TSB: BRIGHTDROP 3500, 3500HD, 4500, 4500HD, 4500XD, 5500HD, 5500XD, 6500HD, ACADIA, BLAZER, BOLT EUV, BOLT EV, BRIGHTDROP EV600, CAMARO, CANYON, COLORADO, CORVETTE, CT4, CT5, CT6, ENCLAVE, ENCORE, ENCORE GX, ENVISION, ENVISTA, EQUINOX, EQUINOX EV, ESCALADE, ESCALADE ESV, EV600, EXPRESS, EXPRESS 2500, EXPRESS 3500, EXPRESS CUTAWAY VAN, HUMMER EV, IMPALA, LACROSSE, LYRIQ, MALIBU, ONIX, REGAL, REGAL TOURX, SAVANA, SIERRA 1500, SIERRA 2500, SIERRA 3500, SIERRA DENALI, SILVERADO 1500, SILVERADO 2500, SILVERADO 3500, SILVERADO 4500HD, SILVERADO 5500HD, SILVERADO 6500HD, SILVERADO EV, SONIC, SPARK, SUBURBAN, SUBURBAN 1500, TAHOE, TERRAIN, TRAILBLAZER, TRAVERSE, TRAX, XT4, XT5, XT6, XTS, YUKON, YUKON XL, ZEVO 600 (2020–2024)

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.