Service bulletins for the 2020 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.
2120 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| 19NA232 | 2019-11-25. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin provides tips for showing a way to confirm if its a mechanical engine issue or not. |
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| 19NA231 | 2019-11-25. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This informational bulletin informs the technician of a possible low A/C charge in a low milage vehicle from the factory. |
| 19NA228 | 2019-11-25. Service bulletin. ELECTRICAL SYSTEM. This technical provides a procedure to locate, disconnect and re-connect the TCM electrical connector if found the cause of the customers concerns. |
| PIE0532A | 2019-11-25. Service bulletin. VISIBILITY. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to gathering information for the power outside folding mirror with the conditions of having shakes, clicking and/or noisy while folding or loose between the mirror head and mirror base. |
| PIE0515A | 2019-11-25. Service bulletin. ELECTRICAL SYSTEM. This engineering informational bulletin is requesting information for checking for DTCs and the voltage (relative to a ground) on BOTH sides of the 400A starter fuse in the Battery Distribution Engine Compartment Fuse Block. |
| 990420002K | 2019-11-25. Service bulletin. POWER TRAIN. This informational bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operations. |
| 120851002K | 2019-11-25. Service bulletin. EQUIPMENT. This informational bulletin provides technicians and dealership personnel with spray-in bed liner general information and repair procedures. |
| 100605002H | 2019-11-25. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. This informational bulletin provides information on Clean Exhaust Filter See Owners Manual Now or Cleaning Exhaust Filter Keep Driving Until Message is Cleared messages Displayed on DIC, DTC P2463 May Be Set. |
| 100089009C | 2019-11-25. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin provides information on key code security and information on GM key code look up applications. |
| 100089006G | 2019-11-25. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin provides information for dealers how to submit a product information report (PIR) (Canada Only). |
| 010601011K | 2019-11-25. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption. |
| 010089010N | 2019-11-25. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin provides information on comebacks prevention information and using customer concern verification sheets (CCVS). |
| 19NA240 | 2019-11-25. Service bulletin. STEERING. This technical bulletin provides repair information to correct a customer concern of steering wheel oscillation, vibration, shake 50-80 mph. |
| 19NA237 | 2019-11-25. Service bulletin. FUEL SYSTEM, DIESEL. This informational bulletin explains how to identify possible DEF contamination. |
| 18NA361 | 2019-11-25. Service bulletin. ENGINE AND ENGINE COOLING. 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. |
| 18NA306 | 2019-11-25. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA) (US dealers only). |
| 18NA279 | 2019-11-25. Service bulletin. EQUIPMENT:ELECTRICAL. This informational bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking. |
| 16NA372 | 2019-11-25. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin provides information on common diesel engine tick noises and how they are considered part of normal operation and no parts should be replaced for these normal operating conditions. |
| 16NA361 | 2019-11-25. Service bulletin. POWER TRAIN. This informational bulletin explains possible normal condition of a flare from 1st to 2nd, even if the trans had been repaired for the flare and its still noticed. |
| 16NA338 | 2019-11-25. Service bulletin. POWER TRAIN. This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns. |
| N192266751 | 2019-11-12. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ENGINE AND ENGINE COOLING. N192266751 - Service Update (9 VINs moved from N192266750 due to different procedure). On certain vehicles that are equipped with a 6.6L diesel engine, may have one or more of the following conditions exist: 1.The instrument panel cluster may incorrectly display the message ?DEF Low? when a diesel engine fluid (DEF) controller internal fault is detected (DTC P20FF), instead of displaying the proper ?Service DEF System? message. 2.The customer may complain of excessive engine fan noise at a low vehicle speed. 3.Under certain conditions, the diagnostic system may set one of the following DTC?s when there is no problem with a component: (P20EE, P226D, P16F3 and P129F). Dealers are to reprogram the engine control module. |
| N192266750 | 2019-11-12. Service bulletin. ENGINE AND ENGINE COOLING. N192266750 - Service Update. On certain vehicles that are equipped with a 6.6L diesel engine, may have one or more of the following conditions exist: 1.The instrument panel cluster may incorrectly display the message ?DEF Low? when a diesel engine fluid (DEF) controller internal fault is detected (DTC P20FF), instead of displaying the proper ?Service DEF System? message. 2.The customer may complain of excessive engine fan noise at a low vehicle speed. 3.Under certain conditions, the diagnostic system may set one of the following DTC?s when there is no problem with a component: (P20EE, P226D, P16F3 and P129F). Dealers are to reprogram the engine control module. |
| PIP5670A | 2019-11-12. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. This preliminary information communicates the part restriction for the diesel turbocharger and EGR components. Updated to provide instruction on gathering additional data. |
| PIP5668A | 2019-11-12. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates to the dealer technician the coolant control valve is on restriction. |
| PIP5686 | 2019-11-12. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This Preliminary information communicates A vehicle may come into the dealer with a rough idle, lean running concern and/or air leak noise from the PCV system. Upon inspection the technician may find the SES lamp is illuminated and/or DTC?s P0171 and/or P0174 may be in active or stored history. This condition may be caused by an incorrectly installed foul air PCV tube or tube may be damaged |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.