Auxiliary Heater System Malfunction
Table of contents
B048E GMC Possible Causes
- Faulty Electrical Auxiliary Heater
- Electrical Auxiliary Heater harness is open or shorted
- Electrical Auxiliary Heater circuit poor electrical connection
- Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module
How do I fix code B048E GMC?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the B048E GMC code
The cost of diagnosing the B048E GMC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B048E GMC Description
The Heating, Ventilation, and Air Conditioning (HVAC) Control Module sends a Pulse Width Modulation (PWM) signal to the electrical auxiliary heater, if the interior temperature is too low and additional heat is requested. The request signal from the HVAC control module, battery positive, ignition and ground circuits enable the electrical auxiliary heater to operate. Through the signal circuit the electrical auxiliary heater sends via a PWM signal the current status to the HVAC control module.