Used GMC Terrain: Inspection checklist

Pick the model year you are going to see. Each sheet lists the checks for the problems owners reported on that year, in the order you would do them at the car. Owners filed 675 complaints across these 8 years; the 2018 drew the most.

Choose a model year

Problems that follow the Terrain from year to year

Each of these is a top-three complaint area in at least two model years. Darker cells mean more complaints that year. Whatever year you are looking at, give these extra time.

Area	2018	2019	2020	2021	2022	2023	2024	2025	Total
Electrical	29	22	19	5	7	5	3	2	92
Transmission	38	46	23	6	7		13	2	135
Brakes	58	40	45	3					146
Fuel system	4		11	2	25	5	2		49

Terrain generations and updates

First years of a new generation and mid-cycle updates are marked. Each year links to its checklist.

Third generation
2025–now
- 2025first year
Second generation
2018–2024
2022 update: Updated front and rear end; Exterior LED lamps; New trim levels including AT4; Discontinuation of low-end SL trim

Mileages where Terrain problems start

From owner reports for each model year, lowest mileage first. Compare these with the odometer of the car you are seeing.

Typical mileage	Problem	Year
3,600–19,000 miles	Fuel pump module stalling	2022
3,800–18,000 miles	Transmission failure and power loss	2024
14,000–30,000 miles	Pitted brake rotors	2018
30,000–48,256 miles	Stalling and reduced engine power	2023
37,000–71,000 miles	Brake vacuum pump failure	2020
37,000–88,000 miles	Backup camera blue screen	2019
42,000–88,000 miles	Fuel pump module stall	2020
45,000–64,500 miles	Front-end shake under acceleration	2021
45,000–86,000 miles	Brake vacuum pump failure	2019
50,000–121,000 miles	Brake vacuum pump failure	2018