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 MANUALSCHEVROLET2006SUBURBAN C1500, 5.3 ZREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1265 (POWER SEAT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B1335CIRCUIT/SYSTEM TESTINGNOTES
2006 Chevrolet Suburban C1500, 5.3 Z
Circuit/System Testing: Notes
2006 Chevrolet Suburban C1500, 5.3 ZSECTION Notes
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
B1335 00 or B1335 0B
- Use a scan tool to clear the current and history diagnostic trouble code.
- Ignition ON, determine which motor set this DTC by operating the following motors one at a time in both directions. Check for the DTC to set between each motor test.
- Driver seat front vertical motor
- Driver seat rear vertical motor
- Driver seat horizontal motor
- Driver seat recline motor
- Driver seat lumbar horizontal motor
- Use a scan tool to clear the current and history diagnostic trouble code.
- Ignition OFF, disconnect the X1 harness connector at the seat or lumbar motor for which the DTC set.
- Ignition ON, operate the motor in both directions then verify that the DTC set.
- If the DTC did not set, test or replace the motor.
- Ignition OFF, disconnect the appropriate X1, X4 harness connector at the MSM.
- Ignition ON, test for 0 volt between each motor control circuit and ground.
- If greater than 0 volt, test the control circuit for a short to voltage.
- Test for infinite resistance between each control circuit and ground.
- If less than infinite resistance, repair the control circuit for a short to ground.
- Test for infinite resistance between the motor control circuits:
- If less than infinite resistance, test for a short between the control circuits.
- If all circuits test normal, test or replace the MSM.
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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.