Welcome to the ultimate in Professional Grade capability and capacity! The 2025 Sierra HD feels premium and luxurious inside, far exceeding what most would expect from a heavy-duty pickup.
The 2025 Sierra HD lineup includes 2500HD and 3500HD models, each in Regular Cab, Double Cab, and Crew Cab configurations. Dual-rear-wheel models are available in 3500HD, which brings the maximum towing capacity to 36,000 pounds. GMC offers several trim levels, including Pro, SLE, SLT, AT4, Denali, AT4X, and Denali Ultimate.
STARTING AT $46,300*
STANDARD FEATURES
AVAILABLE FEATURES
STARTING AT $50,400*
INCLUDES PRO STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES
AVAILABLE FEATURES
STARTING AT $60,100*
INCLUDES SLE STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES
AVAILABLE FEATURES
STARTING AT $71,000*
INCLUDES SLT STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES
AVAILABLE FEATURES
STARTING AT $73,900*
INCLUDES SLT STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES
AVAILABLE FEATURES
STARTING AT $83,200*
INCLUDES AT4 STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES
AVAILABLE FEATURES
STARTING AT $92,800*
INCLUDES DENALI STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES
AVAILABLE FEATURES
At Dieffenbach GM Superstore, you will have an automotive experience unlike any other. You can find new GM inventory, including the Blazer, Sierra, Acadia, Canyon, Suburban, and an unmatched collection of used car, truck, van, SUV and crossover inventory at our dealership near you.
Are you interested in leasing or financing your 2025 GMC SIERRA HEAVY DUTY 2500 & 3500 PICKUP TRUCKS? The Finance Department at Dieffenbach GM Superstore can help you find the right lease offer or finance solution that fits your budget. We cultivate relationships with many banks, lenders, and other financial organizations to provide you with great options in purchasing your new vehicle. In addition to the comprehensive factory warranty that comes with your new 2025 GMC SIERRA HEAVY DUTY 2500 & 3500 PICKUP TRUCKS, we offer extended warranty and protection programs to safeguard your investment.
Get the best deals and specials available to you on the 2025 GMC SIERRA HEAVY DUTY 2500 & 3500 PICKUP TRUCKS. Our knowledgeable sales staff wants to help you find the perfect fit in a new GM or used car. We can’t wait to welcome you to the Dieffenbach GM Superstore family and help you find your new car or used vehicle. Your support and customer service doesn’t stop after you sign your deal.
The expert Service Department at our GM dealership near you is always ready to help with any repairs or maintenance you might need to keep your vehicle running perfectly. Our Express Service Lane will get you back on the road quickly when you need basic maintenance like an oil change or tire rotation.
Would you like to make your new car all your own with personalized upgrades? Our well-stocked Parts Department has all of the GM authentic parts and accessories you need for the best customization of your vehicle. Make your car, truck, or SUV uniquely yours to fit perfectly in your lifestyle.
We are eager to help you on your car buying and vehicle ownership journey. Visit us today at Dieffenbach GM Superstore!
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