Should I Sue A Car Dealership? For Truck Being At Dealership For 8 Months?

January 2026 I am in Tennessee
I took my truck to the dealership because the heat wasn’t working.
They diagnosed head gasket/cylinder head issues and told me the engine was failing. They said a complete engine replacement would be the best repair, but the warranty would not approve that.
Instead, they pursued repairs to the cylinder heads/head gaskets.
My truck remained at the dealership while they worked with the warranty company.
March 2026
The dealership completed the head gasket repair and told me the truck was ready.
I picked it up, but within minutes it started shaking, the check engine light came on, and it was leaking coolant.
I immediately turned around and brought it back to the dealership.
They gave me a loaner vehicle.
A few days later they told me the radiator was leaking and needed to be replaced, but that the radiator was not covered by my warranty.
Around this time I was also told about a cylinder misfire. I wasn’t told about that when I originally brought the truck in during January.
May–June 2026
According to an email from my warranty company, the dealership submitted a new claim on May 6, 2026.
The warranty company told me they made six attempts to contact the dealership for additional information and updates but were unable to get a response.
Because they could not obtain the requested information, they closed the claim on June 4, 2026.
I received that email from the warranty company on June 8, 2026, explaining why the claim had been closed.
The dealership later told me they had overlooked the denial/closure email for about a month before informing me.
During this time, my truck continued sitting at the dealership while I remained in a loaner vehicle.
Following months
There were continued discussions about replacing the cylinder heads, possible engine failure, warranty inspections, and different diagnoses.
At different points I received different explanations for what was wrong with the truck, which made it difficult to understand what was actually causing the problems.
My truck remained at the dealership for several months.
August 2026
The dealership told me they had replaced the radiator and spark plugs and that the truck was repaired.
They said all I needed to pay was about $540 because the radiator repair wasn’t covered by my warranty.
I paid the bill and picked up my truck.
Within about 5–10 minutes of leaving the dealership, the check engine light came back on.
I immediately turned around and brought it back to the dealership for the second time after they had told me it was fixed.
They put me back into a loaner vehicle.
My concern
This is now the second time I’ve been told my truck was repaired, only to have to return it almost immediately because of another issue.
I’ve now had my truck in and out of the dealership for months, paid over $540 out of pocket for a radiator that wasn’t covered by warranty, and still wasn’t able to drive my truck home without another problem occurring.
I have kept my repair invoices, warranty emails, text messages, and service records.
My questions are:
Is this normal after major engine repairs?
Should I continue letting the dealership repair it?
Is it worth consulting a consumer attorney?
Has anyone experienced something similar, and what was the outcome?
Location: Tennessee