2.5L 4-Cylinder Engine Complete Assembly for 2017-2019 GMC Acadia

A quick look at your own vehicle makes sure the right engine shows up:

• Verify the 8th digit of the VIN is 'A'
• Verify the 11th digit of the VIN is 'Z'
• Confirm the vehicle is All-Wheel Drive (AWD) by checking for a rear differential/driveshafts or an AWD badge

What the install really takes — plan and budget with confidence:

Special tools this job needs:

• Engine hoist
• Load leveler
• Subframe support fixture
• GM-specific quick-disconnect tools for high-pressure fuel lines
• Professional-grade scan tool (GM GDS2, Autel MaxiSYS, or Snap-on)

Budget for these consumables at install:

• Engine Oil: 5.0 to 6.0 Quarts of GM Dexos 1 Gen 2 or Gen 3 approved 5W-20 or 0W-20 synthetic engine oil (AWD models require up to 6.0 quarts; verify with dipstick)
• Oil Filter (ACDelco PF64 or equivalent)
• Engine Coolant (GM Dex-Cool 50/50 pre-diluted)
• Spark Plugs (ACDelco 41-121 iridium spark plugs or equivalent)
• Gaskets (Intake manifold, exhaust manifold, and thermostat gaskets)
• Single-use Torque-to-Yield (TTY) fasteners (Crankshaft balancer bolt, high-pressure fuel pump pipe, cylinder head bolts, and camshaft actuator bolts)

What your vehicle’s computers will need after the swap:

What’s involved: Crankshaft Position (CKP) System Variation Relearn

A Crankshaft Position Sensor Relearn must be performed using a GM-compatible diagnostic scan tool once the engine is installed. The vehicle's anti-theft system (immobilizer) may also require a security relearn procedure.

Pro tips for a smooth first start-up — hand them to whoever does the install:

• Torque-to-Yield (TTY) Bolts: Critical fasteners stretch permanently when tightened and must never be reused.
• AWD Transfer Case (PTU) Alignment: Ensure splines are clean and aligned perfectly to prevent damage to internal seals or stripped splines.
• Vacuum Pump Camshaft Drive: Misalignment of the mechanical vacuum pump can snap the end of the camshaft, causing catastrophic cylinder head damage.
• High-Pressure Fuel Pipe: The metal fuel pipe uses a single-use crush seal and must be replaced to prevent high-pressure fuel leaks and fire hazards.
• Fragile Plastic Coolant Fittings: Plastic coolant pipes and heater core fittings become brittle with age and can break easily during removal.

Easy to get right once you know them:

• Ordering a FWD Engine for an AWD Vehicle: The AWD engine has a completely different upper and lower oil pan assembly and unique mounting bosses cast into the block.
• Failing to Perform the Crankshaft Relearn: Skipping the CKP relearn results in rough running, flashing check engine lights, and misfire codes.
• Reusing Single-Use Fasteners: Reusing TTY bolts or the high-pressure fuel pipe leads to mechanical failures or fuel leaks.
• Transferring Bad Cooling Components: Reusing a worn thermostat or water pump from a blown engine can cause immediate overheating and void the warranty.
• Using Incorrect Oil: Failing to use full synthetic oil meeting GM's dexos1 specification can lead to sludge and timing chain tensioner problems.

Not issues with the units on this page — the manufacturer documented these for every engine of this family, wherever you buy one. Handy for your installer: