Category: GMC Sierra HD

The definitive resource for GMC Sierra 2500HD and 3500HD owners. From breaking news and hands-on reviews to technical breakdowns of the 6.6L Duramax and Allison transmission, we cover the entire heavy-duty lineup. Whether you are maximizing your fifth-wheel towing capacity, researching Denali Ultimate features, or troubleshooting a service code, find the expert insights you need to keep your Sierra HD working hard.

GM Storing Unfinished Trucks In Muddy Field, Moving Them With Forklifts & Bulldozers
GM Storing Unfinished Trucks In Muddy Field, Moving Them With Forklifts & Bulldozers
Photos have emerged that show how GM is storing unfinished Silverado HD and Sierra HD pickups in muddy fields and allegedly moving them with a...
New 2023 Silverado HD & Sierra HD Photographed Without Grille Coverings
New 2023 Silverado HD & Sierra HD Photographed Without Grille Coverings
The redesigned 2023 Silverado HD and Sierra HD are continuing their development and inching closer to being production-ready. Over the weekend, a pair of camouflaged...
Refreshed 2023 GMC Sierra HD Prototype Caught With Production Headlights
Refreshed 2023 GMC Sierra HD Prototype Caught With Production Headlights
We’ve captured a 2023 GMC Sierra HD prototype undergoing testing with what appears to be production-ready headlights- giving us the best look yet at what...
The Ongoing Chip Shortage Just Added HD Radio To Its List of Victims
The Ongoing Chip Shortage Just Added HD Radio To Its List of Victims
Earlier this month, we reported that General Motors would be producing certain full-size pickup trucks and SUVs without stop-start technology. The fuel saving feature relies...
Interesting 2023 GMC Sierra HD AT4/Denali Prototype Photographed
Interesting 2023 GMC Sierra HD AT4/Denali Prototype Photographed
Spy photography of the refreshed 2023 GMC Sierra HD has been captured once again. This time, the truck captured is an interesting mix of trim...
Spy Shots Reveal First Look At Updated 2023 GMC Sierra HD
Spy Shots Reveal First Look At Updated 2023 GMC Sierra HD
The 2023 GMC Sierra HD is due to get a mild makeover, inside and out. Our spy photographer just captured the first look at what...
New TSB Issued For Duramax 3.0L LM2 and 6.6L LP5 Diesel P206B, Emission & Exhaust Fluid Errors
New TSB Issued For Duramax 3.0L LM2 and 6.6L LP5 Diesel P206B, Emission & Exhaust Fluid Errors
General Motors is addressing an issue that may cause check engine lights on 2020/2021 Diesel Silverado and Sierra pickups.  Both 3.0L and 6.6L Diesel Duramax...
GM Will Convert 650 Temporary Workers To Full-Time This Month
GM Will Convert 650 Temporary Workers To Full-Time This Month
General Motors is announcing that 650 part-time temporary workers will be converted to full-time roles in January 2021. The additional full-time jobs will be added...
Have a 2019 or 2020 Silverado/Sierra With Trailer Lighting Issues? GM Has A Fix!
Have a 2019 or 2020 Silverado/Sierra With Trailer Lighting Issues? GM Has A Fix!
If you own a 2019 through 2020 new generation Silverado or Sierra (HD included) that has trouble keeping trailer lights on and/or flashes the lights...
New TSB Fixes Zoomed Out 2020 Silverado/Sierra HD Rearview Camera
New TSB Fixes Zoomed Out 2020 Silverado/Sierra HD Rearview Camera
If the rear view camera on your 2020 Chevrolet Silverado HD or GMC Sierra HD isn’t displaying correctly there’s a new Technical Service Bulletin that...
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