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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

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
N2023205102021-02-01. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING; EQUIPMENT. Customer Satisfaction Program. Certain vehicles, equipped with a gas engine, may have a condition in which the printed circuit board inside of the water pump may have been manufactured incorrectly potentially causing a water pump failure. The vehicle coolant system temperature is monitored and will display multiple warnings to the customer as coolant temperatures rise. At a set coolant temperature, the MIL will illuminate, DTC P2B85 will set in the engine control module (ECM), the oil pressure gauge will indicate high oil pressure and reduced torque with notification to the driver of reduced power will occur. If the customer continues to drive after this warning and the coolant temperature continues to rise, a chime will occur, the AC will be disabled and an additional message instructing the driver to idle will illuminate. If the customer continues to drive the vehicle after all previous warnings and the coolant temperature continues to rise a message the engine will shut down could occur, and the engine will be shut down. Dealers are to replace the water pump.
PIT5479D2021-01-25. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician about fluid leaking from the brake caliper piston area found during a service of the vehicle. The substance is actually excess assembly grease from the caliper boot and piston installation. This grease can be cleaned off and the rest of the service completed.
PIP57622021-01-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION. This preliminary information communicates to technicians a possible valve cover causing oil consusmption and the repair.
N2023196602020-12-21. Service bulletin. ENGINE; ELECTRICAL SYSTEM:SOFTWARE. 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.
PIE06012020-12-21. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. 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.
PIE0576A2020-12-21. Service bulletin. ENGINE; EQUIPMENT ADAPTIVE/MOBILITY. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards a start/stop event or during a normal start using the push button on the dash the vehicle would not crank causing it to not start.
100605002I2020-12-21. Service bulletin. EQUIPMENT; 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.
060089031F2020-12-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE. This service bulletin provides information on OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification.
030604017O2020-12-21. Service bulletin. FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. This Informational Bulletin provides information on availability of Diesel Fuel additives.
20NA2122020-12-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; SUSPENSION; ELECTRICAL SYSTEM; ENGINE. This technical bulletin provides repair information to correct a customer concern of IPC Gauges Inoperative or Fluctuate, No Crank, Start then Stall.
20NA0902020-12-21. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM). This informational bulletin provides a way for the technician to identify if the ECM has been modified.
18NA0982020-12-21. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. This informational bulletin provides information for the technicians on where to look on the Duramax engine for coolant leaks.
PIP5752G2020-12-14. Service bulletin. ENGINE; EQUIPMENT; ELECTRICAL SYSTEM. This Preliminary information communicates A Vehicle may have a concern of service engine light, misfire and engine noise with possible of DTC P0300 P0106 P0506, Possible valve spring concern
PIP5748C2020-12-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. 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.
PIP5733F2020-12-14. Service bulletin. ENGINE. This Preliminary information communicates Possible Crank no start or extended crank with DTC p12A6 set current or history. Under Investigation
PIP5759A2020-12-14. Service bulletin. ENGINE. This Preliminary information communicates 6.2L engine restriction, Contact TAC
PIE05902020-12-07. Service bulletin. ENGINE AND ENGINE COOLING. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards check to the engine lamp being illuminated on the drivers information center (DIC).
PIE0572A2020-12-07. Service bulletin. ENGINE AND ENGINE COOLING. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to a no restart after auto-stop event and/or, no crank.
20NA2132020-11-30. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ENGINE AND ENGINE COOLING. This service bulletin provides information on Improved Oil Filter Gasket Design for Spin-On Oil Filters PF63, PF64 and PF48.
20NA2122020-11-30. Service bulletin. ENGINE; ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION. This technical bulletin provides repair information to correct a customer concern of IPC Gauges Inoperative or Fluctuate, No Crank, Start then Stall.
20NA1952020-11-30. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM). This technical bulletin provides a procedure to replace the NOx2 sensor if found the cause of the customers concern.
19NA1872020-11-30. Service bulletin. ENGINE; POWER TRAIN; EQUIPMENT. This bulletin provides additional information on how to graph a cylinder misfire and a possible diagnostic cause.
18NA3612020-11-30. Service bulletin. FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. 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.
18NA1502020-11-30. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, OTHER. This informational bulletin provides information on 6.6L Duramax Possible Oil Leak Path Information.
18NA1032020-11-30. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING:COOLING SYSTEM:PUMP. This service bulletin provides information to correct a customer concern of an in-tank fuel pump whining noise, engine hard to start and/or stalls and Malfunction Indicator Lamp (MIL) is illuminated.

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