2007 Trailblazer tune up? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CG · 10-03-2014, 11:48 AM

Well I hate working on any of the new vehicles, but its time to tune the wife's Trailblazer.

So you guys with experience tell me what I need to pick up to give it a tune up. Its the 6 cyl version. Plugs, what else? O2 sensor? There is a check engine light on. I could probably take it over to Napa and have them tell me what the light is. Did I mention I hate working on new stuff?

95 S_Trucker · 10-03-2014, 03:46 PM

Tune ups on those are pretty easy. Just spark plugs and an air filter. I would highly recommend ac delco double platinum or iridium plugs.

CG · 10-03-2014, 09:43 PM

Quote:

Originally Posted by 95 S_Trucker

Tune ups on those are pretty easy. Just spark plugs and an air filter. I would highly recommend ac delco double platinum or iridium plugs.

Well that's nice to hear. Ill probably change the oil too long as Im crawling around =)

**LEEVON** · 10-03-2014, 10:08 PM

Yep, plugs, air filter and fuel filter. These chew up coils. Let me know what your code turns out to be.

dieseldawg142 · 10-04-2014, 01:14 AM

Quote:

Originally Posted by LEEVON

Yep, plugs, air filter and fuel filter. These chew up coils. Let me know what your code turns out to be.

have'nt had any coil probs with the wife's envoy, but the t-stats keeps sticking open. changed it twice & it's kickin' out code 128, AGAIN!....
yup, give me old...

IIGW · 10-04-2014, 09:12 AM

Plugs, filters, then take it to your local dyno-tuner to reprogram the computer to really make it feel like you did an engine swap. If you are on a ‘stock’ computer tune you are missing so much..

CG · 10-04-2014, 11:19 AM

Quote:

Originally Posted by IIGW

Plugs, filters, then take it to your local dyno-tuner to reprogram the computer to really make it feel like you did an engine swap. If you are on a ‘stock’ computer tune you are missing so much..

This is just a plain jane 6 cyl would this really make a difference, and what does something like this cost?

It has 130K on it.

cdowns · 10-04-2014, 12:20 PM

did you run a few cans of seafoam thru it lately?great for cleaning injecxtors and sometimes it solves the engine lights too

463 · 10-04-2014, 01:48 PM

There is NO fuel filter to replace. Pull that of the list.

CG · 10-04-2014, 02:40 PM

Quote:

Originally Posted by cdowns

did you run a few cans of seafoam thru it lately?great for cleaning injecxtors and sometimes it solves the engine lights too

Ive heard of seafoam but Ive never used it. Ill look it up online and check it out.

hd74 · 10-04-2014, 04:12 PM

yhe fuel filter is in the tank,leave it alone

CG · 10-04-2014, 05:46 PM

Changed the oil, oil filter, air filter. Washed and vacuumed. Filled up the tank and added a can of the Seafoam. Had the code checked and it was something about the catalytic converter, reset the code. Put in 5 new spark plugs. Cant get the rear most one out, its way under the stupid cowl. Ill figure it out later =) Put on new wiper blades. I think she is ready for winter.

dieseldawg142 · 10-04-2014, 07:50 PM

Quote:

Originally Posted by hd74

yhe fuel filter is in the tank,leave it alone

do the 07's have it in the tank? my wife's '04 f.filter is mounted on a bracket at the front of the tank, on the outside

68C15 · 10-05-2014, 10:40 PM

Get that rear plug changed. I use a shallow socket with a 3" extension all in 1/4" variety then after it's unthreaded use a piece of 3/8" fuel hose to pull it out

P0420- cat conv efficiency low, bank 1. It may need scanning to see if converter is weak or if upstream O2 is slow mimicking the downstream sensor. It wouldn't be the first time I've seen a gm converter fail. I don't have proof but I suspect it's small amounts of dexcool leaking into cylinders and killing converters

IIGW · 10-06-2014, 01:50 AM

Quote:

Originally Posted by CG

This is just a plain jane 6 cyl would this really make a difference, and what does something like this cost?

It has 130K on it.

makes a big difference.

not sure in your area on cost, can be $50-250. last one i had done cost me a 5th of jack.

should look into it.

