137k Mile Maitenance

[Denalixl13]

Hey guys, my 06' Yukon XL Denali is at about 137k miles, it's due for its annual inspection this month and I wanted to get some stuff done to it, does anyone have recommendations?

I'm doing my spark plugs, any suggested brands?

And also when my transmission shifts into 2nd gear, there is a slight hesitation, the rpms boost a little above normal, should I do a fluid change? Or perhaps add a thick additive?

Also, if anyone has suggestions on what else I should do, please let me know!

Thanks!

 

[gdddup]

go with the oe ac delco plugs n wires. maybe a new fuel filter and or use some seafoam.
for the trans change the fliud n filter

 

[Denalixl13]

Okay thanks! Nice ride!

---------- Post added at 05:24 PM ---------- Previous post was at 04:55 PM ----------

Oh, one more thing, why the OE AC Delco plugs and not like the Bosch Iridium pulse plugs?
And should I switch to Dexron 75000 mile transmission fluid?

 

[gdddup]

i like to put the oe stuff back when i can...not sure about the bosh iridiums.
n your 06 might require dexron vi... check your dip stick

 

[Denalixl13]

Okay, will do!