P0335 - GM 4.3 Crank Sensor Shim

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Toad Phillips: You sir are a genius, I was thinking I was going to spend $70 on a new sensor, I just put a piece of old gasket on and it completely fixed the truck. Thank you!

amelio882004: This has to be whats wrong with my Astro. going to pull it tomorrow and see if there are marks on it. should i shim it or just buy a new sensor? Im a touch confused, what is the cover that is mentioned a few times in the comments?

jrnyfannowandthen: my replacement sensor from Oreily's had two shims with it.

Dustin Grant: + wtbm123 Thnxs for all your help. My mechanic ran a diagnostic test and it told him Po325 and Po341 which leads to a new distributor which cost me 155.22. so far truck is running well.

Dustin Grant: +wtbm123 I noticed the sensor was rubbing a bit. Mechanic Is going to look at it tomorrow. Hope he can find the problem. Thanks for all your help. Most appreciated.

Dustin Grant: +wtbm123 I called my Gm dealer and they said they had no such shims or there parts manual did not show one. So I took the sensors To NAPA and explained to the parts guy what i was looking to do. He gave me two thin plastic washers. They where pretty thin plastic washers I installed them. Truck was running fine. Driving to work about a half our i noticed my tach jump a few time. but had no problems until my way home from work about a half our of driving on the highway my truck started to misfire and lose power. The tach was jumping around 2000 RPMs. I had it towed and when I got it home the truck started right up service engine light was out. I am at a total loss . If you have any idea your opinions would be welcome.

Dustin Grant: Thanks for the immediate response. I meant that I was going to use a paper gasket by using a micrometer to get the right size . Just was wondering what size would be sufficient +wtbm123 The cover has been replaced so i think this is my problem.

Dustin Grant: Great video! I think this is my problem, Called the Gm dealer had no record of the shim used. I am going to get a a washer tomorrow but I am not sure what size it should be i Have seen different sizes for the shim online in other videos and foruams. What size do you think I should get? Once again great vid! +wtbm123 I hope this solves my issue.

ghermaine yepez: thank you sir!

Carmin Silva: we have a GM astro van 95 and we look the position for that sensor
can u help me with that please
thank you

Robert Botello: any feedback? did it fix for good

Thomass: Excellent video !   These systems match my 95 4.3 exactly. I don't have the rubbing on my sensor , but its acting like this even after replacing the coil pack , ignition module , plugs wires and cap. So Im going to be replacing my sensor tonight after I run an test if its good. I also learned how to do this today. Thank you !

Mike O: Thanks for the video!!! Had some issues on  the parkway with a miss when id jump on it and the tach was all over the place, my check engine light came on, scanned it, goggled the code and your video came up. Parts store didn't have the shims but had some "fiber washers" . I didn't have the groove  cut in my sensor. I used 1 washer and its all fixed so thank you so much
btw its an 03 GMC Sonoma 4.3

Pat Whaley: I started my truck for work on a cold morning, went inside to use bathroom, come out its barley running RPMs were low. I go to give it gas and it shut off, and it hasn't restarted since then. would this be the most likely problem would you think?

jvw57: 2001 Astro w 4.3L, I changed the sensor and the new one came with 2 shims measuring .020 each.  I did not add the shims as the one I took out was not scratched.. The new one lasted about a week and when I pulled it off, it was scratched. I added both shims and it was magically fixed. Thanks for this video!! 

TwiZtiDTeXas: Okay so you built a new shim for it, and reused the same sensor. What happens if I buy a New Delco sensor for it do I still need to buy a shim for it or no? Thanks for the vid.

KenMildred BarnabyBlais: just a tip about this change of crank censor there is a retainer nut inside casing that hole censor this retainer nut will lossin after time and cause the crank censor to move around and cause the mulit missfire error it just happen to me a little piece of twine to hold it together and some five min epoxy put bolt throu censor first tread retainer nut back on just a few threads then put enough epoxy on it push it back up in place then re tighting nut should work fi for you and could save you 110 dollars on new crank censor hope this helps someone

jamesrussell0823: I had the very same issue.  I pulled the engine to replace the crankshaft, main bearings, rod bearings, and oil pump.  As everyone knows, you must remove the time chain cover.  All was well and then all of a sudden I got the check engine light and the 3000 rpm issues.  I am so glad that I ran across this video!  I fashioned a "shim" from a piece of gasket material that I had, popped the crankshaft position sensor back in and viola, I have my strong running Blazer back.  For those of you with this issue, you can get the shim at AutoZone for about $4.00 if you don't have a way of making one for yourself.  The AZ part number is SU12931.  Hope this helps for other folks!!

omar pinckney: I was always trying to figure out why that was happening thanks!!!

joat rating: We all should take the time and post videos like this to spread our own knowledge. .
P0335 - GM 4.3 crank sensor shim 5 out of 5

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P0335 - GM 4.3 crank sensor shim