2015 — 2020
6.2L (EcoTec3 6200) - Denali trim
Petrol
Gently accelerate at lower speeds. Pay attention to any shudder or hesitation, as the 8-speed transmission in this generation can occasionally exhibit torque converter judder.
Cycle through the Magnetic Ride Control settings. Ensure you can feel a distinct difference in firmness between modes; a lack of change might suggest the expensive electronic dampers are losing their effectiveness.
Engage the 4WD system while on a loose surface. Verify the transfer case shifts smoothly through its modes without any grinding or delayed engagement, which can be an indicator of internal wear.
Listen carefully while idling for a metallic 'ticking' sound from the engine bay. While some of this is the nature of direct-injection engines, an excessive tick might warrant a closer look at the exhaust manifold gaskets.
Consider a full transmission fluid flush and filter replacement to support long-term smooth shifting.
Inspect the magnetic ride control struts for any signs of fluid leaks or dampness, as these are significant components at this age.
Check the condition of the engine mounts and accessory drive belt tensioners to prevent vibrations and cooling system strain.
Keep a close eye on your engine oil levels between services, as the 6.2L V8 can be quite spirited.
Regularly clean the drain holes around the sunroof and door sills to prevent moisture buildup in the cabin electronics.
Ensure the cooling system is topped up with the correct long-life coolant to protect those complex aluminum engine components.
Inspect the brake rotors and pads regularly; due to the size and weight of the vehicle, these items tend to work hard.
Update your infotainment software at a local specialist if you notice connectivity issues with modern mobile devices.
Estimated repair costs if issues arise
These dampers are incredibly clever, but they are a specialized component. If you notice a 'service suspension' light or a floaty ride in the future, it is worth setting aside some funds for these replacements.
If you notice persistent shuddering, a transmission service or torque converter replacement is a common path to restore that smooth factory feel.
Depending on the car's history and towing usage, these gaskets may eventually perish. It is a labor-intensive job, so it is good practice to keep this in your long-term maintenance buffer.
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Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer