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Old 04-07-2013, 05:31 PM   #1
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Default 2003 Silverado 3500 evap question

Hey everyone.. I just did an engine swap form a 2003 silverado 3500 into my 1977 chevy c30. I've connected the evap canister up just like on the silverado. The fuel pump from the 3500 does not have a fuel pressure sensor so Im wondering how the canister works..

I live in california and need to smog it. When i took it to smog, the evap said ready, but the tech didn't see any tank pressure values.. . (as i don't have a fuel pressure sensor)

can someone please let me know if this is right so i'll some information for when i go back to smog. all help is appreciated..
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Old 04-07-2013, 09:38 PM   #2
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i assume it would be on top or in the side of the tank. it has to have one and alot are not part of the sending unit. if it was me i would look up the part on rock auto or what ever and you could probably find a way to put it in your tank. just have to get a wiring diagram to connect it to the right pins on the pcm
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Old 04-07-2013, 09:45 PM   #3
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Old 04-08-2013, 01:16 AM   #4
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the fuel pump was the airtex e3501m that doesn't have the extra sensor. if it doesnt have the sensor, then does the truck actually need one? that was the curious part... if i can prove this was an option for the 2003 silverado, then i'll be ok.
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Old 04-08-2013, 07:33 AM   #5
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not sure how it checks the evap if it doesnt have a pressure sensor

ACDELCO Part # 16238399
SENSOR,F/TNK PRESS NOT USED ON VEHICLES THAT ARE BOTH RPO FE9 AND ALSO HAVE A GVW OVER 8600 LBS.
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Old 04-21-2013, 07:35 PM   #6
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i called the dealership today and found out that california trucks has to have the FTPS.. :( so im dropping the tank and putting in an airtex e3500m.... CRAP!!!!!
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Old 04-21-2013, 09:13 PM   #7
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Thanks for following up with the fix, sorry you have to get another pump.
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