'18 Yukon XL Key Fob/Keyless Entry Issues

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

THarber

Full Access Member
Joined
Jun 4, 2021
Posts
307
Reaction score
277
Try the antenna as mentioned above. I had similiar issues, replaced the antenna and all is good. It was $23 on Rock auto and took 10 mins to replace.
 

undy

Full Access Member
Joined
May 13, 2013
Posts
240
Reaction score
430
Location
Virginia and Florida
I'm having similar problems with my 2019 Yukon Denali. A lot of time I've got to move/jiggle the FOB around to unlock the vehicle in the passive unlock mode. I want to try the antenna fix but don't see the GM part number anywhere in my search. Can someone provide me with GM's part number and some location pics/vids? Thanks...
 

undy

Full Access Member
Joined
May 13, 2013
Posts
240
Reaction score
430
Location
Virginia and Florida
Did a little more research... In 2020 GM did a TSB about poor FOB performance. It simply stated, If your FOB's working like crap replace the radio antenna amplifier. End of TSB... I called several dealers and they ran my VIN. They said that my vehicle takes one of two different amplifiers, a ...86 or ...89. I have to pull my old one out and cross the number to one of the new numbers. There's no ordering it an advance.
 

lbenson

Member
Joined
Mar 4, 2021
Posts
76
Reaction score
53
A bit late to post but I've had both issues the OP had.

Key fob range was awful and the linked forum post on the previous page covers that. I replaced the receiver in the rear of the truck (cheap part, less than $100) and that fixed it right away. No programming at all, just plug and play.

As far as the trailer service error message... I once had it beep for about half of a 1000 mile roadtrip. Nothing much after that for a few years and recently beeped a number of times on a short drive but nothing since then. Curious to hear what fixed that problem.
 

Forum statistics

Threads
132,307
Posts
1,865,712
Members
96,895
Latest member
EGDinSD
Top