What to upgrade at 160K?

[JesusArTorres]

THIS THREAD WILL SERVE AS INFO ON MAINTAINING MY TRUCK AS WELL AS A REFERENCE FOR MYSELF.

I have a 2003 Yukon SLT 5.3 with almost 160K miles on it, what are some things that are recommended to be replaced to keep it running well?

SERVICE PARTS IDENTIFICATION
116.0 FJCVDZ TK15706
AG1 AG2 AJ1 AJ7 AL0 AN3 AP9 ARL AS3 AT5 AU0
AXP A31 BVE B30 B58 B85 CJ2 C25 C36 C49 C5H
C69 DF5 DH2 DK7 DL3 DT4 D07 EVA E52 FE9 FK2
FK3 GT4 G65 G80 JC4 JF4 KG3 KNP KUP K34 K47
L59 M30 NF2 NP5 NP8 NZZ PDC PDF PDQ QC3 QMK
SAF SLM TFE T96 UC6 UE1 UG1 UK3 UK6 UQ7 U2K
VB3 VG3 VR4 VXS V1K V22 V54 V73 V76 XMK YD3
YD6 YE9 YMK ZMK ZM9 ZW7 ZY1 Z82 Z88 1SD 1SZ
50U 521 522 6XK 7XK
BC/CC U 8624 522
522

MFD BY GENERAL MOTORS CORP
08/02
GVWR GAWR FRT GAWR RR
3130KG (6900LB) 1633KG(3600LB) 1814KG(4000LB)
THIS VEHICLE CONFORMS TO ALL APPLICABLE U.S. FEDERAL MOTOR VEHICLE SAFETY STANDARDS IN EFFECT ON THE DATE OF MANUFACTURE SHOWN ABOVE.
TYPE: M.P.V.
MODEL: K15706
KPDX TIRE SIZE SPEED RTG RIM COLD TIRE PRESSURE
FRT P265/70R16 S 16X7J 240KPA(35PSI)
RR P265/70R16 S 16X7J 240KPA(35PSI)
SPA P265/70R16 S 16X6.5J 240KPA(35PSI)
F 538
T 153

Water Pump - October 2014
Murray Temperature Control (MTC CP5104) - $111.99 - http://goo.gl/Zj7jpS - Lifetime Warranty - Emailed Receipt 10/11/14

LED Tail Lights - April 2015
Spyder (Item Model #: ALT-YD-CD00-LED-RC) - $169.34 - http://goo.gl/d1Blu6

 

[JesusArTorres]

So, some things that I have read that are good to upgrade are CAI, Black Bear tune, exhaust system, air filter.

Any more?

 

[ezdaar]

Mods

Vette servo, Billet OD servo.
LT headers.
Powerbond UD pulley.
Big 3 Mod.
Install truecool Trans cooler and get laser cut brackets from guy on other website.. Links are already posted here at TYF.


Repairs, even if no codes are shown.

Fresh high volume high pressure oil pump.
New water pump with low drag ceramic bearings.
Replace knock sensors and blind tap the threads.
Replace front two 02 sensors.
Pull throttle body, clean it completely.
Clean MAF.
De-oil intake manifold an install a catch can.
Pull pushrods check for straightness, replace all with hardend if any are bent, even slightly, Clean each one to bare metal and roll on piece of glass to check for bends.
NGK TR5 plugs for typical tune, NGK TR6 if you want to really push some timing in your tune.



Check for wear, replace if needed on these.

Check U joints for play, Check trans output shaft for play if 2wd.
Idler arm.
Pitman arm.
Tierod ends.
Balljoints.
Control arm bushings.



all I can think of atm...


Those mods and repairs listed above will make a substantial improvement to your power and drive-ability..

 

[Nickn]

As mentioned above, clean the throttle body - i did this past weekend and it made a noticeable difference in my 03 Tahoe's performance. More pick up, throttle response, etc. I have about 189k on it.

Keep an eye on your transmission's shifting - my valve body is starting to wear, causing late/abrupt shifting 1-2 and sometimes 3-4.

 

[TxDrewski]

That coolant leak could be a sign of a head gasket, I had that problem and I ran an $80 dollar bottle of sealer through the system and that stopped my leaking.

Fuel Pump for sure.

 

[JesusArTorres]

Thanks for the advice guys!

