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The fuel pump on that 98 Blazer would be found inside the fuel tank. The fuel tank would have to be removed to gain access to the pump.
You can't. 95-96 were the only Neon's that came with fuel filters, after 97 Dodge stopped equiping external fuel filters
Engine oil air transmission (auto only) fuel
That is what goes in the very top of the fuel tank.
on top of the fuel tank on the fuelpump mod.
One next to the battery under the hood. I believe there is also one built into the fuel pump.
Fuel filters in most GM vehicles are under the vehicle, behind the driver.
A 98 Blazer S10 has 5 lugs on each wheel.
You may have a leaky fuel injector or a faulty check valve in the fuel pump. I vote for the faulty fuel pump.