95 Yukon 4door driver side
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Cutting a hole in the body for fuel pump access is SUCH A TERRIBLE IDEA. For FUKK SAKES do NOT do that. Not unless you're skilled at metal work--welding, fabricating, etc.
The odds are low, but the stakes are very, very high.
Let's say you get T-boned, and that Tahoe rolls onto it's roof in the ditch. IF (big IF) the fuel tank ruptures, all that gasoline is going to be funneled
into the passenger compartment, past the access hole you cut.. Maybe you're unconscious. Maybe you've got kids strapped into car-seats who can't get out on their own. Maybe the seat-belts jam. Who knows?
That gasoline catches fire, and everyone inside burns to death. If you're LUCKY, you die of smoke inhalation instead of the actual fire. Anyone conscious and burning to death will be screaming, begging to die soon.
THAT'S why GM does not provide an access panel.
Even if you have a panel bolted-down, sealed with a gasket (or tape)--if that section of the body crumples, it'll potentially leak. All that's missing is the fuel-tank rupture. Ford used a
single sheet of metal to separate the gasoline in the tank from the passenger compartment on the Pinto. Remember how that ended? Burned alive inside their cars, can't get out--and it didn't take much of a collision to kill people.
WELD THAT HOLE SHUT, with reinforcements.