2021 GMC Acadia Service and Repair Manual

This factory service and repair manual for the 2021 GMC Acadia covers six trims — AT4, Black, Denali, SL, SLE and SLT — and three gasoline engines in the four-door sport utility body. The engines are the naturally aspirated 2.5L DOHC inline-four of 153 cubic inches, the naturally aspirated 3.6L DOHC V6 of 222 cubic inches and the turbocharged 2.0L DOHC inline-four of 122 cubic inches, and the fuel, charge air and engine management procedures are written to keep the three apart.

Engines covered

• 2.5L inline-four (153 cu in) — DOHC, naturally aspirated, gasoline
• 3.6L V6 (222 cu in) — DOHC, naturally aspirated, gasoline
• 2.0L inline-four (122 cu in) — DOHC, turbocharged, gasoline

Body styles covered

• 4-door sport utility

Trims covered

• AT4
• Black
• Denali
• SL
• SLE
• SLT

Known issues on the 2021 Acadia. Two recalls appear on the federal record. Fuel supply lines that were not properly attached and seated can loosen or separate, and the leak that follows raises the risk of a fire. Rearview camera coaxial cable connectors that were crimped badly can make the camera fail or work only intermittently, cutting the driver's view behind the vehicle. Of 147 complaints logged, the electrical system accounts for 28, with service brakes and steering at 16 apiece. Fuel line routing and torque values, camera circuit wiring diagrams and the brake and steering diagnostics are all part of this manual.