B3749

DTC B3749, sometimes indicated as B374900 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle body.

DTC Trouble Code Search

Bulletins

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

070139002 - EQUIPMENT:APPLIANCE:AIR CONDITIONER
CHEVROLET: Ei07091 - a/c not cold enough, hvac mode doesn't change, heat not hot enough, B0409, B0419, B0269, B0249, B0408, B0268, B0418, B0248, B0414, B3749, B0424, B3748 (actuator diagnosis) *nj