Question about 1999 Chevrolet Suburban

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How do i reset the computer on my 1998 gmc suburban 1500 5.7? ive changed plugs cap ect and i knoe i need to reset but cant remember how

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  • 236 Answers

Disconnect the battery. Wait 10 min. Reconnect battery, start engine with A/C OFF alow it to idle for10 min ( it will check all the sensors etc) . You should be god to go then.

Posted on Nov 12, 2009

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Cant get no fire/replaced distributor /cap and roter replaced crank sensor and coil put wires and plugs { and still cant get fire to distributor} 1996 gmc/1500 5.7liter


if i understand u correctly u replaced the distributor and cap if so i would start with making sure my pick up coil was installed correctlyand or replace it.i also would look at the possibility of it being a powertrain control module or neutral safety switch if this vehicle is equipt with one. hope ive been helpful

May 15, 2011 | 1996 GMC Sierra

2 Answers

1996 gmc 1500 truck 4.3 L does not want to start when cold when it does start after many tries.it runs fine . has new rotor&cap & wires when warmed up it starts 1 st. time! it just started doin...


The ECT should be located near the thermostat housing, screwed into the intake manifold. There may be a couple of sensors in the general location so compare the plug in portion to confirm which one it is.

Before you change the sensor, I would use a scan tool to see what information the ECT is actually relaying to the computer. I know I've seen ECTs tell the 'puter the engine was opposite of the symptoms you're describing. In other words the ECT was 'saying' it was -40°. Yea you read that right, 40° BELOW ZERO! Needless to say the engine would run super rich with that info.

So I would say it's POSSIBLE the ECT could be 'saying' the engine is warmer than it actually is which would result in poor cold starts.

It may also be the Manifold Air Temperature Sensor (MAT).

The 'puter isn't smart and is only going to adjust the perimeters for air/fuel, timing, etc. on the info it receives.

I don't want to simply say "go buy an ECT and/or MAT and put it in" because I'm not a believer in loading up the 'parts cannon' and firing away at a problem. Diagnose then replace.

Hope this helps.

Sep 29, 2017 | 1996 GMC Suburban

3 Answers

What is the firing order for a 1995 chevy k1500 and what order do they go on the cap ? 1-8-4-3 ect where is number 1 on the cap and do they go counter clockwise or clock wise Thanks joe


Hello, I have attached a figure to help you out. The point with out the black dot is Number one on the distributor. Hope this helps. Please rate.

Apr 21, 2010 | Chevrolet Suburban 1500 Cars & Trucks

1 Answer

I have a 98 1500 that shakes on the uphill grade


first try running a high grade fuel injector cleaner in the truck, then pull out each spark plug and examine its condition if you find a black one replace the plug first if problem persists replace all plug wires and plugs the the distributor cap and rotor. Sometimes a MAF sensor can cause this problem

Aug 05, 2009 | 1998 GMC Suburban

2 Answers

Need a wireing diagram for distributer on 1991 gmc 2500 sierra


I can help but I need to know what size of motor...and if it is a C1500/k15-2500/ Suburban....
please let me know and I can post a diagram for you.

Mar 15, 2009 | 1991 GMC Sierra

1 Answer

No Heat


You need to verify the blend door is operating and the heater core is not plugged or coolant flow to it is restricted.

Oct 29, 2008 | 1993 GMC Sierra

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