04 Denali XL- sold with 170,000 on it. No mods, fluid changes only.
04 Yukon sle- sold with 178,000. No mods, fluid changes only
03 Tahoe LS- still driving, 208,000, no mods, fluid and filter changes only
A lot of times, the service 4WD is one of two things. You replaced the motor, so that’s one. The other is the switch itself. There was a cold solder joint problem that created wonky problems. I’ve had one of each problem on my trucks. On one the encoder motor fixed it, and on the other it was...
There are a couple youtube videos that point to a frame ground that's the primary cause of the ABS light issue. Browse that and see if it solves your problem.
I had this problem in my 03 Denali back in the day. The problem was the carrier bearings. From what I understand it was a fairly common issue on the Denalis and Escalades. I did the work myself and it wasn't that bad. Only took a couple hours to drop the Diff and replace the bearings and...
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