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 MANUALSGMC2011SAVANA SPECIAL 4.8 AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 4 (ENGINE CONTROLS AND FUEL - 6.6L (LGH) - DTC P0016 THROUGH DTC P11DC)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P0315TESTINGCIRCUIT/SYSTEM TESTING
2011 GMC Savana Special 4.8 A
Circuit/System Testing
2011 GMC Savana Special 4.8 ASECTION Circuit/System Testing
WARNING: This page is about a different variant/trim than selected.
NOTE:
You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.
- Perform the Crankshaft Position Reluctor Wheel Learn Procedure. Refer to, Crankshaft Position Reluctor Wheel Learn
.
- If the Crankshaft Position Reluctor Wheel Learn Procedure cannot be performed successfully, inspect for the following conditions:
- Interference in the signal circuit of the crankshaft position sensor
- The ignition switch is left in the ON position, until the battery is discharged
- An ECM power disconnect, with the ignition ON, that may have erased the Crankshaft Position Reluctor Wheel Learn values and set DTC P0315
- Any debris between the crankshaft position sensor and the reluctor wheel
- A damaged or misaligned reluctor wheel
- A damaged crankshaft-Refer to Crankshaft and Bearing Cleaning and Inspection .
- Excessive crankshaft runout
- Any worn crankshaft main bearings
- If the ECM is still unable to complete the learn procedure, replace the ECM.
- Ignition OFF. Verify all vehicle systems are OFF. This may take up to 2 minutes.
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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.