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The GM Fuel Pump
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<blockquote data-quote="Shinneryfarmer" data-source="post: 3464271" data-attributes="member: 46291"><p>First question. 1. How full is the tank? If it is below 1/4 drop the tank. 2. If it is closer to full either siphon it out or pull the bed. If you pull the bed access is easy but you will need 4 guys to lift it off or rig up a lift to pick up to allow access. 3 Have you checked ground wire at tank? If you have a bad ground wire where it connects at tank it will cause it to act goofy. Sometimes these get dirty or corroded. Also I have found a partially pinched wire or chewed wire by a mouse that will cause it to act that way. You can use a mirror and light to sometimes look for this issue. You didn't specify year so some years have a pig tail connecting wiring to tank these can also cause bad connections.</p></blockquote><p></p>
[QUOTE="Shinneryfarmer, post: 3464271, member: 46291"] First question. 1. How full is the tank? If it is below 1/4 drop the tank. 2. If it is closer to full either siphon it out or pull the bed. If you pull the bed access is easy but you will need 4 guys to lift it off or rig up a lift to pick up to allow access. 3 Have you checked ground wire at tank? If you have a bad ground wire where it connects at tank it will cause it to act goofy. Sometimes these get dirty or corroded. Also I have found a partially pinched wire or chewed wire by a mouse that will cause it to act that way. You can use a mirror and light to sometimes look for this issue. You didn't specify year so some years have a pig tail connecting wiring to tank these can also cause bad connections. [/QUOTE]
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