Used the 'new' Sierra to tow the travel trailer to a nearby dealership (awning recall, couple of other warranty items). Trip was only about 15mi, per Google, but at least I got a little taste to see what the load would be like.
- Even though I've got a 4.10 in this truck, vs. a 3.73 in the other...and it's been a good 4-5 mos since I pulled it with that one (again, only for a short distance)...it seemed to me like the other truck pulled the trailer slightly easier (?) Maybe it was the Flowmaster - b/c you definitely heard the engine as it pulled past 3K. Ordering a quieter replacement is next on my list. And I know using the tow/haul button contributes to this, since the shifts are held longer, etc.
- iMPG showed 8mpg at 40-45mph cruise. Ain't gainin' nuthin' here over the Voy
(admittedly, I'm pulling about 1500lb more than the old trailer weighed).
- I
definitely am going to do the cam swap, once the other Sierra sells (ugh...another story). Decided after seeing the intake ports on this truck's heads (when I did the intake gaskets) that I was going to grab a set of heads & rebuild them, since I was going to pull the heads anyway to install new lifters. Looking at the same 317s for now; thought about 799s / 243s, but I don't want to bump the compression too much. You did see "8mpg", right?
I don't want to have to use 93 octane for those 8mpg.
Something tells me FI is going to be a future project; maybe next summer (2020). Or I start learning about maintaining a pre-DEF DMax (for torque, not mpg.)
Not afraid of stepping on the go pedal with this one, and it didn't 'struggle'...but whomever said "pulls like nothing was behind it"... I
knew I had +6000lb on the ball. No question about that. Same as the other Sierra, though...I can't badmouth this one for that. Didn't engage the 4WS in tow/haul, since that mode is really for highway speed maneuvering. Will wait till I get on the superslab for that.
- The trailer sits a little nose-high, hitched to this truck. I'll probably have to make an adjustment on the shank / stinger, dropping the ball down one 'notch'. Another difference vs. the old truck. I'm sure the 17's I have on this one contribute to that. Oh, well...better 'high' than 'low'.
- Coming to the realization that something heavy was dropped in the bed at some point -- the tailgate shows evidence of it, and today I put together the idea that, yes, the top of the bed (at the cab end) seems farther away from the cab than the bottom of the bed -- or at least farther away than the other Sierra's bed / cab are. I'll have to check this out in more detail later (but I haven't seen any evidence of a bent frame underneath, etc.)
If the truck had a gooseneck / fifth wheel hitch in the bed, I'd almost say that someone had the front end of a 5'er drop on the tailgate / hit the bed. But it's never had either of those installed. Since the truck has a set of bags on it, it's almost a certainty that it was hauling / towing some serious weight in a past life. Scratching my head, for now.