2021 Active AWD. 90k Bought 6/2020
Regular maint on trans/oil changes/rad fluid.
Walnut blasting on valves
Got 88k out of orig tires, and they were still in safe tread range when replaced.
STILL on orig brakes, checked every oil change, not needing changed out yet but close.
Had Evap unit replaced.
Rear awd unit needed a reflash.
THAT'S IT.

 

Thanks for the feedback! Congrats on reaching the 90K mark with no major issues.

How many miles did you have when you did the walnut blasting? And were you able to get a good view of the valves before and after the walnut blasting?

Can you provide more details on what this rear AWD unit reflash is all about, whether a code suddenly appeared and at what mileage did it occur and if it was covered by warranty?

Thanks

 

I had dealer do my walnut blasting. I had to have my rear awd unit reflashed because it was acting up, not engaging correctly. Not a common issue at all.

 

Thanks for the additional feedback.

How many miles did you have before you did your walnut blasting?

Any recommendations in terms of miles on when someone should do walnut blasting, before it gets so bad that engine codes start popping up? Might be a tough question to answer, since driving patterns and environments differ between each driver, but any guidelines you can share would be appreciated!

 

I'm not quite at 80k yet, but at ~75k generally follow the severe maintenance schedule in the manual for my 2021 LT AWD. Only thing to note, contrary to others' apparent experience, is that my factory tires (Continentals) wore out disappointingly early with only around 35k miles on them. Since, I've been using Bridgestone Weatherpeaks that have been excellent.

 

Thanks for the feedback!

I hear great things about the Bridgestone Weatherpeak All Weather Tires, especially on their winter performance.

How's the tread wear so far after about 40K miles, and are you driving them in all 4 seasons?

And what made you choose them over the highly popular Michelin CrossClimate2 or Goodyear Assurance WeatherReady 2?

 

The LT models back then got those tires if I recall. The Activ models did not. We rotated with every oil change and they were replaced at like 88k I think. HWY and City driving.

 

Here...

The 2021 Chevy Trailblazer ACTIV came with Hankook Dynapro AT2 (RF11) 225/60R17H tires as its stock, all-terrain option, designed for a blend of off-road traction and on-road capabilities

 

2021 Trailblazer purchased June 5 of 2020. 141,000 KM
Been doing oil changes as per driver data but at 20+%. Air filter same.
I should get on the 9speed and diff oil changes.
We have Been having this funky glitch thru speakers every so often since new, less so as time goes on.
At the three year mark the battery went low and it was dead in driveway doing its own thing. Random wipers/stereo blah blah. Fresh battery=good as new.
I too was disappointed in the Continental tires. Then also with a set of winters that lasted two seasons(make that two sets winter).

So this winter it gets BFG trail terrains.
While picking up winter rims
Yesterday I had a stumble/stall like thing go on and engine light. It later went off after a couple starts.

Been real good outside of the couple issues.

 

Thanks for the feedback!

Keep us all posted on your stumble/stall issue if it happens again. Maybe get a cheap OBD2 code reader to see what engine code error is generated, if it happens again.

 

Double post there

 

Almost got 90k out of the Hankooks that came on our active. It still have some tread to go but changed them out anyway.

 

I’m at 87k with original Hancooks on 2022 RS. They are not quite worn to the wear bars but close. I’ll replace them very soon.

 

Thanks for the feedback!

What's your maintenance routine, driving conditions/environment and any issues you experienced on your journey to 87K miles? Thx!

 

Thanks everyone who has posted so far with their Trailblazer's mileage and your various experiences.

Just did a quick search for "miles" and found a few more posts from other members with >80K miles.

@MrNick86 would you be able to help kindly share your latest miles and experiences since your last reported 173K miles? (very impressive BTW!)

@rspeet would you be able to help kindly share your latest miles and experiences since your last reported 133942 miles? (also impressive!)

@Jsierko would you be able to help kindly share your latest miles and experiences since your last reported 96000 miles? (hope you were able to get your AC/heater blend door issue fixed!)

@DCecil21 would you be able to help kindly share your latest miles and experiences since your last reported 78K miles, as I'm assuming your have >80K since then (congrats on your "new" scarlet Trailblazer RS BTW!)

Thx!

 

A walnut blast should be performed on a modern Trailblazer when you notice symptoms of carbon buildup, since its engines use gasoline direct injection (GDI). A typical preventative schedule for GDI engines is every 30,000 to 50,000 miles.

Symptoms that indicate a need for walnut blasting
Watch for these signs, as they suggest carbon deposits are restricting airflow and harming engine performance:

• Rough or shaky idling: The engine may feel unsteady, especially when it's cold.
• Engine misfires: The vehicle may stutter, particularly during startup.
• Loss of power: You may notice slower acceleration or a feeling of sluggishness.
• Decreased fuel efficiency: Poor combustion caused by carbon buildup can lead to a noticeable drop in your miles per gallon.
• • Engine pinging: You may hear a knocking sound, especially when accelerating.
  • Check engine light: A buildup of carbon can trigger various error codes.
  • Extended cranking time: The engine may take longer to start.

Why modern Trailblazers need walnut blasting
Older, port-injected engines had fuel sprayed over the intake valves, which kept them clean. However, newer Trailblazers use GDI technology, which sprays fuel directly into the combustion chamber. While this improves fuel economy, it means fuel no longer cleans the back of the intake valves, allowing carbon deposits to build up from oil and other contaminants.

Factors that affect the need for cleaning
The interval for cleaning can vary depending on your driving habits and engine type:

• Driving habits: A vehicle driven for short trips or with prolonged idling can accumulate carbon faster. Cars that regularly get up to full operating temperature and have their RPMs varied tend to have less buildup.
• Engine size: Modern Trailblazers typically come with either a 1.2-liter or 1.3-liter Ecotec engine, both of which are GDI and susceptible to carbon buildup over time