When it cuts out the gauges all flat line then goes back to normal act almost like a fuel pump going bad
More than likely that it is either ba crankshaft position sensor if it has one or ignition module because they build resistance when the copper windings inside them get hot on the crankshaft sensor or when the ignition module heats up they begin to fail its very common for these things to go bad on chevrolets also you might want to look into your fuel pressure because fuel pumps also begin to fail in this way you described when they are worn out and when they cool down they work again
also those models have a body control module that is known to fail and it controls all your gauges and lighting
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SOURCE: Temp gauge
the sender for the gauge is on the cylinder head near the spark plug if you unplug it the gauge should stay all the way cold then ground it out it will go all the way hot if that reads like that replace the coolant sensor
SOURCE: fuel pump on 1999 chev silverado cuts out
check the connector had problems with burning up.sounds like it may be corroded
SOURCE: HELP! HELP! SOMEONE PLEASE ! 2001 chevy blazer fuel problems
I would check to be on the safe side the fuel filter is going in the right direction. The arrow is pointing towards the engine away from the fuel tank, Then you need to make sure the fuel pump wiring connections are good contact and did not come loose when driving.
SOURCE: 1990 full size blazer starts fine idles then dies
sounds real easy either a bad idle air control solenoid or more likley a blown throttle body gasket. to test fro a blown gasket, with engine running and cool spray carb cleaner or brake cleaner around base of tb were it bolts to intake. when it hits the bad area, should idle down and be normal for a second or 2. iac is possible,try this first since its so common and let me know
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