Hello Everyone!!!

Here is what I have.

Original owner......1998 C1500 rcsb with a stock 4.3( not for long)

I have done some suspension mods....DJM 4/6 drop

Recently purchased a 5.3 out of a 2000 silvy and plan to install it with some internal performance upgrades. The reason for the 5.3 was the price....$200
I do have the harness but no pcm...Could I use the old one? looking to do an emissions legal swap

Any pointers for the swap would help ..... fuel pump,power steering pump,gauges,trans and so on

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OBS to LSx conversion

Start reading.........

 

Thanks for the link
trust me I have been searching and reading....found a nice build article
RETRO LS BUILD, PART 1 Precision Engine

just looking for info to make it easier without the hassles

 

I did the same swap a few years back. I had a V6 5spd and swapped in a 6.0 80e. Being a V6, the motor mounts are a problem. You need to drop the front control arms out to access the hardware that holds the mounts in. I replaced the V6 mounts with factory V8 mounts and then used Dirty Dingo adapters to get the engine bolted to the mounts on the crossmember. The power steering should be the same, pressure and return lines should connect to the pump on the 5.3.
Good luck man!

 

Thanks
So for the power steering pump...i can't use the one from the 4.3.

I did not get one with the 5.3 but had priced them out just in case.

I did find another link for the swap
http://www.hotrodlane.cc/PDFFILES/Lisa%20Tahoe.pdf

 

I didn't realize the pump was missing... The pump reservoir on the 4.3 pump wont fit the accessory bracket on the 5.3. You can use the 4.3 pump if you buy a reservoir for a 4.8/5.3 from the dealer. You will need to take the pump out of the old reservoir and install it in the new one. Its a piece of cake.

 

you do not have to drop the control arms to change the motor mounts out. all you need is a swivel socket and a 6" extension.