Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum banner
1 - 6 of 6 Posts

·
Registered
2003 chevy trailblazer_lt
Joined
·
11 Posts
Discussion Starter · #1 ·
Hello,

I've looked through some other threads and have gotten bits and pieces. My 2003 Chevy Trailblazer is approaching 100k miles (96k at the moment). I was wondering what I need done. Here's what's been done:

I have replaced air filter every 15k
I have changed the fuel filter every 30k
Transmission Flush was at 78k
Coolant Flush was at 57k

-I'm guessing change the spark plugs
-Still have the original serpentine belt
- Differential Fluid change? (not sure what this is/does)
- Once a year I put in the techron fuel additive in. Should I have my fuel injectors cleaned?
- Power steering fluid changed?

Thanks
Quaf
 

·
Banned
2003 chevy trailblazer_lt_ext
Joined
·
771 Posts
4 Wheel drive or 2? Fill out your profile it will help us help you.
Serpentine belt,
Clean Throttle body
Plugs
Fuel filter if due, same for air
Transmission filter ond oil changed,
Front Rear differential oils
Transfer case oil 4Wd
Check Sway bars links and bar bushings.
Check Shocks/Struts

You can also check for your manual in the resources section at the top.
 

·
Registered
2003 chevy trailblazer_lt
Joined
·
425 Posts
4 Wheel drive or 2? Fill out your profile it will help us help you.
Serpentine belt,
Clean Throttle body
Plugs
Fuel filter if due, same for air
Transmission filter ond oil changed,
Front Rear differential oils
Transfer case oil 4Wd
Check Sway bars links and bar bushings.
Check Shocks/Struts

You can also check for your manual in the resources section at the top.

:iagree::iagree:
 

·
Registered
2003 chevy trailblazer_ls
Joined
·
5,268 Posts
Coolant Flush was at 57k--- A little early--- but ok.

-I'm guessing change the spark plugs= Yes- use ACDELCO.
-Still have the original serpentine belt- change that- its easy
- Differential Fluid change? (not sure what this is/does)- the lubricant in the rear end.
- Once a year I put in the techron fuel additive in. Should I have my fuel injectors cleaned? If youre getting good mileage- then I would skip the injector cleaning- and maybe run techron 2 times a year- maybe 3
- Power steering fluid changed? You can flush it all out-- or use the turkey baster method- suck out the stuff in the reservoir- and refill- drive fora few days- then suck out- refill, drive for a few days, suck and refill...untill the fluid comes out somewhat clear
This is the way Ive done it since new. I do this maybe once a year..
once of those things- were a bottle of the fluid will last a few applications.
 

·
Registered
2005 chevy trailblazer_ls_ext
Joined
·
2,667 Posts
Coolant Flush was at 57k--- A little early--- but ok.
Remember - as I stated the other day - it is 5 years or 150K miles, not just 150K miles!
Having an 03, he is obviously past the 5 year mark! Since I was replacing the thermostat I changed mine at about 52,000 miles, about 6 months shy of 5 years.
 
1 - 6 of 6 Posts
Top