'22 Sierra 2500HD.
Just want to confirm,
Am about to replace the Trailer Brake Control Module (the thing above the spare tire), and then may replace the Trailer Brake Controller (in-dash device).
I understand, at least for the Module replacement, that the vehicle battery needs to be disconnected.
So, a couple questions - Is it necessary to disconnect the battery for both procedures? - Is there a difference, in any resultant electronic issues, on how long a battery is disconnected? IE does it matter if the battery is disconnected for an hour as opposed to over night? - And, for replacement of both items, is there a requirement to "re-boot" any system(s). I have been led to believe that the Module is less of an issue than the Controller, but it has been suggested that a trip to the dealer may be necessary after the Controller is replaced.
Any advice is welcome.
Marv
I agree with Tim. As tech heavy as engines are these days, no way I’d be an early buyer of the new 6.6. Of course, I bought my ‘26 Denali w/the 6.2 after dumping my Tundra with it’s defective 3.5 liter imploding engine disaster, so I’m a little gun-shy. That said, my 6.2 has been rock solid. I don’t drive it like I do my BMW Z4 M40i, but I don’t baby it either. I got a V8 for a reason. But I’m averaging 18 around town and 22 highway. I have seen 24 highway as well when I wasn’t loaded up heavy. Considering my Tundra with the twin turbo V6 only got 14.5 in town and 17 on the road, I’ll take the 6.2 all day, every day. If I were you, I’d grab a ‘26 while you can. Inventories are probably gonna start dropping and I’ll bet the deals will start looking sweeter as well.
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