When I was driving down the road the other day my 05 tahoe started locking and unlocking doors and the whole car cut off.
Check the battery connections and the body to engine ground connections, check for moisture at body control mod connection.
also, have the battery load tested. it has to be fully charged for this.
Looking for a Used Tahoe in your area?
CarGurus has 36,956 nationwide Tahoe listings starting at $1,800.
Search Chevrolet Tahoe Questions
Chevrolet Tahoe Experts