Service bulletins for the 2018 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.
1345 on file from NHTSA, as of 2026-10-19.
About P0299 on the 2018 GMC Terrain: what the code means, and the bulletins and recalls about the same components.
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By component
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Only bulletins with trouble code: P0299 are shown. Show all
| 18NA020 | 2019-03-18. Service bulletin. ENGINE AND ENGINE COOLING. This technical bulletin provides a procedure to replace the charge air cooler due to moisture getting inside of it and causing a malfunction indicator lamp illuminated with DTC P0300 and/or P0299/P2227. |
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| PIE0452A | 2018-05-21. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. This engineering informational bulletin is requesting information from the field on vehicles that have the condition of Charge Air Cooler Ice Blockage with Malfunction Indicator Lamp Illuminated and DTC P0299 Set After Completing Bulletin 18-NA-020 |
| PIE0452 | 2018-05-21. Service bulletin. ENGINE; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. This engineering informational bulletin is requesting information from the field on vehicles that have the condition of Charge Air Cooler Ice Blockage with Malfunction Indicator Lamp Illuminated and DTC P0299 Set After Completing Bulletin 18-NA-020 |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.