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Service bulletins for the 2019 Chevrolet Blazer

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

848 on file from NHTSA, as of 2026-10-19.

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By component

By trouble code

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
PIT57122019-10-15. Service bulletin. STRUCTURE; ELECTRICAL SYSTEM. This Preliminary information communicates information regarding illuminated sill plates that will not light up.
PIP4670H2019-10-15. Service bulletin. ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about a no start or another concern after swapping an Engine Control Module or other modules from one vehicle to another. The Global Architecture electrical system associated with these vehicles does not allow controller swaps between vehicles.
PI0592E2019-09-23. Service bulletin. ELECTRICAL SYSTEM. This preliminary information bulletin provides information om Service Programming System (SPS) Error Codes E4398, E4399, E4403, M4404, M4413, E4414, E4423, E4491 or E6961).
PIT57002019-09-16. Service bulletin. FORWARD COLLISION AVOIDANCE: SENSING SYSTEM: CAMERA; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. This Preliminary information communicates that a vehicle may come to the dealer with a "service front camera" message. The technician is instructed to use the data bus tool to determine if the front view camera module and active safety module are both communicating on the low speed bus. If the technician determines that one of the modules is not communicating on low speed the tech is instructed of areas to inspect the low speed communication line, 5060 for possible opens and repair them per SI.
19NA1602019-08-26. Service bulletin. ELECTRICAL SYSTEM:HORN; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This technical bulletin provides repair information to correct a customer concern of Intermittent or Continuous Horn Blowing, Horn Activation Sensitive to the Touch.
100845001G2019-07-29. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM. This bulletin provides information for electrical ground repairs using new General Motors replacement fasteners with conductive finish.
060847001O2019-07-29. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM. This bulletin explains the labor operation numbers used for submitting warranty claims for module reprogramming and not when replacing a module.
19NA1232019-07-29. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM; EQUIPMENT. This technical bulletin provides repair information to correct a customer concern of the rear closure hands free lamp logo projection distorted.
PIC6365A2019-07-08. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This Preliminary information communicates information to dealers advising certain Over the air updates and USB updates have been temporarily suspended.
PIT56842019-06-10. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates information for terminal concerns at X203
PIT56792019-06-10. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates that a vehicle may be encountered with a "service park assist system" message or a rear lift gate that will not open passively. The technician is instructed to inspect connector X400 for evidence of water intrusion. The technician is instructed to replace the harness and terminals in the body side connector as needed if water intrusion or corrosion is found.
PIT56702019-06-03. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates that a vehicle may come to the dealer with a "service driver assist system" message. The technician may find codes B101D and or B390C. If this condition is found the technician is instructed to check the Long Range Radar Module (LRRM) bracket for being loose. Tech is instructed to attempt to move the LRRM by hand and if movement is felt he is instructed to adjust the LRRM mounting bracket, properly tighten the bolts and perform a LRRM learn procedure.
19NA0762019-05-28. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; BACK OVER PREVENTION: SENSING SYSTEM: CAMERA; EQUIPMENT ADAPTIVE/MOBILITY. This technical bulletin provides repair information to correct a customer concern of Blue Screen and Service Rear Vision System Message on Radio Display.
030603004Y2019-05-20. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. This warranty administration bulletin provides policy information on the requirements for battery testing and warranty replacements.
N1922145902019-05-20. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Service Update. Certain vehicles may not have the snow/ice mode calibration enabled. This missing calibration results in the selection of snow/ice mode (knob selector) not having a change in the accelerator pedal response. Reprogram the engine control module (ECM).
100845001F2019-04-22. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This bulletin provides information for electrical ground repairs using new replacement fasteners with "conductive finish".
090089002Q2019-04-22. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. This informational bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before sold (prepping) to the customer.
070849020P2019-04-22. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin provides information for the IPC odometer programming method quick reference guide.
030846004V2019-04-22. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin provides information on OnStar® VCIM is currently restricted parts. By working closely with our dealers and technicians, through the part restriction process, the General Motors team will gain a better understanding of any field concerns that may develop.
PIT5655A2019-04-08. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This Preliminary information communicates that a customer may complain of when a Bluetooth call is received the ringing will be continuous for the rest of the drive cycle . It may be noted that this only seems to occur when using an Android device on OS 9.0. This may be caused by a software concern in the phone. The dealer is instructed that the phone manufacturer is working on a software update to resolve the concern.
110849001Y2019-03-25. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. This technical bulletin provides information on Transport Mode On Message Displayed in Driver Information Center (DIC) and/or Battery Light is Flashing and the procedures to turn the Transport Mode message On and Off.
16NA3422019-03-25. Service bulletin. VISIBILITY:REARVIEW MIRRORS/DEVICES; ELECTRICAL SYSTEM. This technical bulletin provides a procedure to check the rearview mirror coax connector for looseness by disconnecting and reconnecting the electrical connector and to correct the customers concern for the rearview mirror video screen displaying blue.
18NA3762019-03-25. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides service procedure information for dealers/technicians on Radio Software Version V509 Over-the-Air Update.
060847001N2019-03-25. Service bulletin. ELECTRICAL SYSTEM. This bulletin explains the labor operation numbers used for submitting warranty claims for module reprogramming and not when replacing a module.
18NA3762019-03-25. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. This bulletin provides service procedure information for dealers/technicians on Radio Software Version V509 Over-the-Air Update.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.