Hey everyone
I need some good input on doing the tune up for black beauty, aka the Tahoe. It's a 5.3 liter 2001 Tahoe with 124,000 miles on it. I always try and keep up with the oil changes, every 3-4 k I'll change it with Royal Purple 5w-30 and it runs like a champ. Me and my family will be heading to El Paso Tx in about a month so I wanna start working on her. It's a 13 hour drive and I want her to perform at her best. What do I need to get done for a good tune-up?
suggestions please!

Also I keep hearing about Iridium spark plugs, how do they compare to Platinums? What would you suggest?