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Author Topic: 2002 5.3 avalanche performance upgrades  (Read 6748 times)
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chevypro101
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« on: 08/05/08 10:45 AM »

I bought a 2002 z71 avalanche with the 5.3.. I installed a k&N cold air kit, and cat back exhaust.. I had a hypertech programmer but it did nothing.. is there any performance upgrades that can be done cheaply  that is worth it.. besides turbo, nitrous, supercharger Huh I know some vehicles have factory parts that are very restrictive is there any in this case?? intake?? headers and so on?? thanks Help me!
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MooseAlanche
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« Reply #1 on: 08/05/08 02:43 PM »

 Welcome! to the club chevypro101
You could try a Nelson or HP tune. People here seem to be very satisfied with the results. Someone with more info on these will chime in soon I am sure  Thumbs up!
Which HyperTech tuner did you have? And which tune did you load?
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Pete
05 Black Avalanche 5.3L, Z71, Cladded, Chrome Brush Bar, Speed Grille, SS Nerf Bars, Fire & Ice Tailgate LED, Lund Bug Shield, Putco Tailgate Handle Cover, K&N #77 Cold Air Intake, PowerAid TBS, MagnaFlow SS CatBack. Since Joining CAFC: Amber FTDRL, LED Sail Panel Lights, Amber LED Grille Lights, Door Pocket LED's, Mag Lite, 3rd Brake & Tailgate Decals, Cargo Light, Billet Gas Door, Tailgate Cup Holders, Backup Cam, I Pod2car, WoLo Horn, PlasmaGlow Xeon Bulbs, Window Tint, Tailgate E-Z Up, HyperTech
chevypro101
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« Reply #2 on: 08/05/08 04:45 PM »

I bought I guess it was one of the first hypertechs made.. The only good part was the speed limiter.. 87 or 93 no diffrence between performance checked with g tech at same spot and same weather conditions.. I know the 2002 there aren't to many programmers as the 2003 up.. Truck runs better then I thought for only a 5.3 in a 4 wheel drive sled.. I read some where about replacing intake manifold to a corvette one but I can find that right  up any more.. I just don't want to try random performance mods in hope for a feelable diffrence and it not be there.. So pretty much any help is welcome.. Thanks
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02Z71_Tonka
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« Reply #3 on: 04/14/10 07:12 PM »

Long tube headers w/ Y pipe
Trailblazer torque converter
cam, springs, and push rods
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Brandon
'02 Forrest Green Metallic Z71 Avy
Nitto Dune Grapplers 285/70/17
3" Suspension Maxx lift
GMPP CAI
Hypertech 93oct tune
bppro1
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« Reply #4 on: 01/01/11 07:30 AM »

Guys do you get much out of putting headers and full exaust on? I know I picked up 30RWHP on my TA but kinda a different critter :>
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02 AV summit white, K&N cold air, magna flows,20" MOTO's
avalonandl
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« Reply #5 on: 01/21/11 10:55 AM »

The hypertech shuld have done something. Have you checked your plugs and compression?

The other tuners are a little more agressive.
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2004- Sport Red 2500, w/ 4.10 axle and stump pulling torque! Flowmaster BB50 w/ oval tips out each side. Xenon lights, Firestone Airbags, amber DRL's. Hypertech tuned for regular fuel. 180  T-stat.
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