In this video I do a dual electric fan swap on a 2000 Silverado using the BP Automotive Fan harness. Thanks for watching please like and subscribe for more content.
This was my experience with installing Dorman electric fans, a Denso 32" radiator, and an AC Delco 145 Amp alternator, with the BP Harnesses (relays, fuses, etc.), AC upgrade kit and BP tuning of my PCU. This was on a 2000 Silverado 1500, Z71, with a tow package, and the 5.3 engine with 148,000 miles. The truck also had a new/rebuilt transmission, a Scan gauge device and a new clutch fan installed last year. Much of these installation procedures I learned from RU-vid videos, but BP also sends very clear instructions. After the total installation and completing a key/security relearn procedure for the PCU/computer, my truck started but was running roughly. I then learned from my HAYNES manual that there is also a relearning process for your PCU when you disconnect and/or remove the battery. You'd think I'd have already known this. That process is to run the engine at idle until the temperature comes up toward the normal running temp, then run the engine at 1500 rpm for two minutes, then drive at least 5 miles under normal conditions. While running the engine at home I turned on the AC and the fans immediately came on at low speed, and they would intermittently, briefly cycle off and then back on. While making the relearn drive I drove down the HWY approximately 20 miles at 65 mph and up one steep incline, then back through some stops and starts. On my Scan gauge I could see that, as normal, my engine was running from 190 to 195 degrees. And my transmission was at 170 to 175. My truck temp gage stayed where it always does, unless under a heavy down-shifted load, at the first line before 210. As I wrote previously, I know that my fans come on at low speed as soon as I turn on the AC. And BP programs the fans to come on at low speed at an engine temp of 216 on, 209 off. And High speed at 225 on, 217 off. So, I turned my AC off intermittently to see if the engine temperature would go up and it never changed. It makes me wonder how much that clutch fan was spinning and using horsepower, even when it was unloaded, when it wasn't even needed. Or maybe the bigger radiator is the difference. Today I made my first run further, pulling my 21' toy hauler trailer on the HWY at 65 miles an hour up several grades/hills. One reason I upgraded all of this, besides the little bit of extra horsepower, was that before this, when I would pull my trailer over this same route, my transmission would down shift, my engine would go to 4000 rpm and if stayed at 4000 for more than a few minutes my engine and transmission temps would sometimes hit 120 to 125. And I did not like the sound of my engine in that state. Today neither my engine nor transmission went over 110. And my engine sounded so much better without the clutch fan. Even idling it sounds better. To be factual, today I was not as loaded down as I would be for a long camping trip and the outside temperature was only 70 degrees. But there was a very noticeable difference in the amount of downshifting and the temperature rise. Also, I checked my battery voltage when first starting the truck the first time, with the new alternator. It was reading 12.7V not running and 14.7V running, as it should. Today while pulling my trailer, I turned on its running lights and the AC to try and get as much amperage load as possible. At no time did my voltage gauge drop at all. But, since my engine never went over 110, with the AC on and fans at low speed, my fans would not have ever needed to come on at high speed. That means that I still don't know if there will be a voltage drop when I am pulling a heavier load and both fans go to high speed. A few more notes on things I learned. I didn't know that the old fan shroud bolts would not work for the new fan assembly so, I had to go to the dealership to get two more of the radiator bolts. The BP instructions tell you that you should change the O-ring on the AC Schrader valve that the pressure switch you'll install goes on. I also got that at the dealership. The instructions didn't mention that when installing the pins into the PCU you'll need something sharp and no larger than the size of the pin to punch a hole through the weather seal of the ports that did not already have a wire in them. I used a Phillips screwdriver about the size you'd use for glasses. One other difference from the instructions I ran into was that where the new relay assembly mounts, next to the relay/fuse box, I had an extra connector mounted under where the new assembly was supposed to go. So, I had to make an extension for the bracket where your supposed to mount the relays and I was able to mount them about 2 inches higher, over that extra connector. The case fit over this with no issues.
Great video, appreciate you sharing this. I'm planning on doing my 02 silverado, but instead of using the computer, I'm planning on using a Dakota pac-2800bt controller.
Maaan I'm doing this mod along with longtubes and an intake and you just saved me tons of time. I was planning on gutting a harness from a tahoe that's equipped with these fans and reusing it. Not only does this save me the time love doing all that then putting a harness back together with the Heat Protector tubing and making everything look nice, but it takes out a ton of effort. This kid is so straightforward I'm glad you showed it on your Channel
Did this on my 00 GMC and 02 Tahoe, a year ago. Good quality harness and tech support, if you need it. The high pressure switch upgrade is a MUST IMO here in the So. Ca. desert. I used the fans out of 08 Escalades 6.0 for both trucks, and I upgraded the radiator in my GMC to the wider one, it was leaking anyway.
Quick question. I did the exact modification as you, everything works as it should for high and low speed operations. However, I cannot figure out why the high speed fan will not engage at the ac psi threshold. Any thoughts?
