Code 463 is for a problem with the fuel sending unit circuit. The most common cause is a faulty sending unit or a problem with the wiring harness to the tank.
SOURCE: 99 GMC Sierra fuel pump clicking sound
There should be no clicking sound coming out of fuel pump, if it's still running fuel pump is getting ready to go out on you, replace it,hope this was very helpful.
Testimonial: "Fast reply"
SOURCE: original color code "burgundy" of 1989 gmc sierra 2500
Use this guide to help you find the color
https://www.duplicolor.com/color_selection.pdf
Testimonial: "Thanks!!! I had checked there, but that part of them sticker is worn off. I should have been more clear. Thanks so much for taking the time to try and help. Have a great night!"
SOURCE: My 99 gmc sierra 4wd
sorry there is no quick fix, if there was a general code it would be too simple to steal any radio, check the owners manual or somewhere in the glove box
SOURCE: 99 gmc sierra surges while idling in gear what can
clean the EGR valve and also the idle control motor valve
SOURCE: my security light stays on & won't let my 99 gmc 6.5 diesel sierra start any solutions
Yes, the system is called Passlock, and malfunctions regularly. Go to this link for an explanation of how it works, plus some tricks and tips on how to reset it, or bypass it.
http://vatspasslockpasskeysecurityhelp.yolasite.com/
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