20 Most Recent 1989 Chevrolet Suburban Questions & Answers


Yes typical problem and know about the pain in the #$#$ about getting the tank down.

The relay is under the hood and in the relay box. Quick check the fuel pressure on the injection rails.

Yes you could add an inline fuel pump to the line and see if that would create enough pressure. I do that on my race cars.

1989 Chevrolet... | Answered on Feb 15, 2018


Take the airbox cover off spray some starting flood into the throttle body see if it fires if it does week fuel pump

1989 Chevrolet... | Answered on Oct 29, 2017


Your serpentine belt tensioner may be bad,not holding enough tensioner and not letting your alternator keep a charge on your battery,get some one to sit in your vehicle,open hood,have them start it while you watch the belts turn and have them rev the engine up to see if the belt turns loosely.another thing to look at is the A.C.compressor locking up .Power steering pump could be locking up,just check it out while it's running and see.

1989 Chevrolet... | Answered on Jun 15, 2017


Go this site and look up the value, based upon the condition and options for your vehicle. http://www.kbb.com/chevrolet/

1989 Chevrolet... | Answered on Apr 17, 2015


1989 model should be mounted on the intake near the distributor.

1989 Chevrolet... | Answered on Feb 15, 2015


Fuel Pump Relay Circuit...
There is an Oil pressure switch in this circuit that disallows the relay to complete the power supply to the fuel pump. It is for safety purposes , it senses engine oil pressure upon cranking of the engine and then completes the ground circuit to close the relay sending voltage to the fuel pump at start up, and also functions as an engine kill if you loose oil pressure opening the ground circuit which in turn opens the contacts in the relay shutting off the power to the fuel pump.... Invest in a vehicle specific repair manual with wire diagrams... hope this helps..

1989 Chevrolet... | Answered on Aug 27, 2014


There are MANY reasons why a car of that age will lose power, not the least of which is engine wear and "blow-by" (a term used to describe the loss of compression past rings and valve seals, usually accompanied by a loss of engine oil).
If your vehicle is burning crankcase oil, or if you remove your oil cap while the car is running and feel air coming out of the oil fill, your engine is really worn and will probably have a hard time going up hills.
Also very common on vehicles of that age is rust in the fuel tank, which will clog the pickup screen (or "fuel sock"), and also clog the fuel filter with rust particles. A good place to start is replacing your fuel filter, and see how much RED is visible. (Any RED you see in what comes out of the input side of your fuel filter is rust from the gas tank.) If you get red gunk out of your old fuel filter, you'll definitely need to clean or replace your fuel tank and replace the fuel sock as well.
Next thing to check is the last time the vehicle had a major tune-up. Was it over five years or 25,000 miles ago? Go ahead and do a major tune-up. (Do all that applies to the engine you have: Plugs, wires, cap, rotor, coil, coil packs, throttle body clean, static timing adjust, ODB code clearing, and complete fluid change INCLUDING transmission AND both differentials).
As far as the vehicle "blowing out transmission fluid," I can't answer that at all, not knowing where it's blowing it out from.

1989 Chevrolet... | Answered on Jul 23, 2014


have a pressure test done on the cooling system to find the leak. Check the heater core when the system is pressurised as well

1989 Chevrolet... | Answered on Feb 18, 2014


recently had new alternator on my ford focus 2001,as last one was overcharging.lately ive noticed that whilst driving my speedo drops to zero and battery light comes on could this b the speed sensor needs replacing? would this cause battery light to come on?

1989 Chevrolet... | Answered on Jan 24, 2014


It will but you will lose Overdrive and that will cost you a lot of gas money in a Suburban. You will have to rewire the neutral safety switch as the TH350 only has 2 wires.

1989 Chevrolet... | Answered on Oct 25, 2013


Is the check engine light on ? It could be a vac leak or a problem with the idle air control valve.

1989 Chevrolet... | Answered on Jul 03, 2013

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