I have the same harness. Bought it to replace my stock electric fan in my 05 z71. The harness is beautiful. The fuse block blew my mind. The way it was packed was crazy. In a box, inside another box filled with packing peanuts. Was extremely impressed
So curious. I am looking at the BP harness as well... for my year they have the ac update kit. But yours works just fine and no mention of the ac kit? Comes with a pressure switch ect. Thanks.
Quick question, why did you connect a positive wire in the back of the alternator? Can you just have connected to the battery or that little red battery box?
Hello question what if like most of us doing have a hp tuner to do this how much does it cost after doing the job and getting it program somewhere else because I see they will not work at all
I have one of the fans (pass side) turning on high while the other is totally off when one signal wire is activated and when I activate the other wire both fans turn on low speed. When I ground both signal wires out just the passenger side high speed fan comes on.... is this normal operation? Thanks
Can you verify the blue and green wires going to the ECU? My tuner said the blue wire should go to pin 42 and green to pin 33?? Read some forums and saw another RU-vid video and they had the pins setup different than BP auto as well.
So I have a 2003 silverado 1500hd. I currently did the electric fan swap. I took the fans and the harness from an 2005. Once installed I got a buddy to tune, and enable fans. Wiring - small green wire pinned in blue 42. Small blue wire pinned in 33 green. Power and ground connected...... Well what I'm recognizing is that only the passenger side come on high once a/c pressure build up and in the middle of me driving. It's weird because I let the truck sit and run and idle to see when fans cut on at what temp. Temp gets to 200-210 and fan never cuts on. Only when I'm driving for a while and I come to I stop I hear the fan. So I don't know when they actually come on. Does both fans suppose to cut on at low speeds??? Are both fans suppose to cut on at high speeds ??? When I ground the green from the fuse box both fans come on low. When I ground the blue one passenger side comes on high
Really like your setup, question. Do both fans come on low speed for low temp, then do both fans come on for high temp with this harness? Thanks, Great video
Does your fans come on when you turn on the A/c compressor? Because my don’t and my compressor starts ejecting the Freon through the restriction bypass, Before getting to operating temperature for the fans.
@@gripnrip61 i ordered one recently from them and they had an optional ac switch with a little plug havent installed it yet though. Did you ever figure yours out?
Hello nice video I’m doing a e fans on my 2000 Silverado swap I have a blue and red cover on my computer I no blue is pink 42 and the red is pink 33 but on my red there is already a green wire there so what do I do now please help
You can do the tune before. I am in the process of getting this conversion done on my Hummer H2 and I had the tuner tune my ecu. He set the temps as follows: high speed fan at 212/209 low fan 205/198.
If it is the same design as your old but higher amp, why would you need a new belt? They are stupid. Unless you got a different alternator from a different vehicle.
@@buddyrebel_Garcia Higher amp alternator is actually overall bigger. 2 part numbers are usually listed one for each alternator. I did the conversion and did use the part number for the 145 amp alternator, belt fit like it should.
I watched your video over a year ago. Just wondering, how is it working so far? Are you very pleased with it? If you had to do these conversation all over again on a different truck would you do the same? Please let me know. Thanks, Great Video
I have a 2001 GMC Sierra I like to install a electric fans basically I like the set up you install but I don’t have a scanner to adjust the temperature for fans my question is can still work with out scanner adjust the fans ?
You dont need a scanner, if you bought the bp harness with the blue and green trigger wire, you can get the Dakota Digital pac-2750, or Dakota digital pac-2800bt module and set it up
Followed your setup exactly. Works great but after getting to temp a relay won’t stop clicking. Customer service states it’s an issue with my calibration. I have HP tuners and did same thing you did. Any suggestions? Thanks.
From what I understand is not a lot of other programs out there allow you to mess with the fans but HP tuners and a GM tech 2 tool that dealers used on GM vehicles. You can also find a tuner in your area to see if they will do it for you, some of them have HP tuners for tuning GM vehicles or see if the dealership will turn the fan function on for you with the original temp settings set correctly but it all depends on what they charge and if it would be worth just buying HP tuners to do it yourself for around 350 bucks so youcan change anything at anytime you want. You can also try to find a original tech 2 for sell they are close to 1000+ buck or more, it's crazy 🤪. I myself am in the process of doing this mode, I have the fans and bought the OEM harness that came from a GM truck that had the e-fans on them and now looking for a tuner myself to see the pricing and depending on the pricing will either have the tuners do it or buy the HP tuners and do it myself. Hope somewhere in here I answer your question.
Not to forget without using a tune, you can run the green wire to a switch and the blue wire to a switch, both switched to ground to turn them on or off manually, one switch on is low, both switches on is high. Or buy a fan controller from like flex-a-lite fans and run them that way without tuning but the OEM way is the best way to go.
05-09 silverado , tahoes, subs, fitts all, Get the stock 05+ relay kit, its very cheap at junk yards , this kit this guy used it could be like 120$, And the stock kit its like 25 at junk, or someone parting a truck
Why not just go to a truck that already has electric cooling fans the fan harness is a separate harness that's a plug in and with its own relays and everything hooks right into the factory fuse box i bought my complete set up out of a 05 Silverado with a 5.3 from my local salvage yard for 75 bucks and that was with the fans included