CG · 10-06-2014, 11:46 AM

Quote:

Originally Posted by 68C15

Get that rear plug changed. I use a shallow socket with a 3" extension all in 1/4" variety then after it's unthreaded use a piece of 3/8" fuel hose to pull it out

P0420- cat conv efficiency low, bank 1. It may need scanning to see if converter is weak or if upstream O2 is slow mimicking the downstream sensor. It wouldn't be the first time I've seen a gm converter fail. I don't have proof but I suspect it's small amounts of dexcool leaking into cylinders and killing converters

Thanks for this ... some good tips!

10-03-2014, 11:48 AM	#1
CG BlahBlahBlah Join Date: Feb 2002 Location: Monroe, Wa. Posts: 19,779	2007 Trailblazer tune up? Well I hate working on any of the new vehicles, but its time to tune the wife's Trailblazer. So you guys with experience tell me what I need to pick up to give it a tune up. Its the 6 cyl version. Plugs, what else? O2 sensor? There is a check engine light on. I could probably take it over to Napa and have them tell me what the light is. Did I mention I hate working on new stuff? __________________ … … … … … … … … ... … … … … … … … … … … … Monroe Swap meet May 18-19. Mike has the same spots for the NW guys he's had forever. Lunch time BBQ at the spaces. If you have stuff to sell bring it along. If you have a question PM stllookn (Mike) here via the board. https://67-72chevytrucks.com/vboard/...d.php?t=851291

10-03-2014, 03:46 PM	#2
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,178	Re: 2007 Trailblazer tune up? Tune ups on those are pretty easy. Just spark plugs and an air filter. I would highly recommend ac delco double platinum or iridium plugs.

10-03-2014, 10:08 PM	#4
LEEVON Registered User Join Date: Jul 2006 Location: Ozark, MO Posts: 4,887	Re: 2007 Trailblazer tune up? Yep, plugs, air filter and fuel filter. These chew up coils. Let me know what your code turns out to be. __________________ '20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids

10-04-2014, 09:12 AM	#6
IIGW Registered User Join Date: Jul 2014 Location: phx az Posts: 317	Re: 2007 Trailblazer tune up? Plugs, filters, then take it to your local dyno-tuner to reprogram the computer to really make it feel like you did an engine swap. If you are on a ‘stock’ computer tune you are missing so much.. __________________ tubbed 1984 gmc jmmy http://67-72chevytrucks.com/vboard/s...d.php?t=639738 Alice Hombre http://67-72chevytrucks.com/vboard/s...d.php?t=808454

10-04-2014, 12:20 PM	#8
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: 2007 Trailblazer tune up? did you run a few cans of seafoam thru it lately?great for cleaning injecxtors and sometimes it solves the engine lights too __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

10-04-2014, 01:48 PM	#9
463 Registered User Join Date: Nov 2007 Location: Sask Canada Posts: 1,666	Re: 2007 Trailblazer tune up? There is NO fuel filter to replace. Pull that of the list. __________________ Trueman

10-04-2014, 04:12 PM	#11
hd74 Registered User Join Date: Jun 2009 Location: shellman bluff,ga Posts: 250	Re: 2007 Trailblazer tune up? yhe fuel filter is in the tank,leave it alone

10-04-2014, 05:46 PM	#12
CG BlahBlahBlah Join Date: Feb 2002 Location: Monroe, Wa. Posts: 19,779	Re: 2007 Trailblazer tune up? Changed the oil, oil filter, air filter. Washed and vacuumed. Filled up the tank and added a can of the Seafoam. Had the code checked and it was something about the catalytic converter, reset the code. Put in 5 new spark plugs. Cant get the rear most one out, its way under the stupid cowl. Ill figure it out later =) Put on new wiper blades. I think she is ready for winter. __________________ … … … … … … … … ... … … … … … … … … … … … Monroe Swap meet May 18-19. Mike has the same spots for the NW guys he's had forever. Lunch time BBQ at the spaces. If you have stuff to sell bring it along. If you have a question PM stllookn (Mike) here via the board. https://67-72chevytrucks.com/vboard/...d.php?t=851291

10-05-2014, 10:40 PM	#14
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	Re: 2007 Trailblazer tune up? Get that rear plug changed. I use a shallow socket with a 3" extension all in 1/4" variety then after it's unthreaded use a piece of 3/8" fuel hose to pull it out P0420- cat conv efficiency low, bank 1. It may need scanning to see if converter is weak or if upstream O2 is slow mimicking the downstream sensor. It wouldn't be the first time I've seen a gm converter fail. I don't have proof but I suspect it's small amounts of dexcool leaking into cylinders and killing converters __________________ Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card



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