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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1568 (DOOR LOCK SYSTEM AND DOOR HANDLES)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B2991CIRCUIT/SYSTEM TESTING
2006 Chevrolet Suburban C2500, 6.0 U
Circuit/System Testing
2006 Chevrolet Suburban C2500, 6.0 USECTION Circuit/System Testing
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect harness connector at the appropriate passenger door latch.
- Test for less than 10 ohms between the ground circuit terminal listed below and ground.
- Passenger door latch terminal 3
- Right rear door latch terminal 3
- Left rear door latch terminal 6
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify the Door Ajar indicator is not illuminated.
- If the indicator is illuminated, test the signal circuit terminal listed below for a short to ground. If the circuit tests normal, replace the BCM.
- Passenger door latch signal circuit terminal 1
- Right rear door latch signal circuit terminal 1
- Left rear door latch signal circuit terminal 4
- If the indicator is illuminated, test the signal circuit terminal listed below for a short to ground. If the circuit tests normal, replace the BCM.
- Install a 3A fused jumper wire between the signal circuit terminal listed below and ground. Verify that the Door Ajar indicator is illuminated.
- Passenger door latch signal circuit terminal 1
- Right rear door latch signal circuit terminal 1
- Left rear door latch signal circuit terminal 4
- If the indicator is not illuminated, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
- If all circuit tests normal, test or replace the passenger door latch.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.