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 MANUALSBUICK2006RAINIER 4.2 S, AWDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESCOMPUTER/INTEGRATING SYSTEMS
2006 Buick Rainier 4.2 S, AWD
Computer/Integrating Systems
2006 Buick Rainier 4.2 S, AWDSECTION Computer/Integrating Systems
- Schematic Wiring Diagrams
- Component Locator
- Diagnostic Information & Procedures
- Diagnostic Code Index
- Diagnostic Starting Point - Computer/Integrating Systems
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- DTC B1000
- DTC B1004
- DTC B1007
- DTC B1009
- DTC B1397
- DTC B1440
- DTC B1477
- DTC U0100 - U0299
- DTC U1000
- DTC U1001-U1254
- DTC U1300, U1301, or U1305 (5.3L)
- DTC U1300, U1301, or U1305 (4.2L)
- DTC U2100
- DTC U2105-U2199
- Symptoms - Computer/Integrating Systems
- Scan Tool Does Not Power Up
- Scan Tool Does Not Communicate with Class 2 Device (4.2L w/o Immobilizer)
- Scan Tool Does Not Communicate with Class 2 Device (4.2L w/Immobilizer)
- Scan Tool Does Not Communicate with Class 2 Device (5.3L)
- Scan Tool Does Not Communicate with High Speed GMLAN Device
- Power Mode Mismatch
- Retained Accessory Power (RAP) On After Timeout (Except XUV)
- Retained Accessory Power (RAP) On After Timeout (XUV)
- Retained Accessory Power (RAP) Inoperative (Except XUV)
- Retained Accessory Power (RAP) Inoperative (XUV)
- Control Module References
- Data Link References
- Repair Instructions
- Description & 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.