Full Size K5 (1969-1991) GMT415 (1992-1994) Tech Discuss any and all full size K5 general tech topics here.

Fuel pump or relay?

  #1  
Old 11-08-2009, 09:08 PM
Beginning Member
Thread Starter
Join Date: Jul 2009
Location: Buffalo, NY
Posts: 23
blrob5 is on a distinguished road
Default Fuel pump or relay?

My truck quit on me in my driveway coming home from work last night. It won't turn over, so I'm thinking it either the relay or the pump. Just wondering which to start with replacing, the relay or the pump, and where is the relay?
 
  #2  
Old 11-08-2009, 09:33 PM
oisinirish's Avatar
Super Member
Join Date: Jan 2009
Location: Austin, TX.
Posts: 1,174
oisinirish is an unknown quantity at this point
Default

When you say "It won't turn over" do you mean that the starter won't turn the engine? or that the engine turns over but doesn't "fire"?
 
  #3  
Old 11-08-2009, 09:44 PM
Beginning Member
Thread Starter
Join Date: Jul 2009
Location: Buffalo, NY
Posts: 23
blrob5 is on a distinguished road
Default

It won't fire. I sprayed starter fluid in the tbi and it seemed to want to fire up, but then stalled out.
 
  #4  
Old 11-08-2009, 10:00 PM
oisinirish's Avatar
Super Member
Join Date: Jan 2009
Location: Austin, TX.
Posts: 1,174
oisinirish is an unknown quantity at this point
Default

I used to have a '94 Yukon. Trying to remember where everything was...
Is there a plastic box under the hood with a bunch of relays in it? Might be under the dash on the the driver's side.

Can you see fuel coming out of the throttle body while someone tries to star the truck? Might try checking the fuel filter as well. Should be on the frame rail somwhere.
 
  #5  
Old 11-08-2009, 10:48 PM
Beginning Member
Thread Starter
Join Date: Jul 2009
Location: Buffalo, NY
Posts: 23
blrob5 is on a distinguished road
Default

I'll check the fuel filter in the morning before I go to the trouble of dropping the tank. I probably will drop it anyway since the gas gauge isn't working, have to replace the sending unit. Thinks for the help, I'll let you know how it turns out.
 
  #6  
Old 11-08-2009, 11:22 PM
oisinirish's Avatar
Super Member
Join Date: Jan 2009
Location: Austin, TX.
Posts: 1,174
oisinirish is an unknown quantity at this point
Default

Originally Posted by blrob5 View Post
I'll check the fuel filter in the morning before I go to the trouble of dropping the tank. I probably will drop it anyway since the gas gauge isn't working, have to replace the sending unit. Thinks for the help, I'll let you know how it turns out.

Ha! yeah it seems in my experience when the gauge started acting up the pump was soon to follow. Please tell me you don't have a full tank of gas>
 
  #7  
Old 11-09-2009, 04:42 PM
Beginning Member
Thread Starter
Join Date: Jul 2009
Location: Buffalo, NY
Posts: 23
blrob5 is on a distinguished road
Default

Didn't have a full tank, in fact, I may have run it empty. There was less than a gallon in it when I dropped it. Just trying to find a good price on the sending unit. I found the sending unit and pump at rock auto for 86.00. For the sending unit, do the hoses that connect to the unit come with it or is that separate? And If they are separate, what are they called and where might I be able to find them?
 

Last edited by blrob5; 11-09-2009 at 09:13 PM.
  #8  
Old 11-09-2009, 10:36 PM
oisinirish's Avatar
Super Member
Join Date: Jan 2009
Location: Austin, TX.
Posts: 1,174
oisinirish is an unknown quantity at this point
Default

I'd do a quick check through the forum about fuel pumps. Many people have had bad luck with anything but AC Delco or....bahhh brain fart.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Tony H
2nd Gen S-series (1995-2005) Tech
1
04-16-2014 08:36 PM
upblazer95
2nd Gen S-series (1995-2005) Tech
4
03-08-2009 07:15 PM
bestes
1st Gen S-series (1983-1994) Tech
2
05-31-2008 03:16 PM
Lckyctch
Engine & Transmission
5
12-30-2007 05:38 PM
mytruck2
2nd Gen S-series (1995-2005) Tech
11
12-13-2006 04:50 PM


Thread Tools
Search this Thread
Quick Reply: Fuel pump or relay?


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.