2002 Z71 tune up at 200k

[MY8ZERO5]

I’m finally getting around to tuning up my Avalanche Z71 after owning it for over 6 years.
I want to do a full tune up I’m open to recommendations onto which product to use regarding, plugs, wires, coils, air and fuel filters.

 

[EXT4ME]

The list you have compiled is a good one.

But, if I may, the coils on these trucks are very good and will most likely outlast the truck.

Just changing them all out just for the sake of changing them is a huge waste of money, IMO.

If one coil can be determined to be bad due to testing, then change that one coil.

As for spark plugs and wire sets, I tend to stay with the OEM ACDelco parts and stay away from other aftermarket parts.

I like the top of the line NAPA filters for air, fuel and oil.

I like Mobil 1 5W-30 for my engines.

Although any good name brand oil should work fine for you.

I would not be tempted to change the viscosity of my engine oil based upon the fact the engine has aged and has some miles on it.

I have yet to see a chart in any owner's manual stating you should put a so-called "thicker" oil in your engine as it ages.

My 2003 Z-66 has 258K and my 2004 EXT has 236K and both engines use the same oil I have always used.

I'm also not a big fan of oil additives since it has been proven that adding anything to a fresh install of engine oil will dilute the additive package already in the oil and will change the viscosity of your multi-grade oil to who knows what.

I think the company that developed the oil I use knows more about those things than I ever will and I trust their judgement.

I would not be so bold as to think I could makes things "better", so why bother.

Consider removing and cleaning both the Mass Airflow Sensor and the throttle body and use the appropriate cleaners from CRC for each.

Some have reported changing out all of the O2 sensors on the exhaust system on engines with advanced mileage.

I can't speak to that since I have only changed those out when one goes bad, but I can see the reasoning behind that action.

Good luck with your repairs and enjoy the time you spend working on your truck.

 

[MY8ZERO5]

The list you have compiled is a good one.

But, if I may, the coils on these trucks are very good and will most likely outlast the truck.

Just changing them all out just for the sake of changing them is a huge waste of money, IMO.

If one coil can be determined to be bad due to testing, then change that one coil.

As for spark plugs and wire sets, I tend to stay with the OEM ACDelco parts and stay away from other aftermarket parts.

I like the top of the line NAPA filters for air, fuel and oil.

I like Mobil 1 5W-30 for my engines.

Although any good name brand oil should work fine for you.

I would not be tempted to change the viscosity of my engine oil based upon the fact the engine has aged and has some miles on it.

I have yet to see a chart in any owner's manual stating you should put a so-called "thicker" oil in your engine as it ages.

My 2003 Z-66 has 258K and my 2004 EXT has 236K and both engines use the same oil I have always used.

I'm also not a big fan of oil additives since it has been proven that adding anything to a fresh install of engine oil will dilute the additive package already in the oil and will change the viscosity of your multi-grade oil to who knows what.

I think the company that developed the oil I use knows more about those things than I ever will and I trust their judgement.

I would not be so bold as to think I could makes things "better", so why bother.

Consider removing and cleaning both the Mass Airflow Sensor and the throttle body and use the appropriate cleaners from CRC for each.

Some have reported changing out all of the O2 sensors on the exhaust system on engines with advanced mileage.

I can't speak to that since I have only changed those out when one goes bad, but I can see the reasoning behind that action.

Good luck with your repairs and enjoy the time you spend working on your truck.

Thank you!

I was considering purchasing a set of “high performance” coils and wires I found on amazon. However after reading your feedback I’m reconsidering it completely.