mrfarb

Let me tell you, I owned a 21 RST Z71 LM2 for 2 years and put about 80k miles on it, loved that truck but had a persistent CEL that wouldn't stay off (IMO was a harness issue dealership could never fix). I traded it for a 23 trail boss with LZ0 and have about 25k now. I use the truck consistently for work doing lots of highway mixed with city/slow parking lot driving. Used both trucks exactly the same. LM2 seemed quicker off the line, felt peppy. LM0 not as much. LM2 I could get 3 days before having to fill up (would maybe have 1/8 tank of fuel left). Averaged 22.8 mpg I think lifetime. LZ0 I get 4 full days of work before fill up (with 1/8 or less left), so I get a full extra day of driving. I think the lifetime average is 24 in that truck, but real world to me is how often I fill up. Best ever 50 mile average for both was 37.1 MPG, took months to achieve in the 21, took less than a week in the LZ0. LM2 was ultra quiet - LZ0 has more "diesel" sound but still quieter than a 6.5 Diesel. My personal opinion, the EGR/Emissions system on the LM2 was flawed and completely changed in the LM0 for a reason. That may be bias as that is the trouble I always had with my LM2. Given the choice, spend just a tad more and get the new motor.

Maybe the new AT4X? My 23 Trail Boss has white running lights that turn orange for turn signal and when flashing - haven't tried using them as running lights.

Well, I had a 21 RST with Bose, got a 23 LT Trail Boss with non-Bose, its a huge disappointment with that downgrade.

Bought mine in Dec with Employee pricing, Z71 4x4 RST Duramax. Was nervous about the Duramax, but 2nd year model seems to be safe. So far I have put about 26,000 miles on it. My lifetime average is 23 MPG, but I do a lot of city driving. Best 50 mile average is an incredible 36.7 MPG coming from Louisiana to Houston with cruise set to 65. I was stunned! While I do city driving a lot in Houston, I do some highway driving too. This is the smoothest, best running truck I've owned. I don't tow anything, or even drive off road much, but when I need 4x4, I need it. I'm a high mileage guy, the 150,000 mile oil pump belt inspection/service is odd to me, but I once put 400,000 miles on a 2005 I5 Colorado so I know how to make them last. But, i'm with 6sigma, when the 22/23 refresh comes I may just trade it in on a new one!