Electric Cooling Fans on a 99-04 Silverado ft TURBO 8.1 BUILD ALMOST DONE

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Thanks to FarmerJohnson Off-Road for sending in an electric fan harness, and check out one of his videos on how to remove an electric fan harness at the junk yard. / 93xjheep
In this weeks upload, we take care of one of the last things that are stopping the turbo 8.1 Silverado from driving and tuning, and thats the electric cooling fans operating. I already had installed the 2005+ Silverado dual electric cooling fan assembly, but had never wired it up so today thats what we take care of. I'm using a factory fan harness assembly which fits nicely into the stock fuse block and looks, well, factory. The nice thing is it operated just like factory as well, with the low stage coming on at 195* and the second dual stage coming in at 208*. When both fans are running at high, the truck should never over heat.
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Chapters:
0:00 Welcome
4:00 The harness you need
5:05 Installing the Harness
8:13 First Test
10:00 Pinning the ECM
13:12 Tuning the Computer

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Опубликовано:

28 июл 2024

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Комментарии : 347

@alex_8025 3 года назад

Gotta love factory-ish swaps cause everything goes together properly. Do it right the first time and you dont have nearly as many issues down the line

@LawrenceTolman 3 года назад

my sentiments exactly. thanks for watching!

@DAREALCOUP 2 года назад

What is the extra step if you want to keep the ac function

@guymaninu Месяц назад

😂

@bigredracer7848 3 года назад

5👍's up LT thanks again for taking us all along with you for the great news

@johnelliott7375 3 года назад

Awesome information on the installation of the electric system and horse power saver. 🐎

@MrJimbobdudeguy 3 года назад

ive loved following this build its amazingly clean, i am interested to see how to integrate the electric cooling system into the computer next

@Kstang09 3 года назад

Almost at 30k subscribers! Keep up the awesome stuff man.. your TV time/skills show in your content; your editing and info are top notch & you never have any filler. Sweetness.

@LawrenceTolman 3 года назад

I appreciate that!

@vr-cx6lq Год назад

Thank you you had the most informative video on this topic and helped me complete the job on my 2004 Yukon Xl 2500 with the 8.1

@pnwchris2000 3 года назад

so excited to see it tuned and on the road soon

@Kdog307 3 года назад

great job! love your approach, and all the info! thanks LT!

@LawrenceTolman 3 года назад

Glad you enjoyed it!

@Sloppyjalopy123 3 года назад

Congrats on the 30k, I'm pulling for ya. Always learn something by tuning in!

@LawrenceTolman 3 года назад

I appreciate that!

@cool62chev 3 года назад

Great video LT. Like the way you test the harness functions.

@LawrenceTolman 3 года назад

Thanks 👍 seems to go smoother if you test partway through an install, that way if there is a problem you can isolate it quicker rather than looking at the whole thing already installed.

@RidinChevySolo 3 года назад

good call on the OEM cooling harness. I had a buddies 03 that had an electric fan swap with aftermarket kit die on him out on the trails. Luckily i have a pretty good knowledge of the wiring, and i pulled out the relays and bridged power to get us back home. not bad for just having a pocket knife and some duct tape.

@reallybigfooted 3 года назад

killing it with all the little technical bits that everyone else leaves out! keep it up!

@LawrenceTolman 3 года назад

thanks!

@JM-yx1lm 3 года назад

Well that's just must be because you are a fan boy because he said there's another step you need to do for ac but then he never said what that was. Since he doesn't have ac he figured everyone else doing this shouldn't have it either.

@loganworthington4208 3 года назад

Love this Channel. You do a great job delivering information the internet it vague about. I wish I had this build footage 4 months ago! My build is dang near the same as yours and the fans kicked my butt. Cheers from Idaho

@LawrenceTolman 3 года назад

thanks so much! thats the goal, is to provide valuable info to help others along the way

@jonathanorona7493 Год назад

@@LawrenceTolman If you know, would you mind sharing how this would pin into the ECM if AC is still equipped? Also if this were done with AC would the ECM still need to be programmed in order to provide the negative/ground to the fans at the desired temps? This install is great BTW. Texas heat and my GMT800 do not get along when I am sitting for too long and there’s no air circulation through the radiator. I would love to do this conversion!

@grants.9120 3 года назад

I used to do this type of conversation at the dealership all the time. We used to get fleet Focus's without crusie control very cheap. Add the factory contol switch, or change the steering wheel in some circumstances, enable crusie control in the PCM, and factory cruise.

