Buick Repair Questions? Ask a Mechanic for Answers ASAP
This is usually what you see from a circuit that is intermittently open,but it can be a solenoid faining.Use an ohm meter to monitor the circuit & solenoid.
What model,year & engine size is your Buick ?
All the shift solenoids are on the valve body .Your reference to the "E" solenoid is unknown.The solenoids are called shift solenoids 1-2,3-4 ,or TCC.Here is a pic.