Complaint 2176185
2020 GMC ACADIA • ENGINE • incident Jan 31, 2026
Complaint Summary
ENGINE
Owner Narrative
Rear heater line leak detected during evaluation of engine code P01F0 and empty expansion tank was noted. There was never any puddle in my garage prior to the incident, and nothing detected after the fact either. Pictures included demonstrate a leak at the double-crimp near the farthest rear point of the vehicle. The other hose behind the drip photo was also leaking at the crimp under the secondary piece of hose insulation. The design of the system requires replacement of the entire heater line assembly (4 pipes, associated hoses and fittings) traversing the entire length of the vehicle. I was told this is a dealer-only part.
Owner-submitted narrative on file with NHTSA. Complaint narratives are self-reported and have not been verified.