Does the part number have to match?

[ZRated]

Hello all,

For YEARS I have been dealing with a constant issue of the 4x4 dial light going out and losing 4wd.... After spending THOUSANDS on new actuators, encoders, pulling and re-seating ground wires, tracing wires, new battery cables, new dials, etc. etc., only to have it come on for a few days and then stop working...I have determined that my TCCM is bad...It is literally the last component to replace as I have metered every single wire going into and out of it... It gets power but just works sometimes...

The question, 24237151 is the part number on the TCCM... I have yet to find this number in any search on the internet to have replaced... I have seen multiples of every other number and they look identical. Is this something that has to match EXACTLY or can another be programmed and installed? This TCCM loss of comms issue is causing all sorts of other issues like no more remote start, the variable timing will now work, etc. because the check engine light is on.

 

[Fless]

It would be helpful to know some vehicle details -- year, make, model, engine, etc. Consider putting it in your signature so it's always there.

 

[ZRated]

It would be helpful to know some vehicle details -- year, make, model, engine, etc. Consider putting it in your signature so it's always there.

2007 Tahoe LT 4WD 5.3L.

 

[Fless]

Some of us are curious about what specific code(s) are being set when the 4wd doesn't work. How's the ground on the TCCM?

Suggest going to www.gmpartsdirect.com, enter your VIN, and see if the newest part number is available there for your VIN; part numbers are constantly being updated and old ones superseded. Once you have the updated part number you can search the internet for a part and availability.

Rock Auto is also a good source for parts. Looks like a new one would require programming.

 

[Rocket Man]

What is a TCCM? I see a TCU (transmission control unit) on Rock Auto and GM parts Giant, PN 24252114.

 

[Fless]

What is a TCCM? I see a TCU (transmission control unit) on Rock Auto and GM parts Giant, PN 24252114.

Transfer Case Control Module

 

[Rocket Man]

Transfer Case Control Module

View attachment 453279

Oh yeah duh. I forgot those exist, coming from my 02 with an NVG249 transfer case which has no electronics so no TCCM. I guess the 08 I just bought has one though.