Questioning Dealership Integrity

Taking a vehicle to an authorized dealership is usually seen as the safest route for repairs. However, one Chevrolet Silverado owner is now questioning whether he was the target of a predatory pricing scheme after receiving a massive repair quote that didn't hold up under professional scrutiny.

The owner of a 2020 Silverado brought his truck to a GMC dealership due to an unusual noise coming from the engine bay. The dealership initially informed him that the vehicle required a complete engine and transmission replacement, slapping him with a staggering $15,000 estimate. Seeking clarity, the owner decided to take his truck to an independent facility, Dave’s Auto Shop, for a second opinion.


Conflicting Diagnoses and Questionable Repairs

The shop owner, Dave, highlighted the suspicious nature of the dealership’s interactions in a video. According to Dave, the dealership had allegedly attempted a minor fix prior to the engine quote, charging roughly $800 to replace spark plugs and wires. However, upon inspection, Dave’s team noticed that these components appeared worn, leading them to suspect that the dealership had either installed old parts or failed to perform the work entirely.

During the diagnostic process at the independent shop, the team discovered the following:

  • The initial dealership diagnosis of a full engine and transmission failure was likely incorrect.
  • The components the dealer claimed to have replaced appeared to be used or neglected.
  • The actual source of the noise was a mechanical failure in the valvetrain.

The Real Culprit: AFM Failure

After running error codes and removing the passenger-side valve cover, Dave’s team identified the root of the problem: a collapsed intake lifter on the No. 2 cylinder. This issue is linked to the vehicle's Active Fuel Management (AFM) system, which modulates cylinder activity to improve efficiency but is known to suffer from mechanical failures.

Dave explained the situation to the truck owner: «We pulled the valve cover off the passenger side, and you’ve got an intake lifter on that No. 2 cylinder … it’s collapsed. This has Active Fuel Management on it … basically, it can shut down cylinders at certain times.»

The independent shop recommended deleting the AFM system and replacing the camshaft and lifters. While this procedure was still a major repair, the total cost came in at approximately $9,000—a full $6,000 cheaper than the dealership's quote. Given that the truck had only 90,000 miles on the odometer, the original $15,000 estimate left the owner concerned that he was being taken advantage of by the very people he trusted to service his vehicle.