ok guys i worked firestone and this is what i personally told alot of people and theyve come back to me andsaid their car is in best condtion then ever before.
Engine - I live in arizona and tell people 10-W30 in winter and 10-W40 in the summer. best oil to use depens on the mileage on ur motor. 75,000 and up high mileage for wear, 74,999 and below synth. blend for normal driving, full syth. for performace. Tune ups every 30,000, including pull plugs and look at wear, pull plug wires one at a time for wear and soft spots, throttle body cleaning at every tune up, fuel filter every other tune up, and rune something called Marvel Mysteru Oil in the tank. I use it on my 85 S-10 and that things carb is SOOOOOOO clean.
Oil additives - Lucas for performace since it thickens the oil slightly for better lube. Marvel oil for smoother, quieter motor and for motors that are just for getting around.
Tranny - Manual, 60,000 mile drain and fill. Auto, pull the stick regularly and smell. ANY differance get the trany flush and filter. If u have an aout, BAY THAT THING. if it goes down, ur looking at a major money dent.
4X4 service - Front and rear diff drain when u pull the fill and stick ur fingur in. if there is a color differance flush it. pull of the diff cover and check for metal shavings. The transfewr case should be flushed with the diffs, but some shops dont do that (Firestone doesnt)
Tires - on a blazer it should be 35 psi all around. have a pressure gauge in ur truck at all times. check in the moring cold for best reading.
Alingment - if it hasnt been done, get it check and have it aligned if it out. that and tire will be ur worst fuel enemy. after this check have it check once a year, twice if u live on rough dirt roads.
Battery - make sure that thing is clean and free of acid biuld up at all times. pop off the battery gaurds and check water regularly. Use dissiled. batt. that are taken care of and not put through high demand last 5-7 years. (mines 5 and still have full Cold cranking amps)
Brakes - if ur low on fluid, get the system inspected. (u have a leak somewhere, same with power streening) Pads usually last about 35,000 miles more with less braking and less with more braking. when u do pads, turn the rotor to ensure smooth braking. u can check pads ur self by taking off the tire using a nickle next to the pad. if the nickle dont fit replace them.
i know it lengthy but it will save ur motor and make it last past 300,000. just baby the truck and it will love u