My 2003 Trailblazer I just bought has 78,000 miles on it. I'm not 100% sure of the maintenance that the previous owner did, I know it was taken care of but I figured it might be good to change the fuel filter and change the plugs. I have changed the air filter and done an oil change so that is set. I know the fuel filter should be easy enough, I am just trying to figure out how difficult the plugs are to change, I have had some vehicles that it is easier to just pay to have it done. I am not a master mechanic but I have worked on cars from time to time so I am just wondering how much work is involved and how long it will take. Any suggestions from past experience would be great. I was also wondering what else you might suggest doing to to it. I am just trying to get it taken care of to prevent problems down the road.
Thanks in advance2003 Trailblazer tune-up advice?first of all, get that liftgate looked at.
the spark plugs on this vehicle are iridium tipped plugs and don't normally require replacement for 100,000 miles. i've done several tuneups on vehicles with 120,000 original miles on the plugs and they still look great! don't change the plugs unless you have to. the throttle body has to come off and the intake resonator. you have individual coil packs for each plug so there aren't any wires, and the coil packs don't require maintenance. your fuel system should be okay, but you can change the filter yourself. its in front of the fuel tank on the drivers side. you'll need a phillips #2 bit for the filter retainer. they use quick disconnect fittings on those so you won't need wrenches. also, have a professional technician look over your vehicle real good and have the dealership check for open recalls. the trailblazer had tons of recalls from general motors and they won't cost you a dime to do those recalls. that's all i can think of off the top of my head.
the exhaust camshaft phaser solenoid leaks oil past the solenoid and saturates the connector and wiring. it's gonna set a check engine lamp. i've done lots of those on the 4.2 inline 6. and some secondary air reaction check valves, they rust shut and set a check engine light.
let me know if you have any additional questions.2003 Trailblazer tune-up advice?plugs wires, fuel filter air filter (spend the money and get a k%26amp;n) oil change also run seafoam in the tank2003 Trailblazer tune-up advice?I'd bet the transmission maintenance has been ignored, most owners let it. It's just dump %26amp; wipe the pan and put in a new filter.Pull out 2 of the sparkplugs to see if they need replacement. Check %26amp; refill the rearend's gear lube. Get a 'Haynes' manual to familerize yerself with the car's requirements. =^ )2003 Trailblazer tune-up advice?Depends on the engine size. Chevy isnt too bad though2003 Trailblazer tune-up advice?The maintenance schedule should be in the manual, but the spark plug interval is usually 100K, the truck probably has double Platinum or iridium plugs. If I am not mistaken, the trailblazer is coil on plug, I don't think it has ignition wires.2003 Trailblazer tune-up advice?Plugs are good for 100K. Flush the Transmission, Rear Diff. and front Diff. and get ready for bad news I have seen many a bad bearing in the front differential of the trail blazer. Pinion seals leak also. Use
Synthetic 80-90w lube. in the diffs. do not forget the transfer case also.2003 Trailblazer tune-up advice?i would defiantly check the gearboxes you will need a #10 allen socket to check the t-case- make sure the fluids are clean the t-case should either be a blue green color or pink like the trans depending on the model- the transmission should be light pink if its dark get a heavy duty service- you need a ph strip to check the brake fluid but if it appears dark get that swapped out too- power steering should be light amber colored if its dark change it- im not so sure the 03 is going to have a fuel filter- it might. Spark plugs aren't bad you need to remove the upper plenum- once that's off its just a matter of taking the coils off and taking the plugs out the far 2 will be a bit tough but nothing special be extremely careful not to over-tighten the new plugs- cylinder heads suck on these! Also you should get a fuel injection cleaning done or use a good fuel additive every oil change- oh and coolant should be orange in color and should protect up to -40 if not get it flushed let me know if you have any questions.