@chadm3985 3 года назад

I did this swap on my 03 Suburban 2500 about a month ago. I actually learned about the HD fans from one of your earlier videos. Thanks! I'm looking forward to pulling my camper in the mountains this summer and not having the clutch fan rob so much power.

@LawrenceTolman 3 года назад

sure thing! they move a ton of air for sure, and from what I have read, the HD version does a great job keeping the engine cool even when working it hard

@pocketdimes1048 3 года назад

So close to 30k! Congrats LT’

@cadi_addik6193 3 года назад

I have a 2001, I’m looking to do this in the future. Thanks for the video tutorial.

@LawrenceTolman 3 года назад

Glad I could help

@nicksjustbored 2 года назад

Best video on how to do this. Thanks.

@davidm.d.hyskell8983 3 года назад

Almost at 30K!! Congrats!

@liquidsmokemustang1537 2 года назад

Hey LT, Don’t I remember seeing you on Power Nation? So glad I stumbled onto your channel. I have a 2000 Silverado 5.3l that I’d like to do this Efan swap on. Clutch fan sucks and I love the thought of having factory Efans and hardware. Just subscribed to your channel. Haven’t looked if you did a parts list for this swap yet but, wanted to give you big props for this video. So many crap videos out there, it’s nice to watch a real mechanic do it and tap your knowledge. Thanks!

@marceloduelli 11 месяцев назад

This video actually helped me natrow some options. Fan works(both). Realy works. When I tested with the blue wires on negative of battery it works. Fan was working fine until a Heather core conection broke. Now won't come on. New temp sensor was installed.

@MrScottt28 3 года назад

Nice work LT! Looks great. I also support the "factory appearing" mindset. It makes for a clean install and fewer issues down the road.

@LawrenceTolman 3 года назад

My thoughts exactly

@edwincano2990 2 года назад

@@LawrenceTolman fh he cchc

@noe.3559 9 месяцев назад

i was shitting bricks wondering why i had a red connector thing and this video came so clutch man , appreciate it LT

@danieltubbs5422 3 года назад

Really good info, lets hope it doesn't snow until AFTER burnouts.

@LawrenceTolman 3 года назад

well, the snow will just make the burnouts that much easier lol

@Mr62biscayne 3 года назад

Another very informative video. Keep them coming.

@LawrenceTolman 3 года назад

Thanks, will do!

@MrJ-og2hk Год назад

you know what you doing ... love you man ... thanks for the vid.

@benjaminaguirre5755 3 года назад

I've been waiting on this. Thanks LT!

@LawrenceTolman 3 года назад

Hope you like it!

@JuanCJimenez19 3 года назад

Can’t wait to see the first burnout🤘🏼🔥

@LawrenceTolman 3 года назад

me too!

@RandBLSWorld 3 года назад

I did the fan conversion on my 06 Silverado 2500 .. great video LT !

@ST8KFINGER 3 года назад

Do any towing with it?

@RandBLSWorld 3 года назад

ST8KFINGER No. I really don’t tow a lot. I did it for ease of access and really like electric over mechanical.

@LawrenceTolman 3 года назад

Right on!

@jonhodges5344 3 года назад

That orange hose going to the overflow. 🤣🤣🤣🤠 I hope you get to 1 million subs. Miss watching you on power nation.

@LawrenceTolman 3 года назад

temporary hose until I build the bracket for the overflow, believe me. it sticks out like a sore thumb

@jonhodges5344 3 года назад

@@LawrenceTolman just messin with ya. I’m a fan for sure brother.

@TeamTopKick 3 года назад

Clean install. Nothing like wiring it like OEM and not just a bunch of wires just laying in the engine.

@LawrenceTolman 3 года назад

thanks! i cant stand messy wiring and "add-ons" that look out of place

@stittyd 3 года назад

Hey, congrats on 30k, even if it is a few days after the new year. Keep it up! 100k+ Here we come!

@LawrenceTolman 3 года назад

That's the plan!

@tuscani915 3 года назад

Did the same fan upgrade to my 01 Tahoe. Hard to find the parts but way better then aftermarket in my opinion. Sent out my ECU to a tunner to unlock the fan feature, so for I have had this upgrade for several months and no problems at all. In my case I can only use one of the leads to the computer and the other to a relay to change the positive polarity to a negative and run to a a/c wire.

@LawrenceTolman 3 года назад

yup! had a few people ask about that, should've done a better job explaining the differences in the early years for AC

@gregquante8864 3 года назад

29,900 Congratulations!!!

