2022 GMC TERRAIN

Typical onset: 30,000-80,000 mi

Symptoms: Sudden loud knocking or rattling from engine bay, Metal shavings in oil during change, Check engine light with misfire codes, Complete loss of power, engine seizes, Oil consumption between changes (early warning sign)

Fix: This is a complete engine replacement job in most cases—connecting rods break, punch through block, or pistons crack. Short block replacement takes 18-24 hours if you can source one; most get reman or used engines. Root cause appears to be inadequate oil delivery to rod bearings under certain conditions combined with defective piston ring design causing carbon buildup.

Estimated cost: $6,500-9,500

Typical onset: 40,000-90,000 mi

Symptoms: Transmission fluid puddles under vehicle (red/pink fluid), Burnt transmission fluid smell, Harsh shifting or slipping after fluid level drops, Low transmission fluid warning light

Fix: The cooler lines that run to the radiator corrode or crack at the crimped fittings. Requires replacement of cooler lines and often the cooler itself if contaminated. 2-3 hours labor, plus full fluid flush. GM issued TSB for some VINs but not a recall.

Estimated cost: $450-800

Typical onset: 50,000-100,000 mi

Symptoms: Clunking when shifting from park to drive/reverse, Excessive engine movement visible from driver seat during acceleration, Vibration through chassis at idle, Thud when letting off throttle

Fix: The upper torque strut mount (engine/trans mount) rubber deteriorates quickly on these. Simple replacement job, 1-1.5 hours. Use OEM or quality aftermarket—cheap ones fail in 20k miles.

Estimated cost: $250-450

Typical onset: 60,000-110,000 mi

Symptoms: Rough idle, misfires on multiple cylinders, Hard starting, extended cranking, Loss of power, hesitation under load, P0087 fuel pressure too low codes

Fix: The high-pressure fuel system is sensitive to contamination. Fuel filter clogs prematurely or injectors gum up. Often requires fuel filter, injector cleaning or replacement, and occasionally high-pressure fuel pump. 3-5 hours depending on how many injectors need replacement.

Estimated cost: $800-2,200

Typical onset: 70,000-120,000 mi

Symptoms: White smoke from exhaust, Coolant loss with no visible leaks, Milky oil on dipstick or oil cap, Overheating, bubbling in coolant reservoir, Sweet smell from exhaust

Fix: The 1.5L has thin casting in the block and head, making it prone to gasket failure and warpage. Head gasket job requires 10-14 hours, head machining usually needed, and you're gambling whether the block is warped too. Many techs recommend checking for cracks with dye test during teardown.

Estimated cost: $2,800-4,500

Typical onset: 60,000-100,000 mi

Symptoms: Rough idle especially when cold, Hesitation on acceleration, Reduced fuel economy, Misfires at startup, Engine runs rough until warmed up

Fix: Direct injection means no fuel washing the intake valves—carbon cakes on hard. Walnut blasting the intake valves is the proper fix, 4-6 hours with intake manifold removal. Some shops use chemical treatments but results are temporary.

Estimated cost: $500-900