GMC Terrain owners have reported 1 problem related to alternator/generator/regulator (under the electrical system category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of GMC Terrain based on all problems reported for the Terrain.
Emission control has went out twice within 3 months of being fixed. Cam shaft both sides had to be replaced. 4 times with 6 months the fuel light has came on stating the cap needs repaired, even though it was replaced. Alternator, battery has been replaced October 2019, while in another sate. Engine light has been on since I purchased it in Feb. 2019. Electrical shortage because of previous right side damage. Throttle has went out, while driving 65 on highways. Stability control stopped working. Crankshaft was replaced. Exhaust leak. Body control short, jerking while driving, timing warning.
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