Service bulletins for the 2020 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.
854 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| 20NA235 | 2021-02-22. Service bulletin. EQUIPMENT:APPLIANCE:TV/RADIO/SPEAKERS. This service bulletin provides information to aid a dealer/customer concern of Radio Unwanted Phantom Touch or Non-Responsive to Touch After Cleaning/Disinfecting Radio Display. |
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| 20NA232 | 2021-02-22. Service bulletin. STRUCTURE:BODY:HATCHBACK/LIFTGATE; ELECTRICAL SYSTEM. This service bulletin provides a service procedure to correct a customer concern of Power Liftgate Stops When Opening and/or Will Not Close from Open Position DTC B153F Sets. |
| 20NA199 | 2021-02-22. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This technical bulletin provides programming information for Radio Software Version U150 Update to correct software issues on infotainment systems IOS, IOT or IOU. |
| 20NA159 | 2021-02-22. Service bulletin. TIRES. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only). |
| 18NA306 | 2021-02-22. Service bulletin. EQUIPMENT. This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA). |
| 16NA019 | 2021-02-22. Service bulletin. POWER TRAIN. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares. |
| N202318400 | 2021-02-22. Service bulletin. TRAILER HITCHES. Service Update Bulletin. In certain vehicles, the rear trailer hitch cover may be warped and loose. A rattling noise may occur, and in some cases, the cover may fall off of the vehicle. Dealers are to inspect the rear bumper fascia trailer hitch cover and replace if necessary. |
| N202321840 | 2021-02-16. Service bulletin. AIR BAGS; POWER TRAIN; EXTERIOR LIGHTING. Service Update. On certain vehicles equipped with automatic transmissions, the clutch spring retaining ring may not be fully seated. Vehicles with this condition may set DTC Code P0747 and the MIL light (malfunction indicator light) will illuminate. This typically occurs at low mileage. Dealers will inspect the transmission by following the procedure and if it fails, the transmission will be replaced. |
| N202318400 | 2021-02-16. Service bulletin. BACK OVER PREVENTION; TRAILER HITCHES. Service Update Bulletin. In certain vehicles, the rear trailer hitch cover may be warped and loose. A rattling noise may occur, and in some cases, the cover may fall off of the vehicle. Dealers are to inspect the rear bumper fascia trailer hitch cover and replace if necessary. |
| PIP5730A | 2021-02-16. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Preliminary information communicates additional diagnostic information for DTC's P0016 and P0018. |
| 090604026S | 2021-02-01. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2. |
| 040089015V | 2021-02-01. Service bulletin. EQUIPMENT. This bulletin provides information on Warranty Administration ? Required Operating Procedures - 8 Points (U.S. Only). |
| 010601011L | 2021-02-01. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. This informational bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption. |
| 20NA235 | 2021-02-01. Service bulletin. EQUIPMENT; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This service bulletin provides information to aid a dealer/customer concern of Radio Unwanted Phantom Touch or Non-Responsive to Touch After Cleaning/Disinfecting Radio Display. |
| 20NA232 | 2021-02-01. Service bulletin. STRUCTURE:BODY:HATCHBACK/LIFTGATE:SUPPORT DEVICE/STRUT. This service bulletin provides a service procedure to correct a customer concern of Power Liftgate Stops When Opening and/or Will Not Close from Open Position DTC B153F Sets. |
| 20NA199 | 2021-02-01. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT. This technical bulletin provides programming information for Radio Software Version U150 Update to correct software issues on infotainment systems IOS, IOT or IOU. |
| 20NA159 | 2021-02-01. Service bulletin. TIRES. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only). |
| 18NA306 | 2021-02-01. Service bulletin. EQUIPMENT. This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA). |
| 16NA019 | 2021-02-01. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares. |
| N202318400 | 2021-02-01. Service bulletin. EQUIPMENT; TRAILER HITCHES; EQUIPMENT ADAPTIVE/MOBILITY. Service Update Bulletin. In certain vehicles, the rear trailer hitch cover may be warped and loose. A rattling noise may occur, and in some cases, the cover may fall off of the vehicle. Dealers are to inspect the rear bumper fascia trailer hitch cover and replace if necessary. |
| PIP5730A | 2021-01-25. Service bulletin. EQUIPMENT. This Preliminary information communicates additional diagnostic information for DTC's P0016 and P0018. |
| PI0754D | 2020-12-21. Service bulletin. VISIBILITY:GLASS, SIDE/REAR:CRITICAL FASTENERS; VISIBILITY:GLASS, SIDE/REAR. This PI provides information on Rear and Side Tempered Glass Spots (Quench Marks) and that they are a normal characteristic. |
| 990851001E | 2020-12-21. Service bulletin. EQUIPMENT; STRUCTURE. Thins informational bulletin provides information on Paint-less Dent Repair Process. |
| 060089031F | 2020-12-21. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE. This service bulletin provides information on OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification. |
| 000310002L | 2020-12-21. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; WHEELS. This service bulletin provides information on Chemical Staining, Pitting, Corrosion and/or Spotted Appearance of Chromed Aluminum Wheels. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.