Gen 5 LT Swap Questions Answered (and Myths Busted)
LT1, L86, L83 and LV3 Harness modification is available. Gen 5 LT Standalone Harness conversion pricing is $536.00 and includes a Delphi fuse/relay block with dust cover and fuse legend. The correct Pedal Connector and an OBD Port are always included. We also provide a Fan Relay Block for powering 1 or 2 Fans.
Typical turn around time is 3 weeks. (Yes - 3 weeks) Please review the Q&A section below and click the Gen 5 FAQ video tab above for answers to many of the questions you may have.
Gen 5 LT1 Startup Video (at 15 seconds)
Gen 5 LT1 with T56 Manual (Modified from a C7 Corvette Donor)
Plain English Disclaimer: Over the years we've presented a ton of information here on this website, in videos, verbally over the phone, in printed instructions and supplements. We've done our best to test and verify each suggestion made and at the time any information is conveyed it is believed to be accurate. However GM makes calibration changes to each of their Electronic Modules internal software and hardware systems on an irregular basis. We will do our best to update and modify the information we convey here on this website in a timely manner once a new challenge is discovered. In the end, it's up to you the customer to check back here for updates to suggestions and installation techniques and make the appropriate modifications to your installation approach if needed.
We get a bunch of calls and emails every week about what is needed to make these swaps run and what works and does not work. Since there is already a ton of false info out on the internet about these swaps, I'll try to clear up the Myths and Factoids out there.
My answers are based on the over 350 LTx Swapped vehicles we already have on the road as of December 1, 2020. Below is original content. Nothing is a repeated myth from the internet or a magazine article. We've applied and tested each answer given below and in our FAQ videos so we know it works.
One Example is the 34 Ford on our home page. It was swapped with a L83/6L80E nearly 3 years ago and has logged nearly 30,000 miles on it since the swap was completed. Not only is it our customer's daily driver, it's been driven from Florida to California and Tennessee so the swap is proven. It went through the mountains, through 120 degree heat in the desert and has been in freezing temps without a hiccup. Note: This vehicle uses a Walbro 255 LPH fuel pump with a C6 Corvette Fuel Filter Regulator Combo just like an LS Swap. Don't be fooled into thinking the L83 needs 75 PSI. This one was dyno tuned by Jeremy Formato at Fasterproms and is running perfectly with just 58 PSI for 3 years (over 29,000 miles driven) without a hint of fuel starvation at this pressure.
This list is not all encompassing but as the questions come up I'll post them and the answers based on what we know works. - Ken