2006 GMC Sierra 2500 HD Reviews and Owner Comments

2006 GMC Sierra 2500 HD owners review and rate their 2006 GMC Sierra 2500 HD.

2006 GMC Sierra 2500 HD (3 Reviews)
Body, Interior & Misc.
Drive Train
Electrical & Lights
Exhaust & Emissions
Heating & Air Conditioning
Suspension & Steering
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After buying a new 26' travel trailer we decided to trade in the 2002 1/2 ton Sierra and get a brand new 2006 Sierra HD 2500 SLT 4x4 with the 6.6 Duramax Diesel,6 speed Allison and went crew cab this time. What a difference that made in pulling the trailer. I can go from Phoenix to Flagstaff with the cruise control on pulling the trailer holding 65 mph (as long as I have an open lane). I had test driven the Ford Super Duty and the Dodge before I bought this GMC. At the time the GMC had the most horsepower and torque 360/650. I liked the cab space of the Ford but that was it. The Dodge seemed to plasticky and plain even in loaded form, even though it had lots of storage cubbies and stuff. So since I had a GMC before I went with it again. I have replaced the 2 batteries twice (batteries don't last long in AZ) and tires 3 times. The factory tires and rims on these HD's are ugly and skinny, it makes the truck look like Grand Dad's, so I put on 18" Moto metal rims and some nice BFG All Terrain T/A K/O 285/65/18 tires, with some Westin nerf bars, a Rhino liner and a Lund bug shield and added an AIRRAID intake. I also tweaked the torsion bars on the front suspension so the truck looks level instead of dipping down in the front. That may have cost me some gas mileage because that truck has never seen anything better than 18 mpg and that was unloaded, downhill, with a tailwind. It does get better city mpg than my 5.3L '02 did. I get about 14 mpg, if I'm easy on it. When I pull my trailer though it's 9 or 10. These other people I talk to with the same truck that tell me they get 14-15 mpg pulling a trailer are full of it. My best has been 10 mpg maybe. Problem wise, I had to replace both wheel bearings at 75k miles (I have 84k on it currently), the a/c quit of course right when it was 112 outside, turns out it was the climate control box (dual control) some part went out in that. Had to have a steering box and p/s hoses replaced under warranty, otherwise that was it. The light bulbs are out on some of the steering wheel controls and the radio knobs all of the words are rubbed off. It has the Bose stereo and DVD player (which I play my Ipod through since there is no jack on the radio for an ipod)but today I tried a CD and they spit right back out. Probably because in 6 years I hardly played CD's, just mostly XM and my ipod. Otherwise the engine and trans are great and I've had no other problems. If you follow the scheduled maintenance, these trucks last a long time. I still have the original brakes and they still have 50% life in them (even after pulling a camper for 6 years). I don't like the '07 & newer ones. Less chrome and they have more emission control junk (cat box) and you have to pour stuff in the gas tank on occasion. Interiors are nicer though, but I don't want to shell out $50k again for a truck.
I bought june 2006 from now defunct dealer lawrence marshall. I drove it over every bumpy road i could find and didn't rattle at all. In september the doors started rattleing and the seats squeaking and noise from dash.The doors the worst,it make a noisy clacking and bumping every start and stop and on bumpy roads,they were able to fix only the seats . April of 2011 the dash stated making a steady bumping noise,internet research says it is A/C actuators.So at 45,000 milesit rattles like a 10 year old junker and i guess the A/C will fail whenever..Oh yeah,,the tail light assembly fell out of the left side in august 06 and the right one fell out sept 09,,only vehicle i have ever owned in 50 years that tail light fell out of voluntarily....ha!!
I really like mine. 8.1 has plenty of power and does as good on fuel as the 6.0. I had leaking oil cooler line that I had to replace outside of warranty. Other than that, its been a good truck. Only have 42k miles on it ytd.