General Motors responded to a request for Autoblog regarding a no-sale order on its full-size heavy-duty pickup trucks. Here is the official statement from GM.

• GM is committed to manufacturing the highest quality products possible.
• We suspended delivery of a small number of HD pickups with the Duramax 6.6 liter engine last week to finalize an investigation into a potential quality issue.
• The investigation is complete and the sales ban will be lifted for the small number of vehicles at dealerships.
  Customers can rest assured that GM heavy-duty pickups are backed by a 5-year/100,000-mile powertrain warranty.

The original article continues below.

General Motors has reportedly sent its Chevrolet and GMC dealers a stop-sale order that applies to certain copies of the 2022 Silverado HD, 2022 Silverado MD and 2022 Sierra HD. sale may develop an engine related problem.

Citing anonymous sources, website GM Authority wrote that the affected trucks’ Duramax 6.6L V8 turbodiesel can lock up, which means that fluid could enter the cylinders and cause significant damage. The report does not specify where the liquid came from; hydroblocking can occur when driving through a deep puddle, for example, but a large amount of coolant can also be the cause.

The publication adds that the sales ban order was given the internal reference number N222362910. It also notes that the trucks included therein cannot be sold, delivered to buyers, traded with another dealer, sent to auction, or even used for demonstration purposes until further notice.

Earlier in April 2022, GM Authority reported that General Motors planned to repurchase an undetermined number of Silverado HD and Sierra HD trucks due to quality issues with the 6.6-liter V8. Details of the issues faced by customers have not been released; all we know is that each truck will be replaced, although the replacement may not have the same equipment due to the continued shortage of chips.

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