1997 Blazer runs great at 500-2000 rpm but after 2000 rpm cut out

When in park and you pin the gas it will cut at 3500 4000 rpm this is normal you need to drive it to check. Also I hope you didn't change the syncro for just the chirping noise, because it is a easy fix that nobody has mastered yet. I figured it out.

I would defenately check your fuel filtervvvvvvvvvv

Make sure your plugs are tight. I had same thing happen when a plug wiggled loose.

If the vehicle still runs, it may be the lite bulb burned out in the dash.

Hi,
It could be a bad fuel pressure regulator. See how to test it here:
http://www.ehow.com/how_6772033_test-regulator-1999-blazer-s_10.html
And if it is bad, how to replace it here:
http://www.ehow.com/how_5619311_replace-pressure-regulator-chevy-blazer.html
Part is around $80-$100 most places.
Hope that helps! Mike

Just to make sure, You do know that the 97 Blazer has daytime running lamps. Right? They will come on when you start it.

Chevy blazers dont have timing belts they have chains. The chains get noisey on some engines that are run hard or the oil changes are missed. Sometimes these engines live their whole life if not run too hard without changing the chain. Noise lower gas mileage uneven idel hesate to accerate. These are all things that happen over 100 thou miles. Many go way farther with no problems

I have had continuous missing issues on my 1997 Silverado after i had a new engine installed 30,000 miles ago. Today I purchased a new gasket for the EGR Valve and removed it. The mechanic had re-used the old gasket when he replaced the engine and cut corners to save $2.00. I found he had installed the EGR bass-ackwards causing my check engine light to stay on and the engine always to miss. Engine runs GREAT now

If the fuel filters havet been done in a while, changing all of them would probably help.

same just happend 2 me,was told it was the neutral safety switch -but didnt start in neutral-took 2 shop 400 later it was the ignition switch runs great again hope i helped