P0106 on a GMC: Causes, Fixes & Repair Cost
🟠 Moderate severity · drivable
Safe to drive, but expect rough idle and reduced power until the vacuum leak or MAP sensor issue is corrected.
What P0106 means on a GMC
On a GMC, P0106 means the engine computer sees a manifold absolute pressure (MAP) sensor signal that is out of the expected range for engine speed and load. The MAP sensor measures intake vacuum to help the computer figure out engine load. A vacuum leak or a weak sensor is the usual cause on GMC trucks and SUVs.
Is P0106 common on GMCs?
P0106 is seen on higher-mileage GMC vehicles such as the Sierra, Yukon, and Acadia. Cracking vacuum lines, intake gasket leaks, and an aging MAP sensor are the typical causes. It is a common sensor-level fault rather than a sign of engine damage.
Commonly reported on: Sierra, Yukon, Acadia, Terrain.
Symptoms
- Check engine light is on
- Rough idle
- Poor fuel economy
- Reduced power or hesitation when accelerating
Common causes
- most common: Vacuum leak at an intake hose or gasket
- common: Faulty or failing MAP sensor
- common: Cracked vacuum line to the sensor
- less common: Loose or corroded sensor connector or wiring
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Find and fix the vacuum leak | Yes | $10–60 |
| Replace the MAP sensor | Yes | $50–160 |
| Repair the connector or wiring | Mechanic | $60–180 |
Frequently asked questions
Other common GMC codes
P0106 on other brands
Looking for the full (non-brand-specific) guide? See the P0106 code page →
Browse all GMC codes: GMC hub →
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.