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.
2006 Chevrolet Suburban K1500, 5.3 ZFACTORY OEM SERVICE PROCEDURE
Diagnostic Code Index
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B1023 | Integral Switch Performance |
| DTC B1544, B1600, or B1605 |
|
| DTC B1580, B1590, B1610, or B1620 |
|
| DTC B1640 or B1645 |
|
| DTC B1722 | Mirror Power Fold Control Circuit |
| DTC B3808 | Rear Door Lock Relay Circuit |
| DTC B3809 | Rear Door Unlock Relay Circuit |
| DTC B3819 | Left Rear Window Up Control Circuit |
| DTC B3820 | Left Rear Window Down Relay Control Circuit |
| DTC B3821 | Left Rear Window Relay Power Circuit |
| DTC B3822 | Right Rear Window Up Control Circuit |
| DTC B3823 | Right Rear Window Down Control Circuit |
| DTC B3824 | Right Rear Window Relay Power Circuit |
| DTC B3825 | Liftgate Lock Signal Circuit |
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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