2014 GMC Sierra 2500HD: Engine went into limp mode when towing
Common wear/failure (not a recall)
Symptoms
Owners of the 2014 Sierra 2500HD report: engine went into limp mode when towing. CarComplaints.com lists 1 owner complaints, average mileage 23,600 miles.
NHTSA has 12 owner complaints for the 2014 Sierra 2500HD in this area. Examples:
- NHTSA complaint ODI #11475195 (filed 07/21/2022): “The contact owns a 2014 gmc sierra 2500. the contact stated that the vehicle failed to start as needed. the contact stated performed a diagnostic test on the vehicle and determined that the engine control module (ecm) needed to be replaced. the vehicle was not…”
- NHTSA complaint ODI #11191374 (filed 03/25/2019): “Tl* the contact owns a 2014 gmc sierra 2500. while operating the vehicle, several unknown warning indicators suddenly illuminated on the instrument panel, including the stabilitrac warning indicator. also while driving at low speeds, the power steering would s…”
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
No sourced cost range: get a written quote after diagnosis.
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto