2018 Chevrolet Suburban: Engine failure
Common wear/failure (not a recall)
Symptoms
Owners of the 2018 Suburban report: engine failure. CarComplaints.com lists 1 owner complaints, average mileage 118,000 miles.
NHTSA has 19 owner complaints for the 2018 Suburban in this area. Examples:
- NHTSA complaint ODI #11771060 (filed 10/14/2026): “On august 7, 2026, while driving a rental vehicle in the denver, colorado area with my family, including two young children, the vehicle unexpectedly lost engine power while traveling downhill. the engine shut off, resulting in a significant reduction in brake…”
- NHTSA complaint ODI #11723745 (filed 03/12/2026): “My 2018 lt chevy suburban with 110000 miles has been giving me transmission and motor problems. i took it to chevy vannuys and they took 3 days and did nothing. i saw a recall on line for the same year. explaining about transmission problems. where can i go to…”
Likely causes
Sources do not establish a single root cause; diagnosis is needed. Owner-reported fixes are listed below.
Fix, in plain English
Most common owner-reported solutions on CarComplaints.com: replace engine (1 reports). Check for open recalls and extended warranty coverage with a dealer before paying out of pocket.
DIY difficulty: Pro
Internal engine work (lifters, oil consumption, fuel dilution diagnosis) requires engine teardown or dealer software/tests. (Our assessment.)
Cost
CarComplaints.com owners report a typical repair cost of about $7,000 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
Page last updated .