2002-2009 Gmc Envoy/Chevy Trailblazer TuneUp!!!! (Sparkplugs,Fuel Filter,Air Filter) 4.2L Vortec 

Ok, Haha, you did NOT show the number six removal and replacement; that was the most fun for me, short wobble socket extension, swivel and a few unkind words were required. But overall, you did the same routine, very helpful, thanks!

This is what my husband and I are using to change out my #4 spark plug for misfire. We will be changing the rest out next week when I get paid, as well as the coils. I hope this makes her run smooth again until then. I have no choice but to drive to and from work, so this is a bandaid until next week. Thank you!

Glad i found this video. I am going to do a tune-up on my wife's 2004 Envoy XUV. Was going to buy her a new SUV but she loves the XUV and it has been a great vehicle. Just started running a little rough lately, but we have had it over twelve years and never had a tune-up. Always changed oil, but it ran so good i just never tuned it up. I know, that's pretty bad. Thanks again, i just subscribed.

Excellent and explicit video i have a gmc envoy and some tips help save money...

Good video the music is dope appreciate sharing knowledge ima do mine now

Drops his smoke down spark plug one..... would have been a great plot twist! Thanks for the vid. Doing mine tomorrow.

Great video man. I just recently bought a 2006 Chevy Trailblazer LT with the 4.2. Has 164,000 miles on it. Still runs like a new vehicle.

Thanks again Kenny !

Had a problem where I couldn't get over 50mph without severe hesitation/vibration. So today I changed out the spark plugs plus all 6 coil packs. My Envoy is 3 weeks shy of 19 years old. It's back to running smooth after that. Tomorrow I will be changing the fuel filter. They pay for themselves. In the beginning you pay less for a full tank of gas. It covers the cost of the filter and then some. I'll be changing the air filter, transmission filter/fluid also. In 19 years this will be my 3rd time changing the transmission filter and fluid. I remember after the first I thought to myself this was a one time deal. Well who would have thought a vehicle would last 19 years.

I inherited my mamma's 02 Envoy 3 years ago.. Love and miss you ma! mamma..Has 280 , 000 miles on it and runs beautifully.. Awesome power.. removed the muffler.. sounds sweet..I'm 65 going on 18..lol..I refuse to grow up..lol.. Same color as yours and I keep it detailed.. Paint is awesome.. Daddy.Rip..kept it up as do I.. Doesn't use any oil as the 4.2 was one of GMs good motors ad was the transmission..I am going to lower the rear end as they are top heavy

Did you only do 5? How about showing us how you got to the knuckle busting #6?

Great vid and I like the music

Great video

My bolt broke inside the head on my number 4. It's been about 10 years since that happened but i'd really like to get it drilled out. It's loose fitting. Vehicle runs fine though.

Nice music.

Where did you get it fuel filter? Can't find it at auto zone and rockauto doesn't have a listing for fuel filters?

arent the threads of the plugs supposed to be lubed up or something like that idk just wondering...

How hard is it to get the last plug out? I have an 03 envoy, and I'm wanting to do a tune up on it, but my hands don't really allow me to work in really tight spaces...

Did you skip the plug near the firewall?

My #3 coil is broke in half how do I get the bottom part off of the plug?

How many sparks plugs need replaced ? If doing all at once? I want to work on my gmc envoy 05 this week as well. Good video!

Man no one ever shows that last one in the back lol, I'm trying to figure it out. I feel like my extensions are too long

Did you have to gap sprak plugs

What about ignition coils bro?

You didn't do the plug under the windshield I know it takes a little longer but it can be done go back and do it then shoot the video correctly

Awesome

You didn’t show putting in that last spot plug

What is the gap supposed to be?

How’s it run with those autolite plugs?

Why would you smoke over an open engine?

Hard to hear over the loud music

That dang Envoy always getting worked on.

Didn’t show the most important one…..the last oneeeeeeee

Be a real mechanic and show a video of changing the fuel injectors.

lose the music

who uses autolites....garbage

Music sucks, and is quite distracting. Please stop.