GMC Sierra
B1001
The HVAC system in a GMC Sierra T1XX (2019-Present) is displaying a diagnostic trouble code (DTC) B1001, indicating a malfunction related to the HVAC control module or ambient temperature sensor.
2 SolutionsB-CodeBody
B
Error Code Type
Body
Components
2 affected
HVACElectrical
Symptoms
10 common
- •HVAC control panel not responding to inputs
- •Inconsistent or no airflow from vents
- •Incorrect temperature readings on the display
- +7 more
Most Affected Generations
1 generation
T1XX
2
Top Affected Components
2 components
HVAC
1
Electrical
1
Severity Levels
1 level
medium
2
Quick Facts
2
Total Solutions
2
Affected Components
10
Common Symptoms
1
Generations
All Solutions
Showing 2 of 2 solutions for error code B1001 across all generations.