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.
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HOMESERVICE MANUALSGMC2019SIERRA 1500 LIMITED BASE, RWD, GASREPAIR AND DIAGNOSISBODY & FRAMEBODY, CAB CONTROL SYSTEMSSECONDARY AND CONFIGURABLE CUSTOMER CONTROLS
2019 GMC Sierra 1500 Limited Base, RWD, Gas
Secondary And Configurable Customer Controls
2019 GMC Sierra 1500 Limited Base, RWD, GasSECTION Secondary And Configurable Customer Controls
- Wiring Schematic and Routing Diagrams
- Diagnostic Information and Procedures
- DTC B3622
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- Symptoms - Secondary and Configurable Customer Controls
- Steering Wheel Controls Malfunction
- DTC B3622
- Description and Operation
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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.