Question about 1989 GMC Suburban
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Posted on Jan 02, 2017
your vehicle has a MAPS and not a MAFS, the MAPS will be passenger side of the intake manifold, above the valve cover and mounted on a bracket
Posted on Oct 13, 2008
You'll have to take the fuel tank off, so make sure you have something to support it, while loosening the tank straps. Lower it down far enough to disconnect the sender and pump wires, and the fuel line. Drag the tank out where you can work on it, and you can carefully use a hammer and screwdriver and chisel to tap on the lock ring until it rotates the 1/4 turn it needs to come off. Remove, and replace it with the new one. While you have it open, it's easier to empty it out into gas cans so it's easier to put back up. You may want to put a light coating of a silicone based lubricant on the o-ring when you put the new pump in. After that's done, just make sure that you hook everything back up the way you found it, and put gas back in it, and you're done.
Posted on Oct 03, 2009
You need to replace the fuel filter every 30000 miles.The gas stations tanks are full of dirt. Also check the flow of the catalitic converter.Put your hand at the tail pipe while someone is pushing the gas petal down. The farther they push the petal the more exhaust should be coming out.
I hope this helps you
Posted on Oct 06, 2009
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This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control
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