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Q: EGR Vaulve Sticking open on 1994 Chevrolet S10 Blazer

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
how do we get this from sticking. it usually only does this when we change elevation.
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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The problem may be with the EGR valve or carbon build-up in the engine. Carbon bits can work their way loose when the engine is under heavy load - climbing hills. The carbon can stick in the EGR valve holding it open. The valve may or may not clear itself out. Performing a "top engine decarbonization" procedure may help or correct this condition. Any good repair shop should be able to perform this procedure, It may be a bit complicated if you have never done it before. If the engine decarbonization does not correct the problem you may need to replace the EGR valve.
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