Basic Per. Upgrades for 03 I6 ??

By 99SLT4.3
January 20, 2006 in Gen III & Gen IV V8 Engines (LS-Based)

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99SLT4.3

Posted January 20, 2006

Just picked up an 03 Trailblazer LT. Any suggestions on upgrading engine/performance?

Looking to squeeze a few more MPG's and HP/TQ. I've done the Wester's TUNE in my 99 and am impressed. Is there a logical next step after a TUNE and maybe a K&N drop-in for my 03?

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