'08 TBSS E67 fan control?

[ScarabEpic22]

FYI Ive seen an aluminum radiator for the TBSS already, was a year or so ago but no integrated fans.

I know you've been saying this for a long time JAY4SPEED, trying to reiterate it because I now have an 08 that needs efans soon...just gotta make sure it doesnt overheat when towing because I will be towing ~4000lbs a lot more this summer than previous ones dragging the boat. As for an external controller, Flexalite makes one I like a lot and if I hadnt got my SS Id probably be using it on my 02 for efans.

[BigTex]

..If I can't construct a workaround in EFIlive, then I may have to get HPT to tune my own truck or go with an external fan controller...

I don't think HPT can change the 08 TBSS to efans either, can they?

Scarab - I burned up 3 Flexalite controllers with my SilveradoSS fans. It worked great normally, but I was paranoid waiting for them to fail. I finally went to a multi relay setup.

[BigTex]

So it is as simple as a "system" segment swap from another E67 vehicle with the same OS? Anyone know what that is?

As mentioned earlier in this thread, the 08 Impala SS has the same OS, so that may be the ticket. I just couldn't find an EFI file for an 08 ImpSS. I looked all over the normal repositories and even trolled around several Imp forums looking for one.

[ScarabEpic22]

I don't think HPT can change the 08 TBSS to efans either, can they?

Scarab - I burned up 3 Flexalite controllers with my SilveradoSS fans. It worked great normally, but I was paranoid waiting for them to fail. I finally went to a multi relay setup.

I see, interesting cauz I know a guy thats been using one on LS1 efans on his I6 up in Canada for like 2+ years.

AFAIK HPT cant do it either. Like the Impala idea, maybe copy the fans segment over just might be the ticket. Prob is it'd have to be done manually with a hex editor for every OS to have it work, and the temp adjusting would prob have to be done inside the Impala file then copy the segment with changes back over. Tricky, but doable and worth it if segment swap works.

[Chevy366]

Someone needs to dispel the myth that e-fans are bad for towing , they are not , at least not that I have found .
A 1/2 ton Chevy/GMC has e-fans and are designed for towing , in fact became standard in 05 on them , large rad and e-fans , for towing .
So , e-fans work well when towing if done right !

[1BadAction]

There are a very, VERY limited number of situations where a sub-par E-fan wouldn't function as good as a mech fan. Towing something near the vehicles max rating, up a continuous grade (like through the mountains) in a lower gear is the only place I can think of where a mechanical fan do better than an electric. anywhere else, the mech fan is piss poor compared to an E-fan, especially down here dragging a boat to the beach through traffic.

anyhow, glad I have an 07. let me know if you need any help.

[GMPX]

If I recall there is about 150 tables and parameters related to fan control in the E67, that is why we have not added them in.
Sure you might be able to tell the ECM what fan type it has, but what about the other 100 parameters related to diagnostic and correct control, I'd be happier if all that was in there, but I don't particularly feeling like adding in all those fan calibrations over 70 OS's!

Cheers,
Ross

[ScarabEpic22]

Someone needs to dispel the myth that e-fans are bad for towing , they are not , at least not that I have found .
A 1/2 ton Chevy/GMC has e-fans and are designed for towing , in fact became standard in 05 on them , large rad and e-fans , for towing .
So , e-fans work well when towing if done right !

There are a very, VERY limited number of situations where a sub-par E-fan wouldn't function as good as a mech fan. Towing something near the vehicles max rating, up a continuous grade (like through the mountains) in a lower gear is the only place I can think of where a mechanical fan do better than an electric. anywhere else, the mech fan is piss poor compared to an E-fan, especially down here dragging a boat to the beach through traffic.

anyhow, glad I have an 07. let me know if you need any help.

Very true, but I want make sure I can tow 6600lbs up the mountains in the NW in the summer with 0 problems. Maybe Im just paranoid, but even with the stock mechanical fan clutch on my 02 it starts to overheat in 100F weather towing 4000lbs up a 10mi grade of about 3-5% grade. Its a hill that all the RVs always overheat on and cars have cooling issues in the summer.

Also, GM did extensive testing on the TrailBlazer platform and found they could not get an efan setup to cool all the time so they were forced to revert back to a mechanical clutch setup. Fullsize trucks have larger radiators which helps alleviate this problem and GM couldnt shove a big enough one in our trucks to make it work.

[1BadAction]

The fan in the 06 and 07s can be made to come in earlier than they do stock, I think since yours is a true mechanical fan, you're stuck with how they work. Something that would help, is throwing the biggest trans cooler you can fit on there and bypass the one in the radiator. That will take a good bit of cooling load of the rad. Either way, unless you find some special E-fan, I don't think it'll do what you want it to.

GM put mechanical fans on these because they wanted that 6500lb tow rating, and E-fans couldn't cut the mustard on their grade test.

[BigTex]

If I recall there is about 150 tables and parameters related to fan control in the E67, that is why we have not added them in.
Sure you might be able to tell the ECM what fan type it has, but what about the other 100 parameters related to diagnostic and correct control, I'd be happier if all that was in there, but I don't particularly feeling like adding in all those fan calibrations over 70 OS's!

Cheers,
Ross

Ross, I truly do understand why you would not want to spend that much effort for this issue. But what about a segment swap from another vehicle with the same OS? Any help you can give would really be appreciated.

I have 12618164 for my OS. All you other 08 guys have the same one?