5.3l or 6.0l into a 94

[slow94]

I think with proper programming, you could run 4l60e, 4l65e, 4l80e, T5, T56, and the NV3500/4500. Some will require a spacer depending on the year model.
TCC=Torque Converter Clutch PWM=Pulse Width Modulation

I have a 97 4l80e behind my 05 5.3, So I can guarantee thats doable. I had to buy a flexplate from crateenginedepot.com, it came with the spacer and 6 correct length bolts for around $50. then I just found a BIN file for a 6.0/4l80e and tweeked it for the 5.3 and flashed it in using efilive. I've finished the swap, but still need to tidy up the wiring and run some exhaust. The problem is, I just bought a 94 fullsize blazer that I am much more excited to work on, so the 94 truck is gonna be on the backburner for a little longer.

[1994silverado]

Thanks for the info. Whats a decent price for a 6.0? I found one locally for $1,000 with everything but a starter and 92,000 miles but that seems alittle high to me. I could also get the tranny for it for $800 but that's way more than I would pay for a tranny with 92,000 miles.

[fernanbfg1]

I too am in the same situation. I have a LQ4 out of a 2004 GMC Yukon XL that my buddy is installing into my 94' 2dr Blazer. I'm most likely going to upgrade to the 4l80e as well.

According to the guys at Street & Performance (http://www.hotrodlane.cc/):
While on the subject of transmissions, it should be known that
‘94 and earlier 4L60E transmissions used a 12 pin connector
and can not be controlled by the GEN III computer, only ‘95
and Later 4L60E transmissions using 13 pin connecter can be
used.

[kellyflip]

According to the guys at Street & Performance (http://www.hotrodlane.cc/):
While on the subject of transmissions, it should be known that
‘94 and earlier 4L60E transmissions used a 12 pin connector
and can not be controlled by the GEN III computer, only ‘95
and Later 4L60E transmissions using 13 pin connecter can be
used.

I am not sure why they say that only 95 and later can be used. I currently have a 5.3 from a 2002 silverado in my 1993 Z71. I have the original '93 tranny mated up to this engine. the only problem is I get a P1860 code because my tranny does not have the TCC PWM solenoid. overdrive works fine and the lockup seems to work also. I have almost 30,000 miles on this combination without a hiccup.

[khumphreys]

Kellyflip,

Hook me up with some of the items that you needed and what are some of the problem you ran into. Is the wiring a PITA like everyone says?

[kellyflip]

Kellyflip,

Hook me up with some of the items that you needed and what are some of the problem you ran into. Is the wiring a PITA like everyone says?

the wiring is not that bad if you can read wiring diagrams good. I got a subscription to alldata for my truck and the donor truck which made things much easier. it has pinouts for all the connectors and shows what they look like for easy ID. and excellent wiring diagrams. the main 2 things you will need are GM part # 12563532 which is the crankshaft spacer. and a set of engine mount adapter plates. I don't want to give you more parts untill I know what you are putting it in and what the engine came from. But will be glad to help in any way. This is a great forum to be a member of if you are going to be doing a swap of this kind. Many knowledgeable people on here. with the help of these forums I got my swap to start and run on the first try without any problems. good luck to ya if you go thru with it.

[khumphreys]

I plan on putting a 5.3 in my 93 shortbed k1500. I like the idea of keeping my 93 trans, just because there is nothing wrong with it and why try to spend the money and possibly have to modify the driveline and all that jazz. I'll be happy with getting the adaters for the flywheel and fabbing some new engine mounts. I started reading the sticky up top and have a general idea of what needs to happen. I am still foggy on the wiring. Is it possible to just use the GEN 3 cpu and get rid of the old one, or do you have to use both of them. And I know there is an issue with the speedometer and the drac but i cant really make out the problem in some of the threads. Do you have a thread on you build?