Question about 1987 Chevrolet Blazer

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I need to know how to find and fix a 1987 chevy blazer gas gauge

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  • Chevrolet Master
  • 2,002 Answers

The sending unit for the guage is in the tank, so it will have to come down. Your problem will likely be the wiring has separated from the pins on the sending unit itself. If you are really patient and lucky you may be able to salvage it by reattaching them but you will most likely have to replace the unit.

Posted on Oct 19, 2013

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Posted on Jan 02, 2017

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SOURCE: Troubleshooting non-functioning gas gauge on 2002 Blazer 2-door

Sure there is!

When you turn the key on, and the gauges and warning lights come to life, does the needle on the fuel gauge move a tiny bit? It should. If it does move a hair, this is a good sign your gauge is still good. If not, keep reading.

The gauges themselves are usually not at fault, but they can fail, of course. Usually, it's the sender or float that's the culprit. The assembly resides in the fuel tank in the module or unit that houses your fuel pump. Many customers (when faced with the cost of this tank job) will opt for waiting until the fuel pump goes bad, and replacing pump and sending unit together. However, there are obvious drawbacks to this!

ONE test you could do if you are good at driveway car work is this: Crawl under vehicle and find the bundle of wires (not tubes or lines) that goes up to the top of the fuel tank. Sometimes you can reach it through the rear wheel well. Follow this small group of wires up to wherever it plugs in to the pigtail coming out of the tank. THis could be on top of tank, or just outside the perimeter of the tank. Unplug this connection. Using a common 12 volt test lamp probe, ground the test lamp, turn the key to the "ON" position so dash lights up, and touch tester to each wire tip on the end not connected to the tank (engine side of wire harness.) Have someone watch the fuel gauge as you touch the leads one by one. The gauge should move when one of these is grounded thru the lite. Total deflection of the needle means your sender is at fault, not the gauge. BUt it's usually the sender, anyway. THey're cheap enough, but the labor on a tank job can vary from place to place.

Good luck, TT

Posted on Feb 23, 2009

  • 295 Answers

SOURCE: 99 chevy cavalier fuel gauge jumps

The fuel pump as a gage sender that monitors the gage in the dash. I would replace the fuel pump .
Very common problem

Good Luck

Posted on Apr 18, 2009

michigan man
  • 3533 Answers

SOURCE: need picture diagram of vacuum hoses for 1987 chevy s-10 blazer

try this website to see if they have your car listed its if you are not able to get it try your local library or local chevrolet dealership in the parts department

Posted on Apr 27, 2009

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