8.1 Crankshaft Position Sensor

tjg79 · September 5, 2009

Scan code indicates a problem with the crankshaft position sensor. I've had two incidents of cranks but fails to start after a short trip, but started ok several hours later.

Is the crankshaft position sensor reasonably easy to replace? Dealer wants $400.00 for the task. I can get the sensor for $62 (shipping included) from GMPartsDirect.

I don't have my GM shop manuals with me at the moment, so any advice from someone who's been there, done that would be appreciated.

Regards to all.

die hard · September 5, 2009

very easy to replace 1 bolt [10mm head size [ and 1 plug is located on the back side of engine betwen the bell hosing and valve cover .. i change mine from underneath truck ..... bolt hole and plug are kinda in the way of each other but the new one has been change and goes in easyer ..may take a little force to remove ...

die hard · September 5, 2009

you may need to clear your codes when finisded cost about 90 bucks for the sensor

Haulin' 8.1 · September 5, 2009

http://www.gm-trucks.com/forums/index.php?showtopic=67012

Vernon

tjg79 · September 6, 2009

Thanks guys. It appears to be a no brainer decision between DIY or Dealer.

Does anyone know if a Genisys EVO is capable of performing the Crankshaft Position Variation Learn Procedure after replacing the crank sensor?

I've been watching eBay for a resonably priced Tech II, but I've had no luck yet.

Other than flash reload/upgrade modual memory, what can the Tech II do that the Genisys EVO can't?

Thanks again.

Levipower · September 8, 2012

It does have the special test capability of doing so. Many times it would also depend on the vehicle, but for example, I look up a 2006 Chevy Silverado with 6.0L, and yes it does the relearn.

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