Fuel pump relay is missing and still runs

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dstinsman56

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May 29, 2013
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Hi guys, new here. I have been trolling over the last couple of years but have never had to make a post. I purchased a 08 Yukon Denali from a GMC dealer about a year ago and have been pleased with it. I have never had anyone work on it but myself. I have been seeing if I could get the elusive miss at idle to go away and was in the process of doing a top end cleaning when I ran into this problem. I popped the fuse panel cover to remove the fuel pump relay or fuse. What I found was an empty spot in the panel for a fuel pump relay and the fuse calls for a 20 amp in spot number 20. I found a five amp fuse instead. I tried pulling that 5 amp out and it still ran. I did end up disabling the fuel pump system but am very interested if anyone else has ran into this issue or maybe a modification or upgrade has been done to the system.
 

mklucas53

TYF Newbie
Joined
Oct 12, 2023
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Hi guys, new here. I have been trolling over the last couple of years but have never had to make a post. I purchased a 08 Yukon Denali from a GMC dealer about a year ago and have been pleased with it. I have never had anyone work on it but myself. I have been seeing if I could get the elusive miss at idle to go away and was in the process of doing a top end cleaning when I ran into this problem. I popped the fuse panel cover to remove the fuel pump relay or fuse. What I found was an empty spot in the panel for a fuel pump relay and the fuse calls for a 20 amp in spot number 20. I found a five amp fuse instead. I tried pulling that 5 amp out and it still ran. I did end up disabling the fuel pump system but am very interested if anyone else has ran into this issue or maybe a modification or upgrade has been done to the system.
I am having the same issue. This diagram can't be right
 

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