2011 Chevrolet Suburban: Running rough low idle
Common wear/failure (not a recall)
Symptoms
Owners of the 2011 Suburban report: running rough low idle. CarComplaints.com lists 3 owner complaints, average mileage 84,400 miles.
NHTSA has 12 owner complaints for the 2011 Suburban in this area. Examples:
- NHTSA complaint ODI #11364820 (filed 10/17/2020): “Excessive oil consumption. i see this is a common problem on gm vehicles and it affects both my 2011 suburban and 2012 silverado with 5.3 flex fuel engines. the suburban is more noticeable since we use it for long road trips. the truck is mostly city driving. …”
- NHTSA complaint ODI #11306404 (filed 01/31/2020): “Unsafe to drive specially driving over 40 miles…”
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 spark plug/valve cover and clean fuel injectors (2 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 $1,180 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
Page last updated .