Jeep Grand Cherokee 2021 — technical service bulletin
Bulletin 11-003-21 · NHTSA communication 10218570 · issued Aug 12, 2021
Technical service bulletin
communication type
Power Train
component
2021
model years
1
vehicle entries
Official summary
Flutter or Rattle Noise From Under the Vehicle - Exhaust Body Heat Shields This bulletin involves replacing all four exhaust heat shields specified in this bulletin. The customer may describe a rattle from underneath the vehicle.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.