@lamboferruccio 3 года назад

Love everything about this build...except the fact that it has no AC, you need that even in the winter to defog your windows but hey to each their own. Keep it up LT can’t wait to see this thing haulin ass 😝

@LawrenceTolman 3 года назад

I'm with ya there, I wish it still had it in place

@jameshall4385 3 года назад

That install, is almost like cheating. I love it when things go that easy.

@kylerobinson9789 3 года назад

Easy, check this out ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-NVysqXm81aw.html

@afmoa 3 года назад

I want to do that electric fan swap on my 06 1500HD. Thanks for the information on how to do it.

@VATION3RD 3 года назад

Congratulations LT on your 30.3k subscribers

@LawrenceTolman 3 года назад

Thank you so much 😀

@CheezburgerBrown 2 года назад

For the last week I have been trying to figure out why my new to me '03 2500 silverado AC has been not working at low speeds.. Turns out the previous owner did E-fan conversion. I'm assuming that they skipped out on the tuning because the fans only come on with engine temp, and not with the AC. Your video just gave me everything I need to know to go check that the pinning is correct and that I need to find a tuner to change that setting. Thanks for the help. Liked & subbed.

@SED9556 3 года назад

Congrats on hitting your subscriber goal of 30K!!

@LawrenceTolman 3 года назад

Thank you!!

@paulg.5075 3 года назад

Hey, LT. Congrats on 30K Subs!

@LawrenceTolman 3 года назад

Hey, thanks! just made it

@skuz34 3 года назад

when ever you take that big block out to get built i hope you paint it chevy orange, just make it pop a bit more. its a great project!

@russelltrupia4479 3 года назад

I see the subs are going up keep those great videos coming LT

@brucenaylor2043 3 года назад

So excited also!!!!!

@tucksmith8300 3 года назад

Awesome job LT !!!

@LawrenceTolman 3 года назад

Thank you! Cheers!

@tucksmith8300 3 года назад

@@LawrenceTolman did you upgrade the ECU for the turbo ???

@timdontwannasay5889 3 года назад

Keep it up! Looking good!

@LawrenceTolman 3 года назад

Thanks!

@jodydewey3516 3 года назад

you made it! 30K congrats!

@LawrenceTolman 3 года назад

Yes! Thank you!

@Finite-Tuning 3 года назад

Oh hey, you're damn near 30k already, nice! Looking forward to this tuned up and driving. I don't much care about burn outs, but I'd love to see some dyno pulls and 1/4 mile times. Cheers man 🍻.

@LawrenceTolman 3 года назад

Of course we’ll do some of those as well

@MrScottt28 3 года назад

Personally, I would like to see the burnouts. Long smoky pro stock type burnouts... no line lock, no nothing.

@Finite-Tuning 3 года назад

@@MrScottt28 Hey bud we all like what we like, but a little baby Go-Cart can do some real serious burnouts too! If Black smoke is your thing, well, there are plenty of folks out there to tickle your pickle in this regard! Personally, I'm a numbers man!

@daltonmarshall3083 2 года назад

@@LawrenceTolman what pin would you use to keep the ac going

@carter4627 2 года назад

@@LawrenceTolman PLEASE RESPOND. Do you by chance know the part number for the 9 blade efans, I know I can look but I've looked for an hour and can't find a promising answer

@jdelbrid 3 года назад

Congrats on making it to 30k!

@LawrenceTolman 3 года назад

Thank you!!

@MarkPdot 3 года назад

Congratulations on the 30k.

@LawrenceTolman 3 года назад

Thank you so much 😀

@TheOzarkWizard 3 года назад

Will definitely be doing this to my suburban soon, clutch fans are horrible. Also electric water pumps are preffered. Also my suburban almost never gets up to 190 unless its 90F+ outside

@crystalcortez9293 3 года назад

Congrats on the 30K LT

@LawrenceTolman 3 года назад

Thank you!

@bboyvillain84 3 года назад

Congrats on the 30k subscribers

@LawrenceTolman 3 года назад

Thank you so much 😀

@gocart09 3 года назад

Oh buddy I'm pumped up for the dyno

@LawrenceTolman 3 года назад

me too! cant wait to see how it does

@laska4075 3 года назад

Looking good buddy

@LawrenceTolman 3 года назад

Thanks 👍

@chrisp9926 3 года назад

By far the best video on the swap !!!!!!!!!!!! I have all the pieces to do the swap including the factory harness for my 01 with AC. Can you elaborate on the extra step needed for the AC to function properly with the new setup ???? Thanks

@LawrenceTolman 3 года назад

there are a few write ups online, but it involves triggering the second fan from the AC compressor clutch instead of the ECM, but that uses a positive signal instead of negative, so you use a relay to make the change and trigger the fan.

