2020 Chevrolet Suburban: Misfiring fuel pump fuel injection issues struts engine
Common wear/failure (not a recall)
Symptoms
Owners of the 2020 Suburban report: misfiring fuel pump fuel injection issues struts engine. CarComplaints.com lists 1 owner complaints, average mileage 90,000 miles.
NHTSA has 18 owner complaints for the 2020 Suburban in this area. Examples:
- NHTSA complaint ODI #11760183 (filed 08/27/2026): “In 2025, one if the pistons misfired. it was repaired and the same issue occurred a year later causing the cam shaft to break as well. not to mention we had an electrical failure where the dashboard didn’t work and the water pump failed right after it was in f…”
- NHTSA complaint ODI #11759329 (filed 08/25/2026): “Engine had a catastrophic failure and completely shut off while driving down the highway. the engine has completely seized and requires replacement. the vehicle was towed to an independent service shop and the technician diagnosed that the engine needed to be …”
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: none clearly reported. 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 $12,000 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
- CarComplaints.com: Misfiring fuel pump fuel injection issues struts engine (2020 Suburban)
- NHTSA complaints API, 2020 Suburban
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