98 Jimmy tune-up and timing

All,
    I want to tune-up my 98 Jimmy myself. 75K miles. I've read everyones input on Delco vs Bosch plugs, buying a good cap, and buying good wires.
I will of course try to buy the best out of all of the suggestions.
    My question is that nobody has mentioned the timing. I know the timing light and manual adjustments are a thing of the past. Do I need to have a computer check and\or change my settings after a parts tune-up? If so I need suggestions. GMC wants $165 for plugs and I'm guessing timing.
Thanks in advance,
Rick Bellagio Hotel and Casino
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
You CAN NOT adjust timing on the Jimmy....it is computer controled. I learned about that in an auto tech class I took last year. Mitchell Manual for the 98 4.3 Vortec V6 states that the timing is NON-ADJUSTABLE
just letting you know
I have a 98 Sonoma 4x4 4.3 Vortec, thats how I know ;)
Jason
--
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com ).
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Look around online, odds are theres a computer chip or a hackers fix to allow you to change timing by swiching chips or fiddling with a soldering iron...
rhys
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.