GM buys back Chevy Silverado and GMC Sierra pickups instead of Duramax diesel engines

GM is repurchasing an unknown quantity of diesel-powered Chevy Silverado and GMC Sierra pickup trucks. The company is silent on the number of trucks involved. The years the problem also affects are unknown. What we do know is that the issue involves quality issues surrounding the Duramax 6.6L L5P V8 turbo-diesel engine.

A dealer order quote will be issued on April 21, 2022. It encompasses both fleet and retail truck buyers. Some trucks, but not all, have already been purchased. Besides not knowing the years or the number of trucks involved, we also don’t know what the problems are with the Duramax engines.

Will GM buyout replacements be 2022 Silverado and Sierra trucks?

2022 GMC Sierra AT4X | GM

GM will replace the trucks with 2022 Silverado and Sierra trucks. The unfortunate part of the buyout is that the trucks being assembled right now don’t have all the features of the trucks that were built previously. With the shortage of microchips affecting many components used in these vehicles, it is reminiscent of the issues plaguing manufacturing today.

So far, many options are not available. These include heated and ventilated front seats, heated outboard rear seats, a heated steering wheel, and front and rear park assist.

There have been issues with the Duramax for years. The 2003 Duramax was called problematic. GM started using the Duramax engine in its trucks in 2001. It stopped production of the 3.0-litre LM2 turbo diesel engine for a few weeks at the end of 2021. Production restarted in November 2021.

Who makes Duramax engines for the Silverado and Sierra?

This 2022 Chevy Silverado 2500 HD with a Duramax diesel engine is one of the most durable Chevy trucks you can buy.

2022 Chevrolet Silverado 2500 HD | Chevy

GM produces the Duramax engines at its engine plant in Flint, Michigan. The LM2 turbo diesel develops 277 horsepower and 460 lb-ft of torque. The head and block are aluminum, with a forged steel crankshaft, forged connecting rods, iron cylinder liners and hypereutectic cast aluminum pistons.

On top there is a DOHC valve train to handle common rail and direct fuel injection. A liquid-to-air intercooler helps keep temperatures down. It all works out to give 23 mpg city, 31 mpg highway and 26 mpg combined.

What problems does the 6.6 liter Duramax diesel have?

Blue 2022 Chevy Silverado High Country

2022 Chevrolet Silverado High Country Blue | Chevy

As for the 6.6-liter Duramax, it offers 445 horsepower and 910 lb-ft of torque. It is available with six-speed automatic or 10-speed MGM or MGU automatic transmissions. The main issues with the 6.6-liter seem to be fuel injection issues. They’re poorly designed, which GM’s supposed engineers admit.

Running out of fuel, air in the fuel lines, and system bleeding issues are all known issues. The blame is not having an electric low pressure lift pump, which moves fuel from the tank to the injection pump. We don’t know if this is the reason for the redemptions.

Once it’s clearer what affects the engine and which models are indexed for buybacks, we’ll update this post. Redemption information should be available before April 21, 2022, as some redemptions have already taken place.

RELATED: Reminder: Diesel Engine Fires Target More Than 330,000 Chevy Silverado-GMC Sierra Trucks

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