2021 Chevy Tahoe, Suburban Owners Experience Issues With Underseat Wiring
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General Motors debuted the all-new 2021 Chevy Tahoe and 2021 Chevy Suburban side-by-side in a special event in downtown Detroit last December, ushering in fresh designs for the exterior and interior, the latest tech features, a new diesel engine option, and fresh underpinnings. Now, however, it looks like some owners are experiencing issues with the new SUVs’ underseat wiring.
According to one owner, a warning message would appear intermittently on the Driver Information Center in the gauge cluster of her 2021 Chevy Tahoe High Country, which would read “Service Safety Restraint System.” After bringing the vehicle in to her local dealer, the owner was informed that the cable connecting to the airbag control module under the driver’s seat was made too short at the factory, and that any seat adjustments would cause the wire to come loose. The dealer informed the owner that as soon a replacement cable was available and installed, the issue should be resolved.
General Motors has likely issued a Technical Service Bulletin (TSB) to address the issue.
As a reminder, the 2021 Chevy Tahoe and 2021 Chevy Suburban introduce brand-new generations for both nameplates, with the Tahoe entering its fifth generation, and the Suburban entering its twelfth generation. Both full-size SUVs are based on the GM T1 platform, the same bones as the fourth-generation Chevrolet Silverado and fifth-generation 2021 Cadillac Escalade. Both models also come with completely redesigned interior treatments.
2021 Chevy Tahoe RST pictured here.
Under the hood, the 2021 Chevy Tahoe and 2021 Chevy Suburban offer three engine options, including the naturally aspirated 5.3L V8 L84, the naturally aspirated 6.2L V8 L87, and the new-for-2021 3.0L I6 LM2 turbodiesel Duramax. All three engines pair with GM’s Hydra-Matic 10L80 10-speed automatic transmission.
Both the 2021 Chevy Tahoe and the 2021 Chevy Suburban are produced at the GM Arlington plant in Arlington, Texas.
2021 Chevy Tahoe RST pictured here.
Are you a 2021 Chevy Tahoe or 2021 Chevy Suburban owner who has also experienced an issue with your vehicle’s underseat wiring? Let us know about it in the comments, and make sure to subscribe to GM Authority for more Chevrolet Tahoe news, Chevrolet Suburban news, Chevrolet news, and around-the-clock GM news coverage.
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My 2021 Tahoe has been in the shop for a week and a half for the ‘service safety restraint system‘ error. I was told that the new part was ordered and arrived yesterday (10/9) and should be ready to pick up on Monday. Hopefully this is the end of the saga for me.
I have a 2021 GMC Yukon Denali. Same issue. Dealer had no idea, thought it was a software thing. I need to show them this article now so that they can fix it.
Anyone having problem with 2021 Tahoe’s radio constantly cutting out with Spotify or other streaming services whether plugged in or via blue tooth?
I had this problem twice so far.
Darrick, did you take it in? If so what was their solution, or was it we can’t duplicate excuse?
Bought a 2021 Suburban z71 on 10/7. Driven less than 100 miles when “service safety restraint system” message appeared. Been in service since 10/9 with no update as to when it will be fixed.
Same this happen to me. They blame it on my dashcam which wasn’t hook up at that time. I bought mines sept. 22 and the same day that error pop up
I have 800 miles and the seat message just started. I had something else weird happen a week ago. Had android auto on and got a text message. The left side speakers all quit working until the vehicle was off for a while. I had shut off the messages so they would not appear on the display. Might have caused something werird. Service manager thought it was weird. I like mine but feel it is a bit mushy and doesnt go straight down the road like my HD2500 does
I am having this same issue right now. It started the day i bought it. I took it back and they blame the issue on my dashcam, i told them it couldnt be the dashcam because i just put it in and it was not plug it. Today I was driving from Memphis to Atlanta, The radio went black and the airbag light came on once again. The dealership in Alabama clear the code and told me what was wrong. This going to be a major problem, I cant keep going to dealership trying to get this fix. Plus what if I get into a accident and the airbad dont deploy?
UPDATE: My 2021 Tahoe LT was in the shop for a week and a half for the ‘Service Safety Restraint System’ light. Dealer said GM has new replacement part ready. It took about 3 days for the part to arrive, but it was installed and I picked up the Tahoe yesterday. So far so good. Several short trips around town with no error light. Description for the service work is as follows….
“Customer returning for same issue as before. Warning on dash for safety restrain warning. Check and Advise. Perform diagnosis, found dtc b14dc-1b to be stored, observe and found deployment loop 13 to be reading 25 ohms. refer to pit5759e. Splice in new connector for drivers seat inboard inflator module per updated bulletin. Verify resistance value for deployment loop 13 – 2.54 ohms”
Hope this helps.
I am having this issue with my 2020 Silverado 2500HD LT Crew cab. Took it in, replaced the clock spring, was good for a couple weeks, and came back on this weekend.
3 weeks. That’s how long it took for my Tahoe to get fixed. Took it in 9/24 for the air bag alert. Was told of the connector issue being back ordered. Didn’t know when it would come in. Then randomly, the dealer called today saying it was ready for pickup. 22 days all in
Yes my 21 Tahoe has the service restraint system light
Coming on too 700 miles