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.
By type
By component
By trouble code
By topic
Only bulletins with component: Engine are shown. Show all
| 070601016F | 2019-09-23. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin provides information on Internal Engine Noise or Damage After Oil Filter Replacement. |
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| 000601026M | 2019-09-23. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage. |
| 19NA181 | 2019-09-23. Service bulletin. ENGINE AND ENGINE COOLING. This technical bulletin provides a procedure to locate and repair the engine wiring harness. |
| 16NA380 | 2019-09-23. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. This informational bulletin provides a procedure on how to perform a quick test to check if the DPF is the cause of excessive soot from the tailpipe. |
| 19NA172 | 2019-08-19. Service bulletin. EQUIPMENT; ENGINE. This informational bulletin provides instruction on what may be the cause of the oil leak depending on location and which seal to use to fix it. |
| 090604026Q | 2019-07-29. Service bulletin. ENGINE; EQUIPMENT. This informational bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2. |
| 19NA104 | 2019-07-29. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. This informational bulletin provides information for dealers/technicians and customers on steam/vapor coming from the front grille or radiator area. |
| 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. |
| PIP5657A | 2019-07-08. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates the possibility of a misfire occuring due to a broken center insulator on the spark plug. |
| PIP5657 | 2019-07-08. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates the possibility of a misfire occuring due to a broken center insulator on the spark plug. |
| 19NA098 | 2019-07-01. Service bulletin. STRUCTURE; ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. This technical bulletin provides a procedure to add flocking tape the radiator mount sleeves to reduce the knocking noise caused by the excessive movement. |
| 18NA246 | 2019-07-01. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). This technical bulletin provides a procedure to change the oil if excessive fuel has been found in the oil and the cause of the DTC set. Also replacing the PCV valve in camshaft cover and updating the ECM with latest software. |
| 18NA020 | 2019-07-01. 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. |
| 16NA383 | 2019-07-01. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. This informational bulletin advises of a new fuel injection kit used for decarbonizing the intake valves, and explains how toptier fuels should be used to reduce carbon build up. |
| 16NA380 | 2019-07-01. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. This informational bulletin provides a procedure on how to perform a quick test to check if the DPF is the cause of excessive soot from the tailpipe. |
| 19NA056 | 2019-07-01. Service bulletin. ENGINE; EQUIPMENT. This informational bulletin provides information for dealers/technicians on HVAC Pop-Up May Display 61 Degrees and Have Empty HVAC Setting Icons. |
| 19NA006 | 2019-07-01. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING; EQUIPMENT. This technical bulletin provides a procedure to replace the HVAC case with the redesigned part. |
| PIP5647 | 2019-06-10. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE. This Preliminary information communicates A vehicle may have a concern of running poor and stalling. No trouble codes may be set referencing this condition. Fuel trims around -20% may be observed on both banks. Engine oil level will be found over full and have a fuel odor. It will be found that the Engine oil is diluted with fuel. Small gas engines (SGE) May only have the engine oil level over full and have a fuel odor. It will be found that the Engine oil is diluted with fuel. This concern is caused by marshalling the vehicle around the lot before it is sold and/or short driver cycles. |
| PIP5640 | 2019-06-10. Service bulletin. ENGINE. This Preliminary Information communication provides information to the technician to not remove the torque converter bolts and start the engine as this may cause damage to the torque converter of the crankshaft on vehicles equipped with an automatic transmission. |
| PIP5226C | 2019-06-10. Service bulletin. EQUIPMENT; ENGINE. This Preliminary Information communication provides information to the technician about finding needle bearings during an oil change. Technician will gain access to the roller rockers to inspect them. Only replace the roller rocker that is missing needle bearings. Be sure to clean the oil drains to retrieve the needle bearings. Each roller rocker has 66 bearings. |
| PIT5678 | 2019-06-03. Service bulletin. ENGINE; STRUCTURE. This Preliminary information communicates an issue with the radiator lower mount that sounds as if it is coming from behind the front wheels. |
| PIP5569A | 2019-06-03. Service bulletin. ENGINE; FUEL SYSTEM, GASOLINE. This Preliminary information communicates to the dealer an issue where the vehicle's engine may crank over unprompted and not start afterward. This is the result of hooking up the Active Fuel Injector Tool incorrectly on vehicles equipped with a direct fuel injection system. This Preliminary information instructs the dealer of a repair kit they received that will prevent this issue when installed correctly. |
| PIP5483C | 2019-06-03. Service bulletin. ENGINE. This Preliminary information communicates noises are considered to be normal operating characteristics of the vehicle when shut off. It will not impact the designed performance or reliability of the vehicle. |
| PIP4670F | 2019-06-03. Service bulletin. ENGINE; ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about a no start or another concern after swapping an Engine Control Module or other modules from one vehicle to another. The Global Architecture electrical system associated with these vehicles does not allow controller swaps between vehicles. |
| 19NA080 | 2019-05-28. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). This informational bulletin provides information to the tech to discard the PCV drain tube when working on the lower area of the engine. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.