Sierra 2500HD

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2006 GMC Sierra 2500HD Overview

As if it needed more power, the 2006 GMC Sierra 2500 boosts its 6.6-liter, turbodiesel Duramax V8 to 360-hp and 650 lb-ft of torque, putting it well above the 8.1-liter, 340-hp V8 that gets 455 lb-ft of torque. Both engines come with either a 6-speed manual or a new 6-speed Allison 1000 automatic that is both quieter and puts out less emissions. The standard engine remains a 6.0-liter, 300-hp V8 matched to either a standard 5-speed manual or 4-speed automatic. The 3/4-ton pickup comes in either rear-wheel or part-time four-wheel drive in Regular (one split-folding front bench), Extended, or Crew Cabs (two rows of seats, with split-folding rear seats). An 8-foot bed accompanies the Regular Cab, while a 6.5 or 8-foot bed comes with the Extended and Crew Cabs.

Also new this year are the trim designations, which now number five. The Work Truck is minimally equipped, while the new SL1 adds cruise control and a CD player. The SLE1 and SLE2 add power features, power front seats, and foglights, and the upscale SLT combines work function with family-friendly comfort by adding heated leather seats, memory settings, upgraded audio system, and retractable mirrors, which are new this year. All trims feature ABS brakes, 16-inch wheels, automatic headlights, and dual front airbags, and the 2006 GMC Sierra 2500HD earns three stars in crash ratings.

Towing capability is what this truck is known for, and when equipped with either the Duramax or the 8.1 V8, this pickup can tow up to 12,000 pounds with minimal effort. The bed features plenty of tie-downs, and a cargo cover and bedliner can be added. The new Allison automatic, in combination with the beefed up Duramax is a big hit with owners, who are awed by its hauling performance. Other pluses include a surprisingly quiet and smooth ride, a roomy interior, and acceleration. There are complaints about the bland interior materials and the wide turning radius.

Updated by Anonymous

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Sierra 2500HD

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GMC Sierra 2500HD Questions

Private Seller Not Responded

How do I get a private seller to respond, I’ve sent messages and emailed with no response for over a week

Oil Pressure Sending Unit

where is the oil pressure sending unit on the GMC 2006 Sierra HD Sle 4x4 xtended cab?

Trailer Lights Not Working

just bought a new utilty trailer and when its hooked up to my 2006 gmc sierra 2500 the only lights that work are the taillights what fuse runs the towing package

Spark Plugs Getting Ruined Very Frequently

Hello! This question is in regard to a 2006 GMC Sierra 2500HD (8.1L gas engine) with 197,000 miles on it. It had around 60k or 70k miles when I bought it in 2012. It has had a rough life since then ...

I Have A 2006 GMC 2500 Duramax

I have a 2006 GMC 2500 Duramax, it will not shut off even when I turned the key off and remove it from the ignition. Also when this happens the windshield wipers and headlights will not turn off ei...