Fuel Pump Relay – Chevy Silverado

[Don Krenz]

Ok, a 1997 Chevy K2500 Silverado.

I am having problems with the truck dying sometimes when driving, and the fuel pump not doing the 2-3 second start when you first turn the key.

I open the under the hood Fuse Relay center and take my finger and move the fuel pump relay and the pump will engage and start. I hear that these fuse blocks get corroded underneath and can cause problems. I am going to replace this fuse block relay center (if I can find one as I cant seem to locate one online) to see if this fixes the problem.

When the truck is running If I pull the relay out the truck dies. When the truck is running, if I take my finger and move the relay just a bit the truck cuts out. So this all goes back to the connections under the relay not being good.

But, I “thought” the relay was just to get the truck started and you could remove the relay once the truck was started and it would continue to run. Am I correct on this? Because once the truck is running if I remove the relay or even move it a tad it dies.

Just making sure there isnt more than one possible issue here

Thanks

Topic

[Richard Kirshy]

Just my understanding of the circuit ..
On initial key, on the computer signals the relay control side to cycle the fuel pump to prime the fuel system and bring it up to operating pressure.
Once running the control side is commanded to remain on which in turn keeps the fuel pump running.

[Don Krenz]

Thanks,

So in essence if I was to remove the relay while the truck was running the truck should die out as the fuel pump would loose power (control side)

So now I need to find this fuse block center and replace it.

[Shaun Flichel]

Yes the relay is activated to keep the pump running. Try to clean the terminals or even slightly bending the relay prongs to help with a better connection. Will get you by for now

[Richard Kirshy]

If it isn’t too corroded..
You might try some electronic contact cleaner spray
Then coat the pins in die-electric grease to help prevent it in the future.

[Don Krenz]

Good ideas on bending the tabs a bit and cleaning up the contacts along with the grease.

I know i watched a video a couple years back when I replaced my fuel pump that showed someone taking apart the fuse block where the relay is located to get to the backside of it but for the life of me I cant find it now…….

[James]

Agree with above, try cleaner and tabs but if that doesn’t help… Pull box and take out block to clean contacts direct. Then reassemble and try. With all above you not out anything but time in case your cant find another block

[Justin]

Sounds to me like the terminal pins inside the fuse block may be spread not allowing proper terminal tension from what your describing. If you can wiggle the relay while it’s running and force a stutter or produce the issue like you stated that’s what I would lean towards.

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