I'm gonna go slow on these due to $$$, but they're on the list. The cleaning ones shouldn't be too bad though.

I don't want to splash too much $$$ the truck (unless necessary), I just want it to to run another healthy 100K.

I've read on here that a CAI is something to consider since air is very important to the engine. These are two that I read positive things on from here:

Airaid $350
http://www.amazon.com/dp/B004IARFB0...TF8&colid=36MVUTL6OKN4Q&coliid=I3SJR01EZCH1U4

Spectre $150
http://www.amazon.com/dp/B001DBVPY0...TF8&colid=36MVUTL6OKN4Q&coliid=I1TISQ6782OH5X

I've read the Airaid is AMAZING and the BEST. But $350 is a little steep for me. The Spectre seems a better fit for me and have read positively on. Any comments/suggestions?

If I do acquire this, is there something else I should upgrade as well? Like the air filter?

 

[Front Street]

I have the K&N, but Airraid has tested really well for HP & TQ increase.

Personally, I want to get a dry filter after having to clean my MAF sensor a few times after oiling the K&N. It's really not a big deal, but when you start having sensor issues and codes coming up it's nice to know the air filter isn't a possible cause.

Someone else can comment on the Spectre.

I'm not sure about your question about upgrading the air filter after getting a CAI as they are part of the CAI.

If you're going to for performance first, air intake and then exhaust output will be the most efficient. I had to replace my Catalytic converters at 140K, but that's because I live in MN where the weather hates SUV's. So if your CAT's are good do headers and a cat back exhaust system or custom system installed at a shop.

 

[ccapehartusarmyINF.(ret)]

if your vehicle has 160k miles you need to first work on the wear and tear before you start installing stuff like vette servos on a high mileage tranny
before you waste any money on one of these so called "cold air intakes"
go watch the cold air intake mythbusted video on youtube and read the comments its pretty funny how many people argue with a dyno

---------- Post added at 06:47 PM ---------- Previous post was at 06:45 PM ----------

cold air intakes mythbusted on youtube

Thanks for the advice guys!

I'm gonna go slow on these due to $$$, but they're on the list. The cleaning ones shouldn't be too bad though.

I don't want to splash too much $$$ the truck (unless necessary), I just want it to to run another healthy 100K.

I've read on here that a CAI is something to consider since air is very important to the engine. These are two that I read positive things on from here:

Airaid $350
http://www.amazon.com/dp/B004IARFB0...TF8&colid=36MVUTL6OKN4Q&coliid=I3SJR01EZCH1U4

Spectre $150
http://www.amazon.com/dp/B001DBVPY0...TF8&colid=36MVUTL6OKN4Q&coliid=I1TISQ6782OH5X

I've read the Airaid is AMAZING and the BEST. But $350 is a little steep for me. The Spectre seems a better fit for me and have read positively on. Any comments/suggestions?

If I do acquire this, is there something else I should upgrade as well? Like the air filter?

 

[PlazaEJ]

Mods

Vette servo, Billet OD servo.
LT headers.
Powerbond UD pulley.
Big 3 Mod.
Install truecool Trans cooler and get laser cut brackets from guy on other website.. Links are already posted here at TYF.


Repairs, even if no codes are shown.

Fresh high volume high pressure oil pump.
New water pump with low drag ceramic bearings.
Replace knock sensors and blind tap the threads.
Replace front two 02 sensors.
Pull throttle body, clean it completely.
Clean MAF.
De-oil intake manifold an install a catch can.
Pull pushrods check for straightness, replace all with hardend if any are bent, even slightly, Clean each one to bare metal and roll on piece of glass to check for bends.
NGK TR5 plugs for typical tune, NGK TR6 if you want to really push some timing in your tune.



Check for wear, replace if needed on these.

Check U joints for play, Check trans output shaft for play if 2wd.
Idler arm.
Pitman arm.
Tierod ends.
Balljoints.
Control arm bushings.



all I can think of atm...


Those mods and repairs listed above will make a substantial improvement to your power and drive-ability..

What do you mean by "De-oil intake manifold"?
I don't recall seeing that phrase, before.

 

[JesusArTorres]

if your vehicle has 160k miles you need to first work on the wear and tear before you start installing stuff like vette servos on a high mileage tranny

Yeah, I'll stick to replace stuff first before the mods. My main concern is the suspension. Then the engine.