Anyone else had this problem?
05-26-2019, 05:47 PM
#1
Advanced
Thread Starter
Anyone else had this problem?
2014 M7 vert — 14,000 one owner gently driven miles. No problems until check engine light on, gear display gone. Rev match not working with gear not displaying — not recognizing what gear it was in. Dealer contacted GM Tech: advised to replace gear sensor and magnet. Both located on top of transmission at rear of vehicle. Had to drop transmission. 15 hr. job equated to ~ $500 in parts + $2,000 labor.
05-26-2019, 07:40 PM
#2
Moderator
First I've heard of.
05-27-2019, 09:35 AM
#5
Drifting
I had something similar. There was a code logged. Dealership was able to reset the code and all had been well since. If it was a latched code, then specific work would need to be done. I was fortunate.
I had had no gear indication
back up camera
cruise control
rev match
amd a couple other things I don’t recall.
I had had no gear indication
back up camera
cruise control
rev match
amd a couple other things I don’t recall.
05-27-2019, 07:15 PM
#6
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Ain't electronics great... when they work?! Hopefully it is merely a glitch as with JeepS. Many of various sorts have been reported over the years, never to return after a "reboot." 
All the best.
All the best.
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DELKDL (05-27-2019)
05-27-2019, 07:23 PM
#7
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Thread Starter
Threw three codes and they claimed they couldn’t re-set them, so had to ask GM Tech for advice. Don’t like going to the dealership, but nobody else locally would touch it. Hopefully, I wasn’t snookered. Have driven it twice for a total of about 50 miles since — so far, so good. Knock on wood!
05-27-2019, 10:24 PM
#8
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Hope whatever the dealer did does in fact fix the problem for a long time.
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DELKDL (05-28-2019)
05-28-2019, 11:20 AM
#10
Racer
05-28-2019, 11:48 AM
#11
Safety Car
Likely all the bits contained in part #14 and up thru part #4 in the diagram above. I don't think you can replace any of that without dropping the transmission
My reverse cam and reverse lights stopped working, but everything else was fine. I had no codes. Thus only part #15 (red arrow) which is the reverse sensor needed to be replaced. I did it myself on jack stands, very easy and super cheap thankfully.