p0327
Moderate
GMC · Trucks
Knock Sensor 1 Low Bank 1
Quick Answer
Error code P0327 on your GMC Trucks means: Knock Sensor 1 Low Bank 1. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Locate knock sensor on bank 1
2
Inspect sensor and wiring connector
3
Test knock sensor resistance
4
Check for proper voltage signal
5
Replace knock sensor if testing fails
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Knock sensor
Sensor connector
High-temperature sensor gasket
Dielectric grease
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