Hi new member here,
Can someone tell me where the PCM is located on this vehicle?
Thanks!
Mark

Why are we going after the PCM? Many times these modules are replaced which never had a problem.

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Home >> Buick Truck >> 2005 >> Rendezvous AWD V6-3.6L VIN 7 >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Locations

Engine Control Module: Locations

Engine Control Module (ECM):

pro multis · About Operation CHARM

Thank you so much. It'* really not the engine performance of any sort. A freakin' squirrel got into the engine compartment and chewed up a bunch of wires. At that point, the engine still ran good but the dash started spewing error messages and all the gauges stopped working. A local dealer fixed a majority of the wiring but the gauges still are not working except the speedo, that works now (that data feed from the BCM?). Dealer basically said that'* all they could do (great, thanks..). I'm thinking the data bus line from the PCM is still compromised somewhere. Dealer also installed a spare rebuilt dash panel I had that was supposedly programed for my VIN by DELPHI but I guess that could be an issue.

A dealer did the work and can't fix what'* left?

That'* correct. He'* blaming the rebuilt dash panel. I have the original I can send out to be eval'd to check it'* functionality. I think I found a company that does this as a business but open to any other opinions / suggestions.

Let me say though that the original didn't work after they fixed the wiring so.....

Seems like a red herring to me.

1. Car works fine
2. Squirrel
3. Car sad
4. Fix some wiring
5. Car happy, gauges broken
6. Swap dash
7. Car happy, gauges broken

. . . right?

If so then there is no amount of dash swapping that will fix it. From what I know if this situation, more wiring needs to be fixed the rest of the way.

Thanks for the reply. Yes, basically correct. The one thing about the replacement dash is the mileage that was programmed into it. As it is several years old, the mileage on that dash shows about 30K less miles. Besides the dash, does the PCM or BCM log miles? If so, the new dash wouldn't agree with that log and knowing the Feds wouldn't like that, would disable the new dash.
Anyway, the wiring is why I asked for the PCM location, to check the connections between the dash & PCM, looks like all the gauge etc data with exception of the speedo comes to the dash via the PCM. I figured this studying the wiring diagrams for the vehicle. Hoping the to find another compromised wire (*).

I would like to say this has been a great vehicle for us, over 220K and still runs excellent; everything (besides the dash now) still works; well the power mirror are a little sticky but heck, not too bad.

They can hold up well when they are taken care of!