condition may set DTC Code P0747 and the MIL light (malfunction indicator light) will illuminate. This typically occurs at low mileage. Dealers will inspect the transmission by following the procedure and if it fails, the transmission will be replaced.
• 10188417Jan 13, 2021Equipment, 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 AWD Lamp illuminated on the Driver Information Center (DIC) and also having multiple DTCs set.
• 10188416Jan 8, 2021Equipment, 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 AWD Lamp illuminated on the Driver Information Center (DIC) and also having multiple DTCs set.
• 10187205Dec 29, 2020Equipment. This Preliminary information communicates additional diagnostic information for DTC's P0016 and P0018.
• 10185754Dec 29, 2020Equipment. This Preliminary information communicates additional diagnostic information for DTC's P0016 and P0018.
• 10187204Dec 27, 2020Back-over prevention (rear camera). This Preliminary information communicates that a dealer may encounter a vehicle that is making a grinding or growling noise on the first few brake applications after the vehicle has been sitting overnight. The dealer is instructed to perform no repairs at this time as engineering is looking into a repair. The dealer is advised that this PI will be converted into a bulletin with repair instruction when updated parts…
• 10187203Dec 27, 2020Fuel system, Air bags, Engine cooling. This Preliminary information communicates that a customer may bring a vehicle in with an SES light on. If the technician finds a code P2B87 (auxiliary coolant pump underspeed) set in the ECM they are directed to not replace the G17 heater coolant pump because this will not fix the concern. The techician is instructed to clear the code and release the vehicle to the customer with the explanation that an updated…
• 10185753Dec 27, 2020Back-over prevention (rear camera). This Preliminary information communicates that a dealer may encounter a vehicle that is making a grinding or growling noise on the first few brake applications after the vehicle has been sitting overnight. The dealer is instructed to perform no repairs at this time as engineering is looking into a repair. The dealer is advised that this PI will be converted into a bulletin with repair instruction when updated parts…
• 10185752Dec 27, 2020Air bags, Fuel system, Engine cooling. This Preliminary information communicates that a customer may bring a vehicle in with an SES light on. If the technician finds a code P2B87 (auxiliary coolant pump underspeed) set in the ECM they are directed to not replace the G17 heater coolant pump because this will not fix the concern. The techician is instructed to clear the code and release the vehicle to the customer with the explanation that an updated…
• 10187429Dec 23, 2020Equipment, Electrical system. 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).
• 10187202Dec 23, 2020Back-over prevention (rear camera). This Preliminary information communicates A list of software concerns and advises that engineering is working on a resolution. This PI will be changed to a bulletin once the Software is released.
• 10186102Dec 23, 2020Electrical system, Equipment. 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).
• 10185751Dec 23, 2020Back-over prevention (rear camera). This Preliminary information communicates A list of software concerns and advises that engineering is working on a resolution. This PI will be changed to a bulletin once the Software is released.
• 10187201Dec 22, 2020Back-over prevention (rear camera). This Preliminary information communicates A list of software concerns and advises that engineering is working on a resolution. This PI will be changed to a bulletin once the Software is released.
• 10185750Dec 22, 2020Back-over prevention (rear camera). This Preliminary information communicates A list of software concerns and advises that engineering is working on a resolution. This PI will be changed to a bulletin once the Software is released.
• 10187621Dec 21, 2020Equipment, Engine cooling. Service Update. A small number of vehicles may have a coolant inlet pipe that may present an obstructed threaded hole for the coolant temp sensor which could result in the check engine light coming on or a potential coolant leak. Dealers are to replace the coolant inlet pipe and temperature sensor.
• 10187348Dec 21, 2020Engine cooling. Service Update. A small number of vehicles may have a coolant inlet pipe that may present an obstructed threaded hole for the coolant temp sensor which could result in the check engine light coming on or a potential coolant leak. Dealers are to replace the coolant inlet pipe and temperature sensor.
• 10187216Dec 21, 2020Back-over prevention (rear camera), Engine cooling, Air bags. Service Update. A small number of vehicles may have a coolant inlet pipe that may present an obstructed threaded hole for the coolant temp sensor which could result in the check engine light coming on or a potential coolant leak. Dealers are to replace the coolant inlet pipe and temperature sensor.
