Question about 1998 GMC Suburban

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1998 GMC Suburban. Did an oil change about a month ago and then changed the spark plugs, but now the car won't even start??? I have no clue now.

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When you initially turn on the ignition switch,(before engaging the starter) do you hear a humming sound from the rear of the vehicle for about 3sec's? (sort of like a motor running) If not, you have a bad fuel pump. (The fuel pump is located inside of the fuel tank)

Posted on Jan 03, 2011

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GMC safari won't start, new coil, ICM, plugs (delco) Wires, cap, rotor, get's gas, new starter.


This just happened to my Dad's 1998 GMC Safari...

Firstly...

Check the hard vacuum line as previously noted by others.
If that's ok, then take off the intake pipe and spray brake clean into the throttle body while trying to crank it.

If it starts.. then you have a fuel related issue, if it doesn't start then you have an electrical related issue.

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Take off the console inside the vehicle's cab and get at the distributor.

Usually people noted that the ICM (ignition control module, inside the distributor) was the main issue here, but on our van, the distributor and wires looked brand new so it was probably recently changed (we got this van 5 months ago), so I assumed the spark plugs were also changed at the same time.

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Aug 05, 2012 | 2002 Chevrolet Suburban 2500

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I have a 94 Suburban. About a month ago I noticed a constant gumping noise near the front driver's side. It did it about twice in one day about ten seconds and stopped. It was suggested I need some oil. I...


Thanks for choosing FixYa and welcome. Check all your fluids. Oil, coolant, and transmission. It is a sign of low fluid to something. Check all levels.

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1998 GMC Suburban. Did an oil change about a month ago and then changed the spark plugs, but now the car won't even start??? I have no clue now.


nothing related here,ask a local mechanic to have a look for you ,could be a crank sensor or immobilisor in fact anything too numerous to mention .sorry but to give an accurate answer i would need a lot more information

Jan 03, 2011 | 1998 GMC Suburban

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try the oil pressure switch, that was a common problem on Gm trucks when I used to work on them, the oils switch was bad and woulden't allow it to start and the ones I worked on were on the back of the distributor.

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Your valves may be too tight. Try to retighten them using the loosen until it clacks and then tighten one full turn. Leaking oil can be blowby.

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