2018 Chevrolet Tahoe: Power Train complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 20 owner complaints for the 2018 Chevrolet Tahoe that list the power train component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11760315 (filed 08/28/2026): “05/15/23 - afm lifter failure - complete top end rebuild under extended warranty purchased when i bought the tahoe - preowned certified. cost $2,000.00 out of pocket ( days chevrolet repaired 86,350 miles) 09/06/23 - transmission failed - warranty paid except $2,000.00 (94,000 miles) 02/02/26 - brok…”
- NHTSA complaint ODI #11753184 (filed 07/27/2026): “Out of nowhere without any warning light all of a sudden couldn’t back up when geared into reverse to reverse. turned the vehicle off and back on, then was able to reverse. left parking lot and was on the road and vehicle started loosing speed, then put into park with hazard lights. when attempting …”
- NHTSA complaint ODI #11747971 (filed 07/02/2026): “Unexpected acceleration…”
Likely causes
These complaints do not establish a single root cause; read the examples above and get a diagnosis.
Fix, in plain English
No single fix is established by these reports. Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer about technical service bulletins (TSBs) or extended warranty coverage, then have the system diagnosed.
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
No sourced cost range for this issue. Get a written quote after diagnosis.
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
Page last updated .