2018 Chevrolet Suburban: Transmission slipping
Common wear/failure (not a recall)
Symptoms
Owners of the 2018 Suburban report: transmission slipping. CarComplaints.com lists 1 owner complaints, average mileage 143,000 miles.
NHTSA has 19 owner complaints for the 2018 Suburban in this area. Examples:
- NHTSA complaint ODI #11770116 (filed 10/09/2026): “My 2018 chevrolet suburban is experiencing transmission problems that raise serious concerns about the reliability and potential safety of general motors transmissions used in trucks and suvs from this period. when i contacted an independent transmission repa…”
- NHTSA complaint ODI #11769978 (filed 10/08/2026): “My suburban shut off 5 times while turning. very unsafe given i have 4 children and it could have been while we were driving on the freeway, which could have been fatal.…”
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 transmission (1 reports). Check for open recalls and extended warranty coverage with a dealer before paying out of pocket.
DIY difficulty: Pro
Diagnosis needs a scan tool; repair or replacement needs a lift, transmission jack and the manufacturer's fluid fill/relearn procedure. (Our assessment.)
Cost
CarComplaints.com owners report a typical repair cost of about $8,000 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
Page last updated .