GMT800 Engine Change ['03 Tahoe] - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**'68OrangeSunshine** · 11-23-2024, 08:57 PM

After running my '67/'72 GM trucks for over 50 years, I have now crashed the Twenty-First Century time barrier. Since my 2003 Tahoe C/1500 has 297 thousand on the clock with a 4.8L Vortec engine, I am exploring the possibility of replacing the engine -- when its time is up -- with a 5.3L.
Are dealer crate engines available?
What about junkyard [excuse me, Auto Recycler] GMT800 Engines?
Since there's an ECM computer [or more] involved, what do I have to do to get a bigger mill?

11-23-2024, 08:57 PM	#1
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,509	GMT800 Engine Change ['03 Tahoe] After running my '67/'72 GM trucks for over 50 years, I have now crashed the Twenty-First Century time barrier. Since my 2003 Tahoe C/1500 has 297 thousand on the clock with a 4.8L Vortec engine, I am exploring the possibility of replacing the engine -- when its time is up -- with a 5.3L. Are dealer crate engines available? What about junkyard [excuse me, Auto Recycler] GMT800 Engines? Since there's an ECM computer [or more] involved, what do I have to do to get a bigger mill? __________________ Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; 11-23-2024 at 09:27 PM.



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