• 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.
• 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.
• 10187625Dec 16, 2020Equipment, Engine cooling. This informational bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
• 10186104Dec 16, 2020Engine cooling, Equipment. This informational bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
• 10187426Dec 15, 2020Body and structure, Electrical system. This service bulletin provides a service procedure to correct a customer concern of Power Liftgate Stops When Opening and/or Will Not Close from Open Position DTC B153F Sets.
• 10186099Dec 15, 2020Body and structure. This service bulletin provides a service procedure to correct a customer concern of Power Liftgate Stops When Opening and/or Will Not Close from Open Position DTC B153F Sets.
• 10187627Dec 8, 2020Engine cooling, Equipment. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
• 10187168Dec 8, 2020Electrical system. This Preliminary Information communication requests information from the technician about vehicles that may have Bluetooth or phone projection issues. Dealer should request as much information from the customer on the concern as possible and fill in the questionaire.
• 10186106Dec 8, 2020Engine cooling, Equipment. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
• 10185717Dec 8, 2020Equipment. This Preliminary Information communication requests information from the technician about vehicles that may have Bluetooth or phone projection issues. Dealer should request as much information from the customer on the concern as possible and fill in the questionaire.
• 10187394Dec 4, 2020Tires. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).
• 10186080Dec 4, 2020Tires. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).
• 10187626Dec 1, 2020Equipment. This bulletin provides information on Warranty Administration ? Required Operating Procedures - 8 Points (U.S. Only).
• 10187372Dec 1, 2020Transmission and drivetrain. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.
• 10186105Dec 1, 2020Equipment. This bulletin provides information on Warranty Administration ? Required Operating Procedures - 8 Points (U.S. Only).
• 10186058Dec 1, 2020Transmission and drivetrain, Electrical system. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.
• 10184480Nov 25, 2020Equipment. This warranty administration bulletin provide policy information for variable diagnostic time allowances on select labor operations (U.S. Only).
• 10184501Nov 19, 2020Transmission and drivetrain, Engine. This service bulletin provides information on OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification.
• 10184499Nov 12, 2020Equipment, Wheels. This service bulletin provides information on Chemical Staining, Pitting, Corrosion and/or Spotted Appearance of Chromed Aluminum Wheels.
• 10184105Nov 11, 2020Tires, Wheels. This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.
• 10184504Nov 6, 2020Visibility (wipers, defrost, mirrors). This PI provides information on Rear and Side Tempered Glass Spots (Quench Marks) and that they are a normal characteristic.
• 10184503Nov 6, 2020Body and structure, Equipment. Thins informational bulletin provides information on Paint-less Dent Repair Process.
• 10184483Nov 6, 2020Brakes, Engine, Equipment. This technical bulletin provides repair information to correct a customer concern of the Service Engine Soon Lamp illuminated and/or Service Power Brake Assist message displayed, with DTCs P0557 or P0558 Stored.
• 10184098Nov 5, 2020Equipment. This Preliminary information communicates a condition where the radio may display a :connection not availale, please call OnStar agent". This bulletin advises that Engineering is working on a software solution that will prevent the message from displaying when listening to non-SXM sources, but still allow the message to display when a loss of connectivity exists and the user is attempting to play Sirius XM.
• 10183148Oct 30, 2020Body and structure, Equipment. This technical bulletin provides repair information to correct a customer concern of hearing a ticking noise coming from upper B-pillar area.
• 10183198Oct 27, 2020Electrical system. This service bulletin provides information and a service procedure for dealers/technicians on OnStar Over the Air Update for TTY / TDD Operation and Continuous Improvement Changes.
• 10183782Oct 23, 2020Electrical system, Equipment, Transmission and drivetrain. The intent of this technical bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.
• 10183126Oct 23, 2020Engine. This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.
• 10183779Oct 21, 2020Fuel system. This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.
• 10183191Oct 16, 2020Equipment. This service bulletin provides information for dealers/technicians on Normal Characteristic - Wireless Phone Projection Audio Cuts Out Every 10 Seconds on New/Unsold Vehicles.

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