Georgia mechanic solves 2009 Chevy Tahoe's issue with 'simple fix' after dealership tries two engine swaps

This Georgia mechanic solved a months-long mystery that had stumped multiple shops and cost thousands, all thanks to a simple fix on a Chevy Tahoe.

The 2009 SUV had been misfiring badly, even after the dealership tried two different engines, new cylinder heads, plugs, coils, and ignition wires.

Despite all the parts swapping, the misfire never went away, until the owner brought it to Royalty Auto Service in Georgia.

There, mechanic Sherwood ditched the guesswork and uncovered the real issue in minutes.

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Why even a new engine didn’t revive the Chevy Tahoe

The Chevy Tahoe’s owner had gone to a Chevrolet dealership with an AutoZone-sourced engine in tow, hoping to resolve what they believed was a misfire on cylinders 2 and 3.

The dealer agreed to install it, but the misfire persisted.

They then tried swapping cylinder heads, but that didn’t work either.

Their next stop was to replace the entire engine with a GM remanufactured one.

Still no improvement.

Out of ideas and patience, the owner turned to Royalty Auto Service after discovering them on TikTok.

Replacing parts is not always the solution

When Sherwood first examined the Chevy Tahoe, the data didn’t match the story.

The scanner flagged a misfire on cylinder 1, not 2 or 3.

Instead of second-guessing the readings or relying on hearsay, he let the scan tool guide his diagnosis.

A compression test showed no internal engine issues.

The spark plugs and coils had already been replaced, so he turned to the next possible culprit: wiring.

After checking connections at the ignition coils and fuel injectors, Sherwood discovered a bad electrical connector at cylinder 1’s ignition coil.

Holding the connector in place caused the misfire to vanish in real time, which was clear confirmation that this small fault was the root cause all along.

“Now I just gotta ride around with the people and keep my finger there,” he joked, before replacing the faulty connector for good.

The fix? A simple electrical connection, not a new engine.

This story is a textbook case of how methodical diagnostics beat guesswork.

It’s also a great example of how getting your car to the right person can work miracles, like this Missouri man that managed to fix a Miata nobody else could.

In any case, even if you got your car diagnosed by a mechanic, it doesn’t hurt to get a second opinion.

Just ask this man, who managed to quickly fix a cheap BMW M3, all because of a misdiagnosis.

The moral of the story is, if you have car problems and don’t have mechanical experience, find a good mechanic, rather than trying to do it yourself.

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