A thank you to all in advance. So, I'm driving home from work in my 2004 Yukon XL Denali when, out of the clear blue, it goes into LHM. This vehicle has 240,000 miles on the odometer and I have owned it since new. The only other time LHM mode has happened was last summer when I was driving home from Texas. A new throttle body was installed and we were on our way.
Fast forward to last week. I managed to get her home, put the scanner on it, and found that it indicated a faulty TPS. Kind of odd for a virtually new throttle body, but I am sure not unheard of. I installed a new TPS and life has been miserable ever since.
No supply coming from the alternator, a couple of blown fuses, and total confusion on my part. I picked up and installed a new alternator, figuring that the original had 240K on it. By the way, new alternator, not reman. Replaced the fuses, fired her up, and...……...same result. Now I have learned that the PCM controls the alternator so I'm guessing that there is a problem with the PCM.
Can the PCM be removed, taken to a shop, and re-flashed, or am I doomed to having the vehicle towed to a shop? As a career aircraft mechanic, not much challenges me, but I am more than happy to admit defeat on this one. Help, please!
Fast forward to last week. I managed to get her home, put the scanner on it, and found that it indicated a faulty TPS. Kind of odd for a virtually new throttle body, but I am sure not unheard of. I installed a new TPS and life has been miserable ever since.
No supply coming from the alternator, a couple of blown fuses, and total confusion on my part. I picked up and installed a new alternator, figuring that the original had 240K on it. By the way, new alternator, not reman. Replaced the fuses, fired her up, and...……...same result. Now I have learned that the PCM controls the alternator so I'm guessing that there is a problem with the PCM.
Can the PCM be removed, taken to a shop, and re-flashed, or am I doomed to having the vehicle towed to a shop? As a career aircraft mechanic, not much challenges me, but I am more than happy to admit defeat on this one. Help, please!