@gjolinares23 2 года назад

If I knew a badass like LT I’d have all types of stuff done to my trucks 👍

@Valdemar-Perez-III Год назад

Same

@928rcs8 3 года назад

I really wish i would of found your vid earlier now i want to re do my wiring with oe wiring to have a stock look

@StraightLineCycles 3 года назад

Almost there!

@johnathongulley1146 3 года назад

Your 30K man congrats on that.

@LawrenceTolman 3 года назад

Appreciate it! I'm pumped!

@OmarGonzalez-oq3kg 3 года назад

Great job Lawrence LT Tolman great channel 👍👍👍👍 that will be the same process for trailblazer ss??

@johnsmith-qz4bv 3 года назад

nice work

@LawrenceTolman 3 года назад

Thanks

@brandoncharley3070 3 года назад

Hopefully you do a DIYish fuel pump setup. I keep reading about people doing DIY dual 340 pumps in the stock basket, but have never seen any explanations on why certain steps are done.

@LawrenceTolman 3 года назад

thats the plan...

@MrJoseluisvideo Год назад

Cool thanks very usefull

@james10739 3 года назад

I did not realize they did an add on thing I assumed it was like in the fuse box and not really feasible to do and over $100 for the after market harness was way to much for me and my fans came with pig tails for the fans they had cut so I just had to get some relays and pins for the ECU and did it myself

@liamjerkins7259 3 года назад

2001 Isuzu Trooper has the same ECU/ECM with the red and blue 80 pin connectors, and ECU/ECM, 4l30e automatic transmission, and numerous other parts are also made by GM.

@shadowopsairman1583 3 года назад

You may want to check the part and serial numbers

@EricErnst 3 года назад

I put the same fan setup on my 1990 K2500 with a 34" radiator. Instead of junkyard stuff, I got a new one with a lifetime warranty from a national parts store chain. If I ever have any trouble, I should be able to get a free replacement from anywhere in the country.

@allanb3222 3 года назад

That's if they have it in stock and don't have to wait a few days to get it lol.

@Maximus-hw4gz 2 года назад

Hey did you get the 34 radiator with oil cooler or with out

@EricErnst 2 года назад

@@Maximus-hw4gz I have one truck with and I believe this particular one is without. This truck didn't have an engine oil cooler from the factory.

@Maximus-hw4gz 2 года назад

@@EricErnst oh okay thanks Eric what kinda radiator did you get

@DanielSanchez-jd4mq 9 месяцев назад

I’m about to do this to my truck tomorrow I hope I do it right lol

@chrisl2544 2 года назад

Love the video, fit and finish are exactly what I'm looking to do minus the ac functionality being lost gotta have that hear in Florida. What's the extra step you have seen to keep that operable. Was hopping you were going to give a little more info on that.

@bradhollinger2532 2 года назад

Yeah , mee too Chris ....have you found out anything on that ?

@-nobody6272 10 месяцев назад

@bradhollinger2532 you need the ac update kit from BP automotive

@carguy3028 3 года назад

My 72 GMC I have an ls 6.0 installed with factory computer and factory fuse box. I used a 28 inch radiator because that’s what fit and a 97 to 02 f body fan that I made some adapter brackets to bolt to the radiator. The fan is controlled through the ecu, and the ac has a trinary switch that also grounds the fan relay. One question I have is what temperature should the fan come on related to the thermostat you have installed?

@johnl5845 Год назад

Great video. . I have 2000 Silverado 1500. Pin 33 on red bank is already being used. Not sure what to do. I’ve found its for recirculation door control. Any ideas?

@jeremywilson1299 3 года назад

I’d love to know where to get that factory harness, I got one but it was cut up pretty bad

@dalebourgeois9851 3 года назад

Hey, Great video!!, Thanks, I have an 02 silverado 4.8, I fixing to put stock daul fans from the 06 truck. The auto parts store recommend a 197 degree thermostat. But I think that is too high. So I put a 187 thermostat a good while back. Thinking about putting a 180 for the swap. Originally when it had a 197 I could feel the heat when I raise the hood. So if I go with a 180 thermostat what should I set my fans at for low and high? PS, I using a Dakota digital 2800bt module and a BP Automotive Harness instead of the ECM because they want over $200 dollars to flash it.

@LawrenceTolman 3 года назад

if you do a 180 thermostat, probably have the first fan come on at 185, off at180, then the second fan a little higher, on at 195, off at 190.

