Safe to drive; relearn the TPMS sensors to clear it. C0775 is a chassis code that means the tire pressure monitoring (TPMS) sensors have not been learned to the vehicle. On General Motors models it is not a corner-specific hardware fault — it sets because the receiver module has never been taught which sensor lives at each wheel, and the fix is almost always to run the tire pressure sensor learn procedure.
What C0775 means
C0775 is a manufacturer-specific chassis (C) code. On General Motors vehicles (Chevrolet, GMC, Buick, Cadillac) it means the tire-pressure monitoring system has not learned the TPM sensor IDs, so it cannot match each sensor to a wheel position — typically after a tire rotation, a sensor or module replacement, or a relearn that did not complete. See the make-specific page below for the full GM sensor-relearn procedure.
Symptoms
- TPMS warning icon flashes for about a minute at start-up, then stays illuminated after the cluster bulb check
- Driver information center shows a 'service tire monitor' message or dashes instead of live pressure values
- No individual tire pressures are displayed even though all four tires are correctly inflated
- The warning will not clear after driving, because there is no sensor fault to 'go away'
- Fault appears right after a receiver-module replacement, sensor change, or tire service
Common causes
- The tire pressure sensor learn procedure was never performed after service (by far the most common cause)
- A newly replaced RCDLR receiver — it sets C0775 on its first ignition ON cycle until the learn procedure is run
- A relearn was started but not completed — the sequence timed out or not every corner was activated in the allowed window
- One corner cannot be learned because that sensor has a dead battery or has failed, stalling the whole procedure
- Non-original or aftermarket sensors that are not compatible with the GM learn routine, or use of the wrong activation tool
- Radio interference or a weak sensor signal during the learn, so an ID never registers with the receiver
Severity & driving advice
Severity: Low — The vehicle drives normally, but tire pressures are not being monitored until the sensors are learned, so check them by hand meanwhile.
Can I drive? Safe to drive; relearn the TPMS sensors to clear it.
Make & model notes
Chevrolet: On Chevrolet models (Silverado, Tahoe, Traverse and similar) C0775 is 'sensors not learned,' distinct from the C0750/C0755/C0760/C0765 corner codes. It most often appears after a receiver or sensor change; running the relearn in the LF-RF-RR-LR order usually clears it without any parts.
GMC: GMC uses the same GM TPMS logic (verified on the Acadia): a newly replaced RCDLR sets C0775 on its first ignition ON cycle, and the tire pressure sensor learn procedure must be performed. If the code returns after a clean relearn, replace the RCDLR receiver.
FAQ
Does C0775 mean a tire sensor has failed?
Usually not. On GM vehicles C0775 means the sensors have not been learned to the receiver module — the module simply does not have a valid list of which sensor is at which wheel. That is a configuration step, not a broken part, so the normal fix is to run the tire pressure sensor learn procedure rather than replace a sensor. A sensor is only suspect if one corner refuses to respond during the relearn.
How do I fix a C0775 code?
Perform the tire pressure sensor learn procedure. Put the module into relearn mode with the ignition on, then activate each sensor in the GM sequence — left front, right front, right rear, left rear — using a TPMS activation tool held near each valve stem. A horn chirp confirms each corner. Once all four are learned and you cycle the ignition, the code clears on its own.
Why did C0775 appear after I replaced a part?
Because the new part does not yet know the sensor IDs. A newly replaced receiver module (RCDLR) sets C0775 on its very first ignition-on cycle, and swapping sensors or wheels during tire service can leave the module without a valid list too. In every case the vehicle needs the sensor learn procedure run before the system will work again.
Is it safe to drive with a C0775 code?
Yes, in the short term. C0775 only affects tire pressure monitoring, not braking, steering, or the engine, so the vehicle drives normally. The catch is that your tires are not being watched automatically until the sensors are learned, so check all four pressures with a gauge in the meantime and complete the relearn as soon as you can.