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Discussion Starter #1
Im assuming there is a way to get the fuel pressure on a 2004 Colorado I5 3.5 other than the dealer. I asked my local garage to check it for me but they said they need a special gauge from gm to do it and I need to go to the dealer. Can anyone give me some insight into how to do it and what gauge system to get? I'm just trying to learn as much as I can with this truck since I plan on keeping it around for another 5+ years. Thanks in advance.
 

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Fuel Pressure Gage Installation and Removal

Special Tools

Installation Procedure

Warning: Refer to Gasoline/Gasoline Vapors Warning in the Preface section.

Warning: Remove the fuel tank cap and relieve the fuel system pressure before servicing the fuel system in order to reduce the risk of personal injury. After you relieve the fuel system pressure, a small amount of fuel may be released when servicing the fuel lines, the fuel injection pump, or the connections. In order to reduce the risk of personal injury, cover the fuel system components with a shop towel before disconnection. This will catch any fuel that may leak out. Place the towel in an approved container when the disconnection is complete.



  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief.
  2. Connect the CH-48027-1 (1) to the CH-48027-2 (2).
  3. Remove the shop towel from around the fuel rail service port, and place in an approved gasoline container.
  4. Perform any tests and/or diagnostics as needed. For the proper usage of the CH-48027, refer to the manufacturer's directions.
 

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Discussion Starter #6
Thanks for the help guys. I just picked up a tester from the local store for 40 so hopefully I'll get a definitive answer on my fuel issues. Again thank you and I'll let you know if I have any issues.
 

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You could probably use this tool. I am not sure whether the connector on the tool is compatible with your truck or not. Amazon sells it for $33.33. OTC is a good brand. Your local auto parts store may have a less expensive one.

I forgot the link: Fuel Pressure Tester Kit | OTC Tools

That's the tester I bought at Autozone a few month back and it worked just fine on a 2004 I5
 
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