Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2011 Cadillac Escalade EXTFACTORY OEM SERVICE PROCEDURE
Section 871 (Data Communication System)
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic & Routing Diagrams
- Component Locator
- Data Communication Component Views
- Data Communication Connectors
- Auxiliary Body Control Module (XBCM) X1 (Export)
- Auxiliary Body Control Module (XBCM) X2 (Export)
- Body Control Module (BCM) X1
- Body Control Module (BCM) X2
- Body Control Module (BCM) X3
- Body Control Module (BCM) X4
- Body Control Module (BCM) X5
- Body Control Module (BCM) X6
- Body Control Module (BCM) X7
- Data Link Connector (DLC)
- Terminator Resistor
- Diagnostic Information and Procedures
- Diagnostic Code Index
- DTC B1000
- DTC B1001
- DTC U0073
- DTC U0100 - U0299
- DTC U1814
- DTC U2099
- DTC U2100
- DTC U2105-U2199
- Symptoms - Data Communications
- Scan Tool Does Not Power Up
- Scan Tool Does Not Communicate with High Speed GMLAN Device
- Scan Tool Does Not Communicate With Low Speed GMLAN Device
- Data Link References
- Repair Instructions
- Description & Operation
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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