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.DBβ LIVE
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 P0335TESTINGCIRCUIT/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.
- Ignition OFF, disconnect the harness connector at the crankshaft position sensor.
- Ignition OFF and all vehicle systems OFF, it may take 2 minutes for all Vehicle systems to power down. Test for less than 5 Ξ© between low reference circuit terminal 2 of the connector and ground.
- If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 engine control module.
- Ignition ON, test for 4.8-5.2 volts between the 5-volt reference 3 circuit terminal 3 of the connector and ground.
- If less than the specified range, test the 5-volt reference 3 circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the K20 engine control module.
- If greater than the specified range, test the 5-volt reference 3 circuit for a short to voltage. If the circuit tests normal, replace the K20 engine control module.
- Test for 4.8-5.2 volts between the signal circuit terminal 1 of the connector and ground.
- If less than the specified range, test the signal circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the K20 engine control module.
- If greater than the specified range, test the signal circuit for an a short to voltage. If the circuit tests normal, replace the K20 engine control module.
- Ignition OFF, connect a 3A fused jumper wire between signal circuit terminal 1 of the connector and ground.
- Ignition ON, momentarily touch the other end of the fused jumper wire to ground repeatedly while monitoring the scan tool Crankshaft Position Sensor Active Counter parameter. The Crankshaft Position Active counter, should increment.
- If all circuits test normal, test or replace the B26 crankshaft position sensor.
- If the Crankshaft Position Active counter does not increment, replace the K20 engine control module.
NOTE:
Additional DTCs may set when performing this test.
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.