Check engine light just came on my 2017XT5 Cadillac with 100,100 miles on it. How much will a tuneup cost?

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. The term "tune up" does not really apply to current vehicles. You can use the estimator tool at www.repairpal.com/estimator to find average prices of services near you. It is difficult to make maintenance recommendations without knowing the vehicle's history. As a general rule, spark plugs are due to be replaced by 100,000 miles, and you should check your cabin air and engine air filter; they are probably also due now. The drive belt should also be checked for cracking and as the vehicle is now 8 years old - it'd be a good proactive repair to prevent a future break down. Seek guidance at a shop near you for more help: https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.