Question about 1997 Chevrolet Blazer
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Posted on Jan 02, 2017
Hi David & Debbie!
You are correct, the pump is in the gas tank.
Occassionally (very rarely), you might find an access hatch in the trunk floor, but don't count on it.
As this is an electric pump, you also need to check items like fuses and fuel pump relays, and an Auto Supply expert can help you with that. You can also determine whether the pump is running by removing the gas cap and putting an ear to the opening while someone switches the ignition key off and on. You should be able to hear faint electric motor noise if the pump is running.
To get to the pump, remove as much gas as possible from the tank (to lighten the load when the tank is loosened), locate the two metal straps that hold the tank up, and find the tightening nuts and bolts at the rear edge of the tank. Arrange some kind of support (preferably a floor jack) under the tank and loosen the strap bolts... the tank will lower. Once these bolts and straps are separated the tank can be lowered enough to give you access to the top and the fuel pump/gas gauge sending unit. There is a locking ring that must be loosened and this is done with a hammer and screwdriver or chisel, turning it counterclockwise. Remove the fuel lines and wiring (remembering what goes where) and then remove the pump assembly.
Reassembly is the above in reverse order.
Hope this is illuminating and helpful, don't hesitate to ask if you have further questions or comments, and please be so kind as to rate my assistance. Please let us know how it goes, and best of luck!
Posted on Jun 18, 2008
easier to drop tank...use lots of wd 40 on bolts , do that at least beginning the day before you begin work. make sure tank is fairly empty gasoline is pretty heavy and shifts around. While you have the tank removed look inside with a flashlight and make sure it's clean. If you did the filter with the tuneup likely you don't need another (unless you find lots of rust in tank) Don't forget. gasoline is flammable and fumes spread out over the ground. don't use electric lights drills or open flames anywhere nearby.
good luck hope that fixes it!!! sounds like you covered everything else!
Posted on Mar 26, 2009
ok i'm going to guess that you have a gasoline engine with a side tank like in a pickup truck. if you have a diesel let me know, things might be a little different. here's the step by step for a gas side tank. before you start, disconnect the battery negative cable.
1. drain the fuel from the tank (they don't tell you how, just get as much out as you can)
2.raise and safely support vehicle (get it high enough that you can get under it to work on it)
3.loosen the fuel neck hose at fuel neck and disconnect filler neck from tank
4.support tank and remove tank support straps and insulator strips
5.remove frame mounted bracket
6.lower fuel tank shield
7.lower fuel tank enough to gain access to fuel and electrical connections
8.disconnect fuel feed and vapor hoses
9.disconnect electrical connectors
10.remove fuel sender assembly and seal ring
now to install new tank
1.install NEW seal ring and install sender
2.raise tank enough to connect fuel feed /vapor hoses and electrical connector
3.raise tank fully
4.install fuel tank shield
5.connect fuel tank filler neck and tighten clamp
CAUTION tighten fuel strap fasteners in steps, alternating between straps, until proper torque is reached. failure to properly follow this step can cause bottom of tank to deform. fuel gauge may read improper level if this occurs
6.install fuel tank brackets and insulator strips
torque nuts to 115 in-lbs
7.install fuel tank filler cap
8.connect battery negative cable
9.turn ignition switch off and on and check for leaks
it's pretty much the same for rear tank, just different location, may have off-road shield in back and torque spec is 47 ft-lbs, not 115 in-lbs. you still have to alternate when you torque straps or you risk deforming tank. hope that helps
Posted on May 29, 2009
take off the bed and slide it 3 to 5 feet back..and you will have a clear vision of the fuel pump..make sure u disconnect all the light wiring on the rear and the fuel cap and filler hose before removing the bed good luck
Posted on Apr 21, 2010
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