Sharp Chemical Smell in Cabin
A persistent sharp chemical odor in a 2020 Chevrolet Silverado 1500 likely indicates a coolant leak (sweet smell) or an electrical issue (burning plastic). The constant presence suggests an active leak or overheating component.
Diagnosis Details
Possible Causes
Coolant leak from heater core, radiator, or hoses, often producing a sweet, syrupy chemical smell inside the cabin.
Burning electrical insulation from a shorted wire, failing blower motor resistor, or overheated component, causing a sharp acrid odor.
Refrigerant leak from the A/C system, which can have a sharp chemical smell (though often oily or sweet).
Related OBD-II Codes
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What You Should Do
Check coolant level and look for puddles under the dash or engine bay.
Inspect for signs of coolant on the passenger floor (heater core leak).
If no coolant issue, examine wiring under the dash and near the blower motor for melted insulation or burning smell.
Have a professional diagnose with a coolant pressure test and electrical system inspection.
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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.
