Sweet Smell from Engine or Cabin While Driving or After Parking
A sweet smell, often described as maple syrup or candy-like, typically indicates a coolant leak. In a 2020 Chevrolet Silverado 1500, this could be from a leaking radiator, heater core, hose, or water pump. Coolant is toxic and can cause engine overheating or interior fogging if the heater core is leaking.
Diagnosis Details
Possible Causes
Coolant leak from radiator, hoses, water pump, or heater core
Heater core leak (if smell is inside cabin)
Air conditioning evaporator drain clogged (less common, but can produce sweet smell from mold)
Related OBD-II Codes
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What You Should Do
Check coolant level in reservoir and radiator (when cool).
Look for puddles under the vehicle, especially near the front.
Inspect hoses, radiator, and water pump for leaks.
If smell is inside the cabin, check for dampness on passenger floorboard (heater core leak).
Do not drive if coolant is low to avoid overheating.
Have a professional pressure test the cooling system.
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
