2003 Suburban Z71 - Performance Add-ons - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Houston54 · 11-28-2007, 01:28 PM

I recently purchased a used 03 Suburban Z71 and have a few questions as to performance upgrades that are possible/recommended for this engine. The motor is the cast iron 5.3 block with LS style aluminum heads. Is this a LS motor or does it go by another designation?

I am looking for better performance from it and am investigating exhaust systems (headers/cat-back) options, intake options, and camshaft options. Would like to continue using 87 octane regular and keep the interior noise level low.

The last suburban I dualled out had a significant resonance issue inside the vehicle which did not please the wife.

Any suggestions on specific modifications and suppliers I should consider?

67HEAVEN · 11-29-2007, 10:33 PM

Quote:

Originally Posted by Houston54

Is this a LS motor or does it go by another designation?

I believe you have a LM7.

11-28-2007, 01:28 PM	#1
Houston54 Registered User Join Date: Feb 2005 Location: location Posts: 527	2003 Suburban Z71 - Performance Add-ons I recently purchased a used 03 Suburban Z71 and have a few questions as to performance upgrades that are possible/recommended for this engine. The motor is the cast iron 5.3 block with LS style aluminum heads. Is this a LS motor or does it go by another designation? I am looking for better performance from it and am investigating exhaust systems (headers/cat-back) options, intake options, and camshaft options. Would like to continue using 87 octane regular and keep the interior noise level low. The last suburban I dualled out had a significant resonance issue inside the vehicle which did not please the wife. Any suggestions on specific modifications and suppliers I should consider?



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