Tune up help

wanting to do a little tune up on a truck I just bought . It's a 2006 4dr 4x4 long bed sport. Need suggestions for plugs and wires ? Truck has 140k . What else should I do other then fluid changes ?

 

My rig runs great on these. OTC at AutoZone.

Maybe a serpentine belt along with the fluid changes

 

Do those plugs work on the 4.0? Will get the belt too great idea .

 

They went in this engine.

 

OEM denso coppers, There are no wires it's coil on plug.

Numerous threads on this site about this subject.

 

At 140k I would change all fluids: engine oil, coolant, trans fluid, t-case, differentials. Make sure you buy new crush washers for any drain or fill plug that you disturb. Air and cabin air filters. Bleed the brakes with new fluid. Clean the maf sensor. replace the drive belt. Grease all zerks. Run a bottle of fuel system treatment with the first few fill ups. I would baseline everything unless you know the full maintenance history.

From there replace anything that isn't working within spec (idler/ tensioner, wheel bearings, u-joints etc.)