OEM GMC Savana 1500 Crankshaft Position Sensor

GMC Savana 1500 Crankshaft Position Sensor Parts and Q&A

• Crankshaft Position Sensor
  12595966
  Q: How to replace the Crankshaft Position Sensor on GMC Savana 1500?

  A:

  The Crankshaft Position Sensor replacement requires that you position the ignition and start switch to off or lock while shutting down all electrical loads to eliminate electrical sparks. Disconnect the negative Battery Cable. Lift the vehicle before removing the Starter assembly. The crankshaft position (CKP) sensor electrical connector needs removal so you can clean the surrounding area to keep engine debris outside. To replace the sensor first remove its retaining fastener followed by removing the ckp sensor itself. To install the ckp sensor follow this process: put sensor in position then install its retaining fastener before tightening it to 25 nm (18 lb ft). Reconnect the ckp sensor electrical connector before returning the Starter into position and lowering the vehicle and reconnecting the negative Battery Cable. Running the crankshaft position system variation learn procedure is required following both sensor removal and replacement.
• Camshaft Position Sensor
  19417445
  Q: How to service and repair the Crankshaft Position Sensor on GMC Savana 1500?

  A:

  Service procedures for crankshaft position sensors start with installing a scan tool to monitor powertrain control module (PCM) diagnostic trouble codes (DTCs). Consult the diagnostic trouble code (DTC) list for additional details if any DTCs appear except P1336. Proceed to close the vehicle's hood, then execute the crankshaft position variation learn procedure from the scan tool while watching for any engine fuel cutoffs. Follow the scan tool's instructions: use the following steps to perform the crankshaft position system variation learn procedure: first, apply the vehicle's parking brake, followed by blocking the drive wheels. Then cycle the ignition between off to on positions before applying brake pedal pressure to start and idle the engine while turning off the A/C and selecting vehicle transmission either park (A/T) or neutral (M/T). During the scan tool inspection, it will check crankshaft position sensor activity (DTC P0335 or P0336 in case of issues) and Camshaft Position Sensor activity (DTC P0341 in case of issues) along with engine coolant temperature measurements after the temperature reaches its threshold. The scan tool enables crankshaft position system variation learn procedures following tool preparation and requires user throttle release when deceleration occurs to allow engine control return to the operator. During the speed increase maneuver, maintain a slow ramp-up to reach the target RPM, then stop the throttle input when the engine reaches the fuel cutoff point. The scan tool will show a message "learn status" during this procedure. Check engine symptoms when a learned status message fails to appear without any newly-set DTCs. Check the DTC list before continuing if your vehicle shows any active fault codes. A thirty-second ignition shutdown follows successful completion of the learn procedure.