2020 GMC Terrain Service and Repair Manual

This factory service and repair manual for the 2020 GMC Terrain drops to two engines, both turbocharged gasoline inline-fours: the 1.5L at 91 cubic inches and the 2.0L at 122. The four-door sport utility was sold in Denali, SL, SLE and SLT trim. With the diesel gone from the list, the fuel and emissions coverage narrows to spark ignition, while the boost, cooling and driveline sections still split between the two displacements. Procedures, published specifications, torque values, wiring diagrams and diagnostics are arranged system by system.

Engines covered

• 1.5L inline-four (91 cu in) — DOHC, turbocharged, gasoline
• 2.0L inline-four (122 cu in) — DOHC, turbocharged, gasoline

Body styles covered

• 4-door sport utility

Trims covered

• Denali
• SL
• SLE
• SLT

Known issues on the 2020 Terrain. Two recalls are recorded. Bolts can be missing from the start-stop accumulator endcap, which lets transmission oil leak and can progress to a loss of drive; and the four lower child seat anchorage bars in the rear seat can carry so much powder coating that a child seat cannot be attached to them. Owner complaints number 194 and lean heavily toward the service brakes, then the power train and the electrical system, which is where this manual's hydraulic, transmission and circuit diagnostics apply.