2023 Chevrolet Suburban: Engine complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 87 owner complaints for the 2023 Chevrolet Suburban that list the engine component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11770951 (filed 10/13/2026): “I was driving south on highway 395 with 2 of my friends on our way home from vacation, which is a 2 lane road in the mountains. about 45 miles north of victorville, ca. as i was accelerating, my vehicle all of a sudden dropped adaptive cruise control, the engine light started blinking, traction cont…”
- NHTSA complaint ODI #11770069 (filed 10/09/2026): “Tuesday october 6th, 2026, i dropped my 2 children off at school and was driving on the highway to work through heavy traffic when i had a suddenly loud knocking coming from my car, transmission not wanting to shift properly, high rpm’s for extended periods of time. i was able to safely make it to t…”
- NHTSA complaint ODI #11768833 (filed 10/04/2026): “2023 chevrolet suburban, 6.2l l87, included in recall 25v-274 and nhtsa ea26005. recall service was performed xxx at 20,259 miles; the engine passed inspection and received the 0w-40 oil remedy. i noticed that the oil level was low after the dealer had serviced the engine so i topped it off. at the …”
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
Internal engine work (lifters, oil consumption, fuel dilution diagnosis) requires engine teardown or dealer software/tests. (Our assessment.)
Cost
No sourced cost range for this issue. Get a written quote after diagnosis.
Typical parts (search links, no affiliate codes)
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Sources
Page last updated .