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
| PIT5868B | 2023-02-13. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary information communicates an issues will low or poor heater performance on the drivers side. Dealers are to inspect the HVAC temperature door linkage and if ok replace the heater core. |
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| PIT5386H | 2023-02-13. Service bulletin. BACK OVER PREVENTION; ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that are found to have a back-up alarm inoperative during the Pre-Delivery Inspection. On trucks equipped with the Back Up Alarm (RPO 8S3), the alarm will be intentionally left disconnected from the assembly plant. Technician will reroute the harness and plug it in. |
| PIP5843B | 2023-02-13. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates to the dealers information related to a Malfunction Indicator Lamp (MIL) Illuminated During Cold Ambient Temperatures with DTCs P30C3 and/or P30BF P30C7 P30CB Setting. |
| PIT5743C | 2023-02-13. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates diagnostic tips when trying to root cause a SES MIL with DTC's B2B0D and B2B0E. Main cause is aftermarket electrical devices spliced into the ignition main fuses. |
| PIT5161J | 2023-02-13. Service bulletin. FUEL SYSTEM, GASOLINE. This Preliminary Information communication provides information to the technician about vehicles that may have a bump feel or clunk noise at a stop or on launch. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle. The bump clunk issue may be due to fuel movement in the fuel tank when not completely full. The condition is eliminated after completely filling the fuel tank. |
| PIT5819A | 2023-02-13. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. This Preliminary information communicates in temperatures below freezing, it may be noticed that exhaust is only exiting from the right hand exhaust tailpipe. The cause of this condition is a low point in left side tailpipe which results in condensation building up at the low point in the tailpipe. In low temperatures the condensation can freeze and form ice limiting the flow of exhaust out of the left tailpipe. Dealers are to drill a small hole in the left tailpipe to allow condensation to drain. |
| 21-NA-091 | 2023-02-08. Service bulletin. BACK OVER PREVENTION: SENSING SYSTEM: CAMERA; EQUIPMENT; EQUIPMENT:ELECTRICAL:INFOTAINMENT. This service bulletin provides information for customers/dealers/technicians on Normal Camera Display Operation - Flashing Diamond - Spot - or UFO like image on Camera Display. |
| 07-03-16-004E | 2023-02-08. Service bulletin. EQUIPMENT; WHEELS; TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS. This service bulletin provides information for tire pressure monitoring (TPM) system concerns. |
| 00-00-90-002M | 2023-02-08. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; WHEELS; TIRES. This service bulletin provides information for accurate tire pressures that ensure the safe handling and appropriate ride characteristics of GM cars and trucks. |
| 23-NA-002 | 2023-02-08. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This technical bulletin provides repair information to correct a customer concern of Charge Air Cooler (CAC) Icing, Check Engine Lamp Illuminated, Possible P0299, P2227, and/or P0300 DTCs Set. |
| 22-NA-015 | 2023-02-08. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. This informational bulletin provides graphs to help identify possible issues that may cause shaking and shudders and what may be the cause of said issue. |
| 21-NA-138 | 2023-02-08. Service bulletin. SUSPENSION. This service bulletin provides a repair procedure to correct a customer concern of a Squeak, Grind or Clunking Noise from Rear Leaf Springs. |
| 21-NA-095 | 2023-02-08. Service bulletin. ENGINE AND ENGINE COOLING. This technical bulletin provides a procedure to seal the exhaust at the UFSCR and Tailpipe flange. |
| 20-NA-203 | 2023-02-08. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This informational bulletin explains how the regen works for the DEF system and how it works at different levels. |
| 22-NA-232 | 2023-02-08. Service bulletin. POWER TRAIN. This informational bulletin advises the technician of a possibly noise coming from the transmission oil pump. |
| 22-NA-220 | 2023-02-08. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING. This technical bulletin provides a procedure to replace the fuel feed line if found the cause of the failure which set the DTC. |
| 22-NA-187 | 2023-02-07. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. This informational bulletin advises the tech to inspect the transfer case motor electrical connectors for possible damage or corrosion that might be caused by a damage grommet inside the electrical connector. |
| 21-NA-238 | 2023-02-07. Service bulletin. POWER TRAIN. This technical bulletin provides a procedure to inspect the front pump of the transmission for a possible leak. |
| 21-NA-068 | 2023-02-07. Service bulletin. EQUIPMENT. This warranty administration bulletin provides policy information requirements applicable to key fob replacement under the New Vehicle Limited Warranty or under a Replacement Parts Warranty on 2017-2022 and newer model year vehicles with RPO ATH and AVJ. |
| 19-NA-218 | 2023-02-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION; ENGINE AND ENGINE COOLING. This service bulletin provides a service procedure to correct a condition of a Ticking Noise from the Engine. |
| 18-NA-279 | 2023-02-07. Service bulletin. LATCHES/LOCKS/LINKAGES. This service bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking. |
| 02-00-89-002U | 2023-02-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This service bulletin provides information for dealers/technicians on When and How to Submit a Field Product Report (FPR) (U.S. Dealers Only). |
| N222376580 | 2023-02-06. Service bulletin. STEERING:ELECTRIC POWER ASSIST SYSTEM. Service Update - Certain vehicles may have a condition in which the Power Assist Steps reverse while deploying or stowing. Dealers will reprogram the Assist Step Control Module. |
| PIP5894 | 2023-01-30. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). This Preliminary information communicates proper alignment of the transfer case actuator during repair or actuator replacement |
| PIP5540J | 2023-01-30. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:REAR WINDOW:ELECTRICAL HEATING ELEMENT. This Preliminary information communicates to the technician the need to inspect the induction system for potential icing issues in very cold ambient temperatures. To allow the ice to melt so that it can be drained from the related components. That any of the listed DTC's may set with or without poor engine performance. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.