PCM or ECM

[BigStrip]

or both? My 04 Denali does some weird stuff and I've been told its my computer, I get messages that says service tire monitor, stability sys disabled, my security light comes on randomly, my traction control light stays on, my home link for the garage door works randomly, and my keyless entry works but the features change by theirself (horn honks sometimes, lights flash sometimes, etc) Any ideas?

(I've tried taking the batt loose and all that jazz)

 

[JennaBear]

Probably your EBCM (electronic body control module).

 

[big_b_in_PA]

+1 I had the same problems with my 03 Denali, and it turned out to be the bcm. The dealership where I bought it from took care of it after I bought it, so I got very lucky, otherwise I would have paid through the nose to have them diagnose and fix it. They had it back in the shop four times in two months to try to diagnose the problem. Hopefully whoever you take it to will not take as long as mine did.
Good luck!

 

[BlackZ-HO]

just had my ecm fixed, cost me 900, my tahoe did the same shit saying service 4wheel drive and ish, sorry to hear the bad news man