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.

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...
2021 GMC Sierra Adds More Innovative Trailering Tech
2021 GMC Sierra Adds More Innovative Trailering Tech
The new 2021 GMC Sierra will have a wide array of towing technology. John GorehamGM-Trucks.com
Chevy Silverado HD + BOSS Snowplow = Winter’s Worst Nightmare
Chevy Silverado HD + BOSS Snowplow = Winter’s Worst Nightmare
It’s a mid-April morning in Michigan and there’s a smattering of snow on the ground. Here it’s a few fluffy flakes, but as you work...
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