Fuel pump failure
Thread Starter
Instructor
Joined: Nov 2004
Posts: 239
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From: Dubai
Fuel pump failure
Hi, 01 Zo6 with 40k kilometers swaped rear diff & after that car started & drove it for a day & next day cranking no start & fuel pump not priming , checked & found that pump is dead & replaced it with GM 19421092 , car started & drove fine then next day again cracking no start , checked & found new pump dead again 🤦 .
Fuse & relay are OK, any reason may cause this or is it just new part failure?
Ahmad
Fuse & relay are OK, any reason may cause this or is it just new part failure?
Ahmad
Moderator, Tech Contributor
Joined: Sep 2013
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From: Cape Coral, Florida
How EXACTLY did you determine the pump was “dead” ??…maybe apply power and ground directly to the pump and if the pump runs it’s not the pump…how did you test the relay ??
Thread Starter
Instructor
Joined: Nov 2004
Posts: 239
Likes: 35
From: Dubai
1st pump was tested using a jumper then removed from the fuel tank & they tested it directly & it wasn't working, 2nd pump again the same procedure.
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Joined: Sep 2013
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From: Cape Coral, Florida
If you bought this pump from Amazon or EBay you can expect those results !!…now did you jumper from the battery directly to the pump or from the harness connector ??
Last edited by C5 Diag; Nov 24, 2025 at 01:22 PM.
Thread Starter
Instructor
Joined: Nov 2004
Posts: 239
Likes: 35
From: Dubai
it was from ebay but it is original GM , as per the mechanic they checked by jumper the relay & also directly to the pump harness.
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,435
Likes: 3,982
From: Cape Coral, Florida
Thread Starter
Instructor
Joined: Nov 2004
Posts: 239
Likes: 35
From: Dubai
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,435
Likes: 3,982
From: Cape Coral, Florida
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