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.
By type
By component
By trouble code
By topic
Only bulletins with component: Fuel pump are shown. Show all
| 20NA110 | 2022-06-21. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; FUEL SYSTEM, DIESEL:DELIVERY:FUEL PUMP; EQUIPMENT ADAPTIVE/MOBILITY. This service bulletin provides service information for a DEF pump that is unable to build pressure after replacement. |
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| 20NA110 | 2020-11-30. Service bulletin. FUEL SYSTEM, DIESEL; FUEL SYSTEM, DIESEL:DELIVERY:FUEL PUMP. This informational bulletin advises the technician on what to do if the DEF pump has been replaced and perform a leak test to prime the pump. |
| 20NA027 | 2020-04-06. Service bulletin. ENGINE; FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP. This technical bulletin provides a procedure to check the fuel pressure and update the ECM if the pressure is over 58 psi. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.