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 CARSECTION 11 (BATTERY, CHARGING SYSTEM AND STARTING SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURES (BATTERY, CHARGING SYSTEM AND STARTING SYSTEM)STARTER SOLENOID DOES NOT CLICKCIRCUIT/SYSTEM VERIFICATION (BATTERY, CHARGING SYSTEM AND STARTING SYSTEM)
2011 GMC Savana Special 4.8 A
Circuit/System Verification (Battery, Charging System And Starting System)
2011 GMC Savana Special 4.8 ASECTION Circuit/System Verification (Battery, Charging System And Starting System)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 GMC Savana Special, 2010 GMC Savana Camper Special, 2010 GMC Savana, 2010 Chevrolet RV Cutaway, and 2010 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON, verify that no crank relay, theft deterrent, or automatic transmission DTCs are set that would cause the ECM not to enable engine starting.
- If DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Ignition ON, observe the scan tool BCM Current Power Mode parameter. Place ignition switch in the crank position, the parameter should display Crank Request.
- If not the specified value, refer to Power Mode Mismatch .
- Transmission range selector in park, verify the scan tool ECM PNP Switch and TCM Park/Neutral parameters display Park/Neutral.
- If the TCM parameter does not indicate Park/Neutral. Refer to Range Selector Displays Incorrect Range for the 4L60/4L65/4L70-E transmission or Transmission Internal Mode Switch Logic for the 6L45/6L50/6L80/6L90 transmission.
- If the ECM Park/Neutral parameter does not indicate Park/Neutral. Refer to ECM Park Switch Circuit Malfunction .
- Transmission range selector in park or neutral, attempt to start the vehicle. The crank relay should click and the engine should begin cranking.
- If the crank relay does not click or the engine does not crank, refer to Crank Relay Circuit Malfunction .
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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.