How do i replace fuel pump on a 2006 CTS Cadlly

There is a service port on the fuel rail (similar to a large tire valve) that you screw a fuel pressure gauge to and turn the key to the ON position and see how much pressure builds up during the "priming cycle". Some auto parts stores have "loaner" gauges that you can use to do this. If there is no fuel pressure, then you need to check your fuel pump circuits. They can all be checked/tested from the pins at the fuel pump relay.

If the fuel pressure is good, then you need to diagnose your fuel injector system. This can be anything from shorted injectors, to the security system diabling the fuel injectors, to wiring problems to a failed PCM. This is why it is best to scan the PCM for fault codes FIRST. Doing this can eliminate several steps if there are faut codes present that will lead you to the system that is failing. If you want to do a lot of repairs yourself, it would be wise to buy at least an inexpensive OBD code reader. If you can pull the codes, then someone like myself can guide you through the diagnostic process for the codes that you are getting. A code reader that can also output live data is best, but also more expensive.

For example, I had one just this week that cam in running really bad and had injector failure codes for every injector. Knowing that it is not very likely that ALL of the injectors would fail all at the same time, I checked the connector at the PCM for corrosion and found that several of the terminals were green. I cleaned the connectors and applied dielectric grease to them and the car is fixed. You might get this lucky - or maybe you really do need a fuel pump.... The best (and CHEAPEST) way to find out is with proper diagnosis. There is a service port on the fuel rail (similar to a large tire valve) that you screw a fuel pressure gauge to and turn the key to the ON position and see how much pressure builds up during the "priming cycle". Some auto parts stores have "loaner" gauges that you can use to do this. If there is no fuel pressure, then you need to check your fuel pump circuits. They can all be checked/tested from the pins at the fuel pump relay. If the fuel pressure is good, then you need to diagnose your fuel injector system. This can be anything from shorted injectors, to the security system diabling the fuel injectors, to wiring problems to a failed PCM. This is why it is best to scan the PCM for fault codes FIRST. Doing this can eliminate several steps if there are faut codes present that will lead you to the system that is failing. If you want to do a lot of repairs yourself, it would be wise to buy at least an inexpensive OBD code reader. If you can pull the codes, then someone like myself can guide you through the diagnostic process for the codes that you are getting. A code reader that can also output live data is best, but also more expensive. For example, I had one just this week that cam in running really bad and had injector failure codes for every injector. Knowing that it is not very likely that ALL of the injectors would fail all at the same time, I checked the connector at the PCM for corrosion and found that several of the terminals were green. I cleaned the connectors and applied dielectric grease to them and the car is fixed. You might get this lucky - or maybe you really do need a fuel pump.... The best (and CHEAPEST) way to find out is with proper diagnosis.

I am a IT tech. and your last statment is right .I thank you for al of teh hepl you have giveing me. If you ever need copier or IT halp feel free to email me at [email protected] I am the owner and my name is Orion Richardson. I am a IT tech. and your last statment is right .I thank you for al of teh hepl you have giveing me. If you ever need copier or IT halp feel free to email me at [email protected] I am the owner and my name is Orion Richardson.