Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum banner
1 - 14 of 14 Posts

· Registered
2004 chevy trailblazer_ls_ext
Joined
·
58 Posts
Discussion Starter · #1 ·
I bought an 04 Trailblazer (EXT LS 4X4, 4.2L) and will take delivery next weekend. It has low mileage (32K) and I'm not sure how many details I will get regarding it's maintenance history.

So what do you recommend I inspect and/or replace? (I'll give the belt, hoses, filter, fluids, brake pads, etc. an inspection.)

I plan on replacing the fuel filter and from reading on this forum, cleaning the throttle body. I'm an "over-maintenance" guy and will probably put new spark plugs in even if it's not necessary yet. (AC Delco Iridium okay? I don't want to pay out the nose for the dealership double platinums if I can't help it.) I will probably replace the fan belt regardless of how it looks just so I know how what I have. (Gatorback okay?)

What else to you recommend I inspect or replace?
Thanks.
 

· Registered
2002 chevy trailblazer_ltz
Joined
·
3,321 Posts
I bought an 04 Trailblazer (EXT LS 4X4, 4.2L) and will take delivery next weekend. It has low mileage (32K) and I'm not sure how many details I will get regarding it's maintenance history......
Just wondering....did you buy it from a dealer, or private? In any case, you should ask (demand?) a CarFax report from the dealer, or get one yourself if from a private party.

As for the belt, the Gatorback is a good belt.

As for the plugs, I'd wait and see how it runs.....or maybe pull a couple plugs and have a look at them. If they seem clean and just have the normal carbon and tan porcelain color, I'd leave them. The plugs in this engine are good for at least 100K, unless there's other problems.

Good luck
 

· Registered
2004 chevy trailblazer_ls_ext
Joined
·
58 Posts
Discussion Starter · #6 ·
I'm buying it from my father-in-law so I could't pass up the "relative" discount even though I wasn't in the market. The reason I say I don't expect a maintenance record, my father-in-law is one of those bare-bones maintenance kind of guys. (Changes the oil timely but not much beyond that.)
 

· Premium Member
2007 chevy trailblazer_ls
Joined
·
1,456 Posts
Sounds like you got it nailed. I do the same thing as you and I changed all the driveline fuids for peace of mind. Five years max for the dexcool.
:iagree: Its a good idea to change the driveline fluids (oil, trans, coolant, diff and transfer case) A little money now especially with the relative discount on the purchase:) can give you piece of mind. As for the plugs I agree wait and see how she runs after cleaning the throttle body. They are pretty easy to do if you need to. Also it would be wise to check the air filter and maybe upgrade to the Amsoil filter. I really like it. Good luck
 

· Premium Member
2007 chevy trailblazer_ls
Joined
·
1,456 Posts
One other thing to look at is the battery, is it the original?
 

· Registered
2004 chevy trailblazer_ls_ext
Joined
·
58 Posts
Discussion Starter · #11 ·
I doubt the battery is original but my father-in-law can fill me in on that. I read somewhere its' a 30 minute job to replace. Wow.

Plan on looking at the brake pads. Probably pick up a K&N air filter for it as well.
 

· Premium Member
2007 chevy trailblazer_ls
Joined
·
1,456 Posts
:m2: Go with the Amsoil filter EAA204. I think its a better filter and cheaper to boot.
 

· Registered
2004 chevy trailblazer_ls_ext
Joined
·
16 Posts
Check out the Front Transfer Gear Box

I bought a used one of same type and mileage in 2007. In 2008, just after dealer warrantee expired but under extended warranty (self-purchased) the front power transfer gear box was found to be leaking fluid during routine oil changes. Always wet too far aft of the oil drain port and too high up. I thought it was an oil seal or pan seal. Trusted mechanic looked and said no-way too tough a job! Sent me to the local good transmission & drive train guy. Was a $1500+ bill, all case and bearing seals replaced. (warrantied ;)).
 

· Registered
2004 chevy trailblazer_ls_ext
Joined
·
58 Posts
Discussion Starter · #14 ·
Update..Picked up my '04 TB

Well I took delivery of my father-in-law's TB yesterday. 34,800 miles. First off, I have to apologize for all you TB owner's out there. This one was a little neglected.

The tires, battery, belt, fuel filter, trans. fluid, and coolant are all factory original. It's not that the truck was abused but it just wasn't used much in the last five years and preventive maintenance wasn't on my father-in-law's priority list. (I guess you can say that's a complement to the factory parts.)

Today I was able to put on a new belt and new fuel filter. I also cleaned the throttle body. (It really wasn't too dirty.) Tomorrow I plan on changing the coolant. The temp. gauge seemed to be running higher than it should. Probably the Dex-Cool has lost it's effectiveness. I'm going with new upper/lower hoses & thermostat while I'm at it.

Overall, the truck is in great shape and I should see many miles of road with it. The only minor thing I noticed is that there is a small oil leak around the cam actuator solenoid. I'll post a thread down the road when I want to deal with that.

Thanks for everyone's input.
 
1 - 14 of 14 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top