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.
2008 Chevrolet TrailBlazer 6.0 H, AWDFACTORY OEM SERVICE PROCEDURE
Diagnostic Code Index
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820 | B1735: Driver Seat Front Up Switch Circuit B1740: Driver Seat Front Down Switch Circuit B1745: Driver Seat Rear Up Switch Circuit B1750: Driver Seat Rear Down Switch Circuit B1755: Driver Seat Assembly Forward Switch Circuit B1760: Driver Seat Assembly Rearward Switch Circuit B1815: Driver Seat Recline Forward Switch Circuit B1820: Driver Seat Recline Rearward Switch Circuit |
| DTC B1825, B1850, B1860, B2355, B2365, or B2375 | B1825: Driver Seat Recline Position Sensor Circuit B1850: Driver Seat Lumbar Horizontal Position Sensor Circuit B2355: Driver Seat Front Vertical Position Sensor Circuit B2365: Driver Seat Rear Vertical Position Sensor Circuit B2375: Driver Seat Horizontal Position Sensor Circuit |
| DTC B1830, B1835, B1840 or B1845 | B1830: Driver Seat Lumbar Forward Switch Circuit B1835: Driver Seat Lumbar Rearward Switch Circuit |
Factory Service Tools
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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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