2019 GMC Sierra 2500HD: A/C shuts off on idle at high temps
Common wear/failure (not a recall)
Symptoms
Owners of the 2019 Sierra 2500HD report: a/c shuts off on idle at high temps. CarComplaints.com lists 1 owner complaints, average mileage 1,000 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: none clearly reported. Check for open recalls and extended warranty coverage with a dealer before paying out of pocket.
DIY difficulty: Pro
Opening the A/C system requires refrigerant recovery equipment, and US EPA Section 609 certification is required to service vehicle A/C for compensation. (Our assessment.)
Cost
No sourced cost range: get a written quote after diagnosis.
Typical parts (search links, no affiliate codes)
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