AutoCodes.com | All About OBDII Engine Codes
AutoCodes - GMC - C0299 GMC

C0299 GMC Code - Brake Booster Large Vacuum Leak Detected

- Code Popularity: 18,861 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC C0299 GMC?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Vacuum leak at the brake booster
  • Faulty Brake Booster Vacuum Sensor
  • Brake Booster Vacuum Sensor harness is open or shorted
  • Brake Booster Vacuum Sensor circuit poor electrical connection
  • Faulty Electronic Brake Control Module (EBCM)
⚠ Does your GMC have Safety Recalls? → Check here

How to Fix the DTC C0299 GMC?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for C0299 GMC Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0299 GMC code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

Code C0299 GMC Description

The brake booster vacuum sensor measures the vacuum in the brake booster assembly. The Electronic Brake Control Module (EBCM) supplies a 5 V reference and a low reference circuit to the brake booster vacuum sensor. The vacuum sensor supplies a voltage signal in relation to the pressure in the brake booster to the Electronic Brake Control Module. The Diagnostic Trouble Code (DTC) will be set when the Electronic Brake Control Module detected a too-low vacuum in the brake booster assembly.

OBDII Code C0299 GMC - Brake Booster Large Vacuum Leak Detected - AutoCodes.com
C0299 GMC Code - Brake Booster Large Vacuum Leak Detected

Need More Information on the Code?

Need more information on how to fix the C0299 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0299 GMC code diagnosed by a professional: Find a repair shop in your area

Code C0299 GMC comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the C0299 GMC code? Have you replaced any parts?
Any information is appreciated. Thanks