@PrestonFarr 3 года назад

Smoky Burnout ahoy!!

@LawrenceTolman 3 года назад

coming soon!

@codyz2845 2 года назад

What's the additional step to wire it with the AC

@j-boy9256 Год назад

Any idea if this would work in a 97' k1500 if the radiator is 34?

@jeffjarquin5600 3 года назад

Love the gm pcm connectors, made a gen2 Lt1 stand alone harness yesterday

@LawrenceTolman 3 года назад

very simple to work with

@dantec8854 3 года назад

What are the additional steps for 02 to turn them on when a/c compressor is engage at iddle and to let the computer know my a/c is on thanks,

@RHYNOMAN12 3 года назад

I see 30K subscribers!!

@LawrenceTolman 3 года назад

just made it today!

@mrchilevengador 2 года назад

I pick one of those harnesses mine doesn’t have the ground cable

@Titian92 3 года назад

What is the extra step for a/c trucks? Does it require a extra relay? And great truck build.

@LawrenceTolman 3 года назад

yeah, basically a relay to convert the positive signal from the ac clutch to trigger the fans or something like that

@twiztid1fiddy 3 года назад

That’s what I was wondering

@Titian92 3 года назад

@@LawrenceTolman Thank you and keep the videos coming great work.

@chuckfrezzel348 8 месяцев назад

Trying to find the part number for the under hood fuse box cover with the extra opening for the fan relays? It would much appreciated.

@marvinvargas2127 2 года назад

What if I want my 99-04 trucks AC to work how it should with the E Fans, what are those extra steps that I would need to do in order for it to do so? Thanks 🤙🏾

@johnl5845 Год назад

Same

@jimmyramirez8844 5 месяцев назад

Did this my ac compressor does not engage

@dakotasimpson1883 3 года назад

Just pulled all the stuff to do this swap today. Was unaware he tuners was needed. I thought for all the world it was a plug and play deal. 😒

@daltonmccauley3822 2 года назад

What is the one additional step I need to do to keep my A/C on my 2002 Silverado? Installed radiator, fans, and 99-02 Nelson Harness but now my A/C is not working. Had my tuner get the fans going properly but still no A/C, the compressor will not kick on. Any help would be greatly appreciated

@joevk6274 Год назад

Actually, some 07-13s also had a 28" radiator, so the fans for one of those will bolt right in if you your 99-04 has the 28" radiator.

@curtthompson2787 Год назад

You said remove any wires already pinned to #42 and 33. What would be there already and will that disable something else?

@mrpanda790 Год назад

What OBD cable did you use to connect to the computer to reprogram the fans? I'm only finding the wireless hptuner obd2 connecter? I have a bmw the runs a obd2 to usb cable and wondering if that would suffice? TIA

@markashley8909 2 года назад

I have a 2005 suburban with fan and I have 2005 suburban with e fans do I still need a tune

@jesseesquivel6248 8 месяцев назад

Nice video bro I have a 2000 Chevy Silverado doing LS swap from a v6 to a v8 5.3 what year would I have to pull e fan and wire harness and I live in Texas so I need ac how that works I’m new to this pl help

@joelew81 2 года назад

I just pulled everything I needed from my 05 truck (rotted frame).. I have an 03 now. Can I just swap the pcm along with it ?? Or should I get mine tuned?... same truck only difference is the 05 in Not fully loaded & my 03 is.

@jerrygomezjr601 2 года назад

What's the part#/year of the fuse box cover.. I can't seem to find one ..all I could find is stock ones without the relay hole...

@jefffleming1743 Год назад

What is the other steps for the ac to work properly

@lovelife7421 Год назад

Did you have to upgrade your alternator?

@MrJuan9500 6 месяцев назад

I have a question before i remove the cable, what’s it for? and if there is no problem remplacing it?

@letsfixit251 Год назад

Its so clean its almost to much. Hath to drive it Scarcesly. Tip toe down the road in it lol

@miltonmiranda9900 6 месяцев назад

Can I do this to a 2000 gmc 4.3? Thank you

@jerryarmendinger3363 Год назад

So I got a 99 I did the wiring into the pins. But it isn’t working correctly what does the 99 need differently?

@tannergillen5553 2 года назад

Quick question what extra steps do you need to follow for the ac to be fully functional with an 02 yukon

@LawrenceTolman 2 года назад

Theres an "AC retrofit kit" available that changes out the pressure switch with a sensor, and you wire that into the ECM so it knows what the high side pressure is, and kicks on the fan accordingly. If you find my newer electric fan video, I detail this during the install.