How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Ron Z. Your Own Question
Ron Z.
Ron Z., - Chevy Tech -
Category: Chevy
Satisfied Customers: 18679
Experience:  18+yrs experience. State Inspector and Chevy Diagnostics
Type Your Chevy Question Here...
Ron Z. is online now
A new question is answered every 9 seconds

Where is the crankshaft sensor in a 1999 chevy lumina

Resolved Question:

Where is the crankshaft sensor in a 1999 chevy lumina
Submitted: 7 years ago.
Category: Chevy
Expert:  Ron Z. replied 7 years ago.


Do you have the 3.1L or the 3.8L engine?



Customer: replied 7 years ago.
Expert:  Ron Z. replied 7 years ago.


There are 2 crankshaft sensors on this engine.



The 24X crankshaft position sensor, secured in a mounting bracket and bolted to the front side of the engine timing chain cover, is partially behind the crankshaft balancer. The 24X Crankshaft Position (CKP) Sensor is used to improve idle spark control at engine speeds up to approximately 1600 RPM .



The 7X crankshaft position sensor provides a signal used by the ignition control module.
The ignition control module also uses the 7X crankshaft position sensor to generate 3X reference pulses which the PCM uses to calculate RPM and crankshaft position.

Ron Z. and other Chevy Specialists are ready to help you