They make adaptors for different types of speedometers used. The PCM uses this info to change shift points. If you are using an automatic 4L60e that comes with it, the speed sensor is high resolution and goes into the PCM. Just note your choices of tires size, differential ratio, A/C or not, Tach signal, Emissions, VATs delete, transmission type, two electrical cooling fans can be enabled thru the new PCM, etc. Keep the VIN from the donor vehicle and other info as this will help when it comes time to re-program the PCM. Just use solder, shrink tubing and dielectric grease on connectors. This can seem hard for someone who has not done a lot of electrical work, much less re-wiring something like this, but there are videos and clear photos & diagrams on LT1swap for that year of engine. Most PCM's generate a 4 cylinder signal, that can be changed during reprogramming if needed. Only GM's white teflon sealer will work in these cases.Īs mentioned above, to make the Tach work, a resistor is sometimes used to create a "Pull-Up" circuit to increase signal strength. Also, Do not use a sealer on the thread as the body of each sensor is ground thru the engine. The "LS" type engine oil pressure sender is not needed on the older engines, so with the 16m adaptor, your old oil sender will screw right in, just use the OEM wire as the "LS" type, that wire goes into the PCM. Leave the Temp sensor for you engine in place, but go to opposite side cylinder, purchase adaptor kit, install your coolant temp sensor for your truck. Yes, locate and re-use your temp and oil sensors for the dash as the donor engine has two locations for temp sensors. Your can do it with four fuses and tie into your harness. was already mentioned, but as spoke of, has a ton of info for wiring your "LS" type engine. As you mentioned, you're donor is a 2000 5.3L.
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