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How to prevent air in gas tank and gas lies of my 99 GMC sierra

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There will always be air in the fuel tank unless it is full up. There is air in the tank to allow the fuel pump to suck fuel and pressurise the fuel manifold. If you are continually getting air in the lines it is because there is not enough fuel in the tank or there is a hole above the fuel level. Remove the gauge unit and fuel pump (if in tank) and check for broken lines or loose connections.

Posted on Apr 22, 2014


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Posted on Jan 02, 2017

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SOURCE: auxiliary gas tank for a 2007 gmc sierra

go to jcwhitney they have a full line of replacement and auxiliary fuel tanks, as well has the selector valve that switch's from one tank to the other and this does the switching of fuel gauges as well, just go to or call em at 1-800-529-4486 and you may have to call em as its a 2007 may not be listed yet, check with your dealer and see if 06 is the same just in case, but with the 08s coming out already they should have it in stock, also check, they have a full line as well or call them at 1-800-230-3030

Posted on May 18, 2008

  • 196 Answers

SOURCE: 1996 gmc sierra 4.3liter v6

No access pannel you have to remove the tank. To do this job right relace teh entire fuel pum/sending unit and the electrical has to it some times the new unit comes with the wire harness also spen the extra 15$ and replace the fuel filter or it will burn out teh pump again.

Posted on Jan 10, 2009

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SOURCE: Is the fuel filter for the 2004 GMC Sierra 1500

You may be lucky and the fuel filter is still on the inside frame rail under the drivers door. 2004 was the change off year and 2005 was defiantly the no serviceable fuel filter.
You can go to the dealer with your vin number and they can look up in there system if you have the external fuel filter, or you can just look for it on the inside of your frame rail.
Thank you for using fixya and be safe.

Posted on Apr 18, 2010

  • 3854 Answers

SOURCE: 99 GMC Sierra 5.3L sputtering and hesitating

Check TPS for smooth and linear electrical response over the entire range of motion. If the response is jumpy or erratic at all, replace TPS.
Thank you for using fixya and good luck.

Posted on May 11, 2010

  • 2194 Answers

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.

Posted on Mar 27, 2012

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