We recently replaced the battery in our 99 suburban 1500. Then started having starter troubles. Now, it turns over but will not start. Spark plugs? Or something more serious?

Make sure battery has a full charge and battery connections all good. If it cranks good but won't start, have a helper crank it while you check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse. How long since a tune-up? Any applicable trouble codes? This is a chevy pick-up, what year?

Is there an immobilizer light lit (anti-theft ) on the instrument cluster ? Pull a spark plug wire an crank the engine , Is there spark . If there is spark ,do a fuel pressure test . Do you know about these thing's I just talk about ? There are a lot of good trouble shooting videos on youtube . No Start Diagnostic Basics EricTheCarGuy

If your saying the starter motor won't crank? Make sure the battery has a full charge and battery connections are all good. Then check the wiring circuits at the starter for voltage and ground. When testing at the starter make sure tranny is in park or neutral and the parking brake is set.

If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure, also check fuel injector pulse. Can you check applicable trouble codes? How long since a tune-up?

Have you never had a problem like
that, since you started driving?

Start testing things-- to find a problem

Is the battery dead,old,worn out?
Have it tested

Test the starter & solenoid

Examine & test the battery cables

& many other items effecting the starting system

Won't Crank (turn over)?
or
Won't Start?

Won't Start check for fuel pressure,spark,injector
pulse & so on

assuming the starter is installed properly, it could be a variety of things. if the battery is not strong enough to fully start the truck. could check the condition of spark plugs and spark plug wiring.

Have you checked the fuel pressure regulator to see if its leaking?

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.

To confirm the problem, the basic troubleshooting is required.

Click this link below and follow the troubleshooting:------

http://technoanswers.blogspot.in/2012/02/car-starting-issues.html

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This will help.

Thanks.

this sounds like you have a problem with the electric fuel pump sticking, that would be where i would look, when u turn the key on with the windows up do u hear a humming noise for about 3 seconds? if not the fuel pump is the problem.

I HAD THE SAME PROBLEM WITH MY 1999 GMC YUKON WITH THE 5.7 ENGINE HAVING TO JUMP START ALL THE TIME TO GET IT RUNNING, THE PROBLEM WITH MINE WAS THE FUEL PUMP HAD TO BE REPLACED, EVEN WHEN I REMOVED THE PUMP AND TURNED THE KEY FUEL PUMPED OUT BUT WAS NOT ENOUGH PRESSURE TO GET AND KEEP THE ENGINE RUNNING.I ALSO TRIED STARTER FLUID, THE ENGINE WOULD RUN UNTIL THE FLUID BURNED OFF.SO THE SOLUTION FOR MY TRUCK WAS THE FUEL PUMP AND NOW ITS STARTING LIKE A CHAMP

Have your Starter Solinoid Checked. Sounds a lot like the Culprit!