Service bulletins for the 2020 GMC Terrain
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.
844 on file from NHTSA, as of 2026-10-19.
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By component
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Only bulletins with component: Cooling system are shown. Show all
| 21NA122 | 2021-12-27. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY; EQUIPMENT. This technical bulletin provides a procedure to replace the radiator brackets if found loose and the cause of the customers concern. |
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| 19NA098 | 2020-03-02. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY; EQUIPMENT. This technical bulletin provides a procedure to add flocking to tape the radiator mount sleeves to reduce the knocking noise caused by the excessive movement. |
| PIT5678A | 2019-07-08. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. This Preliminary information communicates an issue with the radiator lower mount that sounds as if it is coming from behind the front wheels. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.