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2002 Silverado Fuel Pump Relay Location


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#1 mlkmgr

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Posted 25 September 2009 - 02:26 PM

need to know the location of the fuel pump relay as i just replaced the pump on an '02 1500 and have no power to the pump. anyone that can help quick, i would greatly appreciate it!

#2 txab

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Posted 25 September 2009 - 02:39 PM

Have you looked in the underhood fuse box? Check the diagram on the lid.

Also check your wires and connections. Make sure connections are solid. Check for pinching of wires.

Edited by txab, 25 September 2009 - 02:44 PM.

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#3 spurshot

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Posted 25 September 2009 - 02:44 PM

On an 02, there may also be a panel on the driver side of the dash that is exposed when the driver's door is open. But the panel under the hood is more likely to have the relay and a fuse for the circuit.

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#4 mlkmgr

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Posted 25 September 2009 - 04:01 PM

i swear i looked under the hood 4 times in that fuse panel and did not see it. went back and checked again and low and behold the fuel pump relay is right in my face!!

do i need to prime the new pump or do anything out of the ordinary after replacing the pump. i am doing the fuel filter and pressure regulator as well. thanks again for the replies!

#5 txab

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Posted 25 September 2009 - 04:06 PM

Do you have power to the pump now? Nothing special to be done. Key on and it should pressure up.

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#6 mlkmgr

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Posted 25 September 2009 - 04:33 PM

yeah have power now after swapping relays around, but did not before. saw a "prime" labeled slot next to the fuel pressure relay and just thought perhaps i had to prime the pump. thanks for the help!!

#7 mlkmgr

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Posted 25 September 2009 - 10:45 PM

i installed the pump and the thing doesn't pump. i can hear it whirl but have zero pressure at the fuel rail. any reason there would not be fuel getting to the fuel rail?

i had a friend run a scan with his scantool and he got all kinds of sensor codes. MAP, EVAP, Purge, etc. all below voltage. however the battery was way low from having the dome light on all day. i am currently slow charging the battery now and will disconnect the batt to reset all codes.

#8 txab

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Posted 25 September 2009 - 11:36 PM

Plenty of gas in the tank?

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#9 mlkmgr

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Posted 26 September 2009 - 01:54 AM

just over a fourth of a tank. is that enough? have about 5-6 gallons sitting in gas cans we siphoned off initially when i first started.

i was considering dropping the tank and then found this forum and realized how much easier it would be to lift the bed. should i add the remaining to the truck?

#10 mlkmgr

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Posted 26 September 2009 - 10:01 AM

how do i determine i have the right fuel pump? i know there are codes, but i also looked at online vendors to verify. they list w or w/o robust fuel system, w or w/o evap emissions, etc.

there is a code TCF on the top with two harness connectors, but other than that i am not sure how to determine what pump i have. thanks again...

#11 txab

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Posted 26 September 2009 - 10:27 AM

I believe that's how you identify it. TCF or TCU

TCU w/o evap emissions

TCF with evap emissions

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#12 mlkmgr

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Posted 26 September 2009 - 11:45 AM

thanks for the help! went with a used pump and it worked, however the float did not and the gauge stayed on "E"! decided to just purchase a new one. thanks for the help!! made this job much, much easier!

#13 txab

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Posted 26 September 2009 - 11:50 AM

So have you got it running?

It would have been nice if could have taken pictures as you went along and then you could have done a short write-up to help the next guy that needs to do this. :thumbs:

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#14 mlkmgr

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Posted 26 September 2009 - 12:14 PM

i followed the how-to posted on this site. i did not even think of taking pictures as the process went along. waiting on bro-in law to pick up new pump. bed still off at the moment. pretty straight forward tho.

remove tail gate--no tools required.
disconnect 3 bolts (6.5 mm) securing filler neck--remove gas cap
remove 8 bolts (18mm) securing bed to frame
disconnect tail lights at the rear of the frame
lift bed off truck frame. only two of us needed but YMMV
remove electrical connectors to pump
remove fuel lines from pump
remove retaining ring from around pump
lift pump out allowing gas to slowly drain back into tank
place new pump into openning
reverse removal instructions and done

plan on 1-2 hours. faster if you have impact gun.

#15 txab

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Posted 26 September 2009 - 01:08 PM

i followed the how-to posted on this site. i did not even think of taking pictures as the process went along. waiting on bro-in law to pick up new pump. bed still off at the moment. pretty straight forward tho.

remove tail gate--no tools required.
disconnect 3 bolts (6.5 mm) securing filler neck--remove gas cap
remove 8 bolts (18mm) securing bed to frame
disconnect tail lights at the rear of the frame
lift bed off truck frame. only two of us needed but YMMV
remove electrical connectors to pump
remove fuel lines from pump
remove retaining ring from around pump
lift pump out allowing gas to slowly drain back into tank
place new pump into openning
reverse removal instructions and done

plan on 1-2 hours. faster if you have impact gun.

I did forget about that write up from MountaineerTom. It covers everything pretty well. Picks up are different since you can lift the bed.

Here's MountaineerTom's write up.

http://www.gm-trucks...d-sending-unit/


Here's another post dealing with truck beds:

http://www.gm-trucks...amp;mode=linear

Edited by txab, 26 September 2009 - 01:18 PM.

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