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Service bulletins for the 2021 Chevrolet Silverado

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.

1747 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

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

Bulletins, newest first
PIE06422021-08-09. Service bulletin. ENGINE; 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 Service Engine Soon (SES) lamp illuminated and/or Service Emission System Message on the Driver Information Center (DIC).
PIE06232021-08-09. Service bulletin. 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 Malfunction Indicator Lamp illuminated on the Driver Information Center (DIC).
PIE0610B2021-08-09. Service bulletin. ELECTRICAL SYSTEM. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Loss of Power, Instrument Panel Cluster (IPC) Gauges are Inoperative and/or Fluctuate, Multiple Warning Lights on DIC.
PIE0602B2021-08-09. Service bulletin. ENGINE; 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 illuminated on Driver Information Center.
21NA1282021-07-19. Service bulletin. ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY:MANAGEMENT SYSTEM/ENERGY CONTROL MODULE (BMS/BECM). This technical bulletin provides repair information to correct a customer concern of MIL Illuminated- ECM Update for P026C, P20EE, or P11D5.
21NA1212021-07-19. Service bulletin. ELECTRICAL SYSTEM. This technical bulletin provides a procedure to inspect fuses F51DR and/or F52DR in the X51R right instrument panel fuse block when they should not be installed.
21NA0962021-07-19. Service bulletin. ELECTRICAL SYSTEM. This technical bulletin provides a procedure to program the ECM to correct the customers concern.
21NA0772021-07-19. Service bulletin. ELECTRICAL SYSTEM. This informational bulletin provides information for dealers/technicians on Aero Shutter Related Diagnostic Codes.
20NA2182021-07-19. Service bulletin. ELECTRICAL SYSTEM. This service bulletin provides repair information to correct a customer concern of Possible Crank No Start or Extended Crank with DTC P12A6.
19NA0442021-07-19. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This service bulletin provides information on the cold start control system in DI engines to reduce cold start emissions and improve fuel economy.
18NA3612021-07-19. Service bulletin. FUEL SYSTEM, DIESEL; ELECTRICAL SYSTEM. This technical bulletin provides a procedure to flush the cooler lines to validate if there is excessive debris in the fuel system caused by a failed part.
18NA2792021-07-19. Service bulletin. LATCHES/LOCKS/LINKAGES; ELECTRICAL SYSTEM. This service bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking.
21NA1242021-07-06. Service bulletin. ELECTRICAL SYSTEM. This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or P0455 Set.
21NA1212021-07-06. Service bulletin. ELECTRICAL SYSTEM. This technical bulletin provides a procedure to inspect fuses F51DR and/or F52DR in the X51R right instrument panel fuse block when they should not be installed.
N2123353402021-06-14. Service bulletin. ELECTRICAL SYSTEM. Customer Satisfaction Program. Certain vehicles, equipped with a 5.3 L engine, may have a diagnostic calibration in the engine control module (ECM) causing it to stay awake resulting in a parasitic drain on the battery. This could cause diagnostic trouble code (DTC) P0111 and the presence of other low voltage DTC?s. Dealers will update the ECM with the latest calibrations.
PIP58062021-06-14. Service bulletin. ELECTRICAL SYSTEM. This preliminary information bulletin instructs to technicians to use the Picoscope or a make physical inspection to check for a suspected bent target wheel on the camshaft.
PIE06282021-06-07. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Malfunction Indicator Lamp illuminated on Driver Information Center (DIC) with DTCs P3055, P3056 Set.
070842006P2021-06-07. Service bulletin. ELECTRICAL SYSTEM. This service bulletin provides technicians with information on available BCM calibrations to restore bulb outage detection on vehicles produced by a second stage manufacturer (Upfitter), and/or turn signals flash fast after factory box removed.
N2123298512021-05-24. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Customer Satisfaction Program - certain vehicles, equipped with an auxiliary switch bankand control box (RPO UEH), may have a condition where the labels on the auxiliary control box need to be updated. Dealers are to apply the updated labels.
PIP5748F2021-05-17. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates to the technition instructions to replace the particulate matter sensor for a P1488 and to use the special labor operation for tracking purposes.
PIT58362021-05-17. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates and issue with the park assist off message or unwanted/false parking assist alerts and provide diagnostics tip for dealership to inspect the parking assist sensor/bezel mounting in the front and rear bumpers
PIT5677E2021-05-17. Service bulletin. ENGINE; ELECTRICAL SYSTEM. This Preliminary information communicates the following issues and directs dealership to inspect the engine harness for shorting. Some customers may comment on any of the following concerns: - SES MIL - No Start - No Crank - Engine runs rough - Reduced engine power - Erratic speedo - Blown Fuse(s): F46UA, F47UA, F51UA, F78UA, F85UA, F86UA, F87UA, and/or F90UA When checking for DTC's any combination may be found: C15AA P001A P2B00 P2B01 P2B03 P2B96 P001B P003D P0107 P018C P01E5 P01E6 P01E7 P0237 P0340 P0341 P0355 P0365 P037C P03F0 P0521 P0522 P0532 P0616 P077C P07BF P0707 P1101 P112F P146D P159F p16A0 p16A2 P171B P2122 P26E5 P2812 P2814 P2B53 P2C05 P2C08 P2C09 P2C0C P2C0D P2C10 P2C12 P2C15 P2C16 P2C19 P305E P3084 P3089 P308E P3093 P3094 P3095 P3098 P30B0 P30B3 P30CF U0073 U0100 U0101 U0140 U0644 U0672
PIP5775B2021-05-17. Service bulletin. ENGINE; ELECTRICAL SYSTEM. This Preliminary information communicates to dealership technicians that a P11D5 may be cause by a software anomaly, check to see if campaign N212331790 applies, reflash the ECM and release the vehicle.
PIP5788A2021-05-17. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates Some customers may comment that the SES lamp is illuminated or was Illuminated and turned off, with no driveabilty concerns. During inspection Technician may notice DTC P2635. Unknown at this time engineering is working on this concern
21NA0812021-05-10. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This technical bulletin provides a procedure to locate a possible short in the engine wiring harness.

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