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
| 20NA136 | 2020-10-26. Service bulletin. POWER TRAIN. This informational bulletin describes/outlines the process for the 9T65 Automatic Transmission Replacement Pilot Program (U.S. Only). |
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| 20NA134 | 2020-10-26. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. This technical bulletin provides repair information to correct a customer concern of seeing SD Card Removed error message displayed in the Driver Information Center (DIC). |
| 20NA073 | 2020-10-26. Service bulletin. SERVICE BRAKES. This technical bulletin provides repair information to correct a customer concern of Loss of Brake Assist, Various Messages Displayed in Driver Information Center (DIC), Brake Pedal Travel and Apply May Feel Different, One or More of the Following DTCs May be Set: P0606 with C0021, C05D2, C0595, C2A3B, C0024, C053D, P25A2. |
| 19NA111 | 2020-10-26. Service bulletin. STRUCTURE. This technical bulletin provides repair information to correct a customer concern of hearing a ticking noise coming from upper B-pillar area. |
| 19NA020 | 2020-10-26. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin provides information on the new oil filter UPF63R to be used on the HFV6 Engines. |
| 18NA306 | 2020-10-26. Service bulletin. EQUIPMENT; STRUCTURE:BODY. This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA) (US dealers only). |
| 18NA115 | 2020-10-26. Service bulletin. ENGINE AND ENGINE COOLING. This Bulletin provides inspection/diagnosis/correction information on a cold start misfire and/or rough idle and DTC P0300 that may also be set. |
| 16NA019 | 2020-10-26. Service bulletin. POWER TRAIN. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares. |
| PIP5755 | 2020-10-19. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates the possibility of a engine oil leak that may occur at the cam carrier gasket T joint area due to improper amount of sealer be applied |
| PIT5720A | 2020-10-19. Service bulletin. VISIBILITY. This Preliminary information communicates that a customer may come to the dealer with a complaint of a hum, drone or pulsing type noise at times. On investigation the dealer may discover that this concern only occurs when the customer is driving with one or both rear windows down or one front window down. The dealer is instructed to advise the customer that if this is occurring with rear windows down to open a front window or the sunroof (if equipped) or if it is occurring with a front window down to open the other front window or the sunroof (if equipped) to alleviate this concern. |
| PIT5754 | 2020-10-19. Service bulletin. EQUIPMENT. This Preliminary information communicates information on radio software anamolies and future radio software updates to correct the concern. |
| PIT5737B | 2020-10-19. Service bulletin. EQUIPMENT. This Preliminary information communicates an XM service concern of no audio at startup until a channel change and directs to contact XM for direct support. |
| PIE0577 | 2020-10-05. Service bulletin. EQUIPMENT; ENGINE. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Check Engine Light being illuminated. |
| 990089019U | 2020-10-05. Service bulletin. EQUIPMENT. This Warranty Administration bulletin provides information on Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program Information. |
| 20NA159 | 2020-09-28. Service bulletin. TIRES. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only). |
| 20NA157 | 2020-09-28. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information on the Transport Mode On Message Being Displayed in the Driver Information Center (DIC) and/or Battery Light is Flashing and the procedures to turn the Transport Mode message ON and OFF. |
| 20NA136 | 2020-09-28. Service bulletin. POWER TRAIN. This informational bulletin describes/outlines the process for the 9T65 Automatic Transmission Replacement Pilot Program (U.S. Only). |
| 18NA099 | 2020-09-28. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin provides information for use on a Product Assistance Claim (PAC), which is formerly known as a Product Allegation Resolution (PAR) claim. |
| 17NA271 | 2020-09-28. Service bulletin. SERVICE BRAKES, HYDRAULIC; WHEELS. This bulletin provides a procedure to clean the back side of the rims and rotors and to correct the customers concern of wheel clicking. |
| PIE0579 | 2020-09-08. 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 the malfunction indicator lamp (MIL) illuminated. |
| PIE0567A | 2020-09-08. Service bulletin. EQUIPMENT. This engineering information (EI) ends the needs for information from the field regarding SD Code messages displayed on the Radio Screen and/or Instrument Cluster - Navigation System Malfunction. |
| 150089002B | 2020-09-08. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; STRUCTURE. This bulletin provides information to dealers regarding transportation damage repair claim submission requirements. |
| 20NA146 | 2020-08-31. Service bulletin. STRUCTURE; SUSPENSION:FRONT:WHEEL BEARING. THis technical bulletin provides a procedure to apply tape to correct the condition of Front End Noise While Driving at Highway Speeds. |
| 17NA271 | 2020-08-31. Service bulletin. EQUIPMENT; WHEELS. This bulletin provides a procedure to clean the back side of the rims and rotors and to correct the customers concern of wheel clicking. |
| 16NA338 | 2020-08-31. Service bulletin. ENGINE; 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 for Canadian Dealers only. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.