Cheap Easy Tune Up

[onastick]

i have an 03 4.8 gmc extended cab with 91 000 km's.

i just bought the truck and love it.

is there any performance tips out there that won't cost 1000's of dollars and how to get a stronger rear suspension for carrying loads.

thanks

[GMCrazy777]

my dad and my uncle put a pair of air assist bags on the back of my moms 04 sierra 1500 and it doesnt sag and it makes towing a lot easier.

[nbscanuck]

what he said^^^^^

I've got Firestone air bags, I HIGHLY recommend them.