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 MANUALSCHEVROLET2011TAHOE BASE, 5.3 0, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1740 (AUTOMATIC TRANSMISSION - ALLISON - DTC P0880 TO DTC P2771)DTC P0972-P0974CIRCUIT/SYSTEM TESTING
2011 Chevrolet Tahoe Base, 5.3 0, 4WD
Circuit/System Testing
2011 Chevrolet Tahoe Base, 5.3 0, 4WDSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the X175 harness connector at the transmission.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal N and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the TCM.
- Connect a test lamp between the control circuit terminal A and the B+ circuit terminal N.
- Command the Shift Solenoid 1 ON and OFF with a scan tool and verify the Shift Solenoid 1 parameter changes from On to Off. The test lamp should turn ON and OFF when changing between the commanded states.
- If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the TCM.
- If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the TCM.
- Ignition OFF, install the X175 harness connector.
- Remove the transmission oil pan. Refer to Oil Pan Replacement .
- Disconnect the SS1 solenoid connector.
- Connect a test lamp between terminals A and B of the internal harness.
- Ignition ON, engine OFF, command the Shift Solenoid 1 ON and OFF with a scan tool and verify the Shift Solenoid 1 parameter changes from On to Off. The test lamp should turn ON and OFF when changing between the commanded states.
- If not the expected results, replace the transmission internal wiring harness. Refer to Wiring Harness Replacement .
- If all circuits Test normal, test or replace the SS1 solenoid.
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.