Manufacturer communication · Service bulletin · 4 brands

GM bulletin 99-09-40-005I

What it saysThis service bulletin provides information on availability for a seat belt extender. NHTSA’s full summary ↓

GM filed this with NHTSA as a service bulletin dated Jul 17, 2023, received Jul 28, 2023, about the seat belts. It names 421 model years across Chevrolet, GMC, Buick and Cadillac (2016–2024). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.

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ModelEmail address

What the bulletin says

Source: NHTSA's summary of the manufacturer's communication

This service bulletin provides information on availability for a seat belt extender.

Kind Service bulletin Manufacturer date Jul 17, 2023 Received by NHTSA Jul 28, 2023 Components Seat Belts

Document filed under this number

Document	Kind	Dated	NHTSA id	At NHTSA
99-09-40-005I	Service bulletin	Jul 17, 2023	10239755	not found

The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.

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Model years it names

Source: as the manufacturer filed them

Chevrolet 232 model years

Also filed against model years this site has no page for: 2024 Chevrolet 3500HD; 2016 Chevrolet 4500; 2017 Chevrolet 4500; 2018 Chevrolet 4500; 2019 Chevrolet 4500; 2020 Chevrolet 4500; 2022 Chevrolet 4500; 2017 Chevrolet 4500HD; 2018 Chevrolet 4500HD; 2019 Chevrolet 4500HD; 2020 Chevrolet 4500HD; 2021 Chevrolet 4500HD; 2022 Chevrolet 4500HD; 2023 Chevrolet 4500HD; 2017 Chevrolet 4500XD; 2018 Chevrolet 4500XD; 2019 Chevrolet 4500XD; 2020 Chevrolet 4500XD; 2021 Chevrolet 4500XD; 2022 Chevrolet 4500XD; 2017 Chevrolet 5500HD; 2018 Chevrolet 5500HD; 2019 Chevrolet 5500HD; 2020 Chevrolet 5500HD; 2021 Chevrolet 5500HD; 2022 Chevrolet 5500HD; 2023 Chevrolet 5500HD; 2018 Chevrolet 5500XD; 2019 Chevrolet 5500XD; 2020 Chevrolet 5500XD; 2021 Chevrolet 5500XD; 2022 Chevrolet 5500XD; 2019 Chevrolet 6500; 2019 Chevrolet 6500HD; 2020 Chevrolet 6500HD; 2021 Chevrolet 6500HD; 2022 Chevrolet 6500HD; 2023 Chevrolet 6500HD; 2024 Chevrolet Bolt EV; 2018 Chevrolet C3500; 2016 Chevrolet Caprice; 2017 Chevrolet Caprice; 2018 Chevrolet Caprice; 2016 Chevrolet Caprice Police Pursuit; 2017 Chevrolet Caprice Police Pursuit; 2016 Chevrolet Captiva; 2017 Chevrolet Captiva; 2018 Chevrolet Captiva; 2018 Chevrolet G4500; 2016 Chevrolet LOW Cab Forward 3500; 2017 Chevrolet LOW Cab Forward 3500; 2018 Chevrolet LOW Cab Forward 3500; 2019 Chevrolet LOW Cab Forward 3500; 2016 Chevrolet LOW Cab Forward 4500; 2017 Chevrolet LOW Cab Forward 4500; 2016 Chevrolet LOW Cab Forward 5500; 2017 Chevrolet LOW Cab Forward 5500; 2018 Chevrolet LOW Cab Forward 6500; 2016 Chevrolet N300; 2018 Chevrolet N300 and 10 more.

GMC 77 model years

2023 GMC Acadia 2022 GMC Acadia 2021 GMC Acadia 2020 GMC Acadia 2019 GMC Acadia 2018 GMC Acadia 2017 GMC Acadia 2016 GMC Acadia

Also filed against model years this site has no page for: 2024 GMC 3500HD; 2017 GMC G3500; 2018 GMC G3500; 2022 GMC Hummer EV Pickup.

Buick 44 model years

2019 Buick Cascada 2018 Buick Cascada 2017 Buick Cascada 2016 Buick Cascada 2024 Buick Enclave 2023 Buick Enclave 2022 Buick Enclave 2021 Buick Enclave

and 35 more on this site: 2020 Buick Enclave, 2019 Buick Enclave, 2018 Buick Enclave, 2017 Buick Enclave, 2016 Buick Enclave, 2024 Buick Encore, 2023 Buick Encore, 2022 Buick Encore, 2021 Buick Encore, 2020 Buick Encore, 2019 Buick Encore, 2018 Buick Encore, 2017 Buick Encore, 2016 Buick Encore, 2024 Buick Envision, 2023 Buick Envision, 2022 Buick Envision, 2021 Buick Envision, 2020 Buick Envision, 2019 Buick Envision, 2018 Buick Envision, 2017 Buick Envision, 2016 Buick Envision, 2024 Buick Envista, 2019 Buick LaCrosse, 2018 Buick LaCrosse, 2017 Buick LaCrosse, 2016 Buick LaCrosse, 2020 Buick Regal, 2019 Buick Regal, 2018 Buick Regal, 2017 Buick Regal, 2016 Buick Regal, 2017 Buick Verano, 2016 Buick Verano.

Also filed against model years this site has no page for: 2020 Buick Lacrosse.

Cadillac 68 model years

2019 Cadillac ATS 2018 Cadillac ATS 2017 Cadillac ATS 2016 Cadillac ATS 2018 Cadillac ATS-V 2017 Cadillac ATS-V 2016 Cadillac ATS-V 2024 Cadillac CT4

Also filed against model years this site has no page for: 2021 Cadillac CT6; 2017 Cadillac ELR; 2024 Cadillac Redundant Lyriq; 2018 Cadillac XT4; 2016 Cadillac XT5; 2020 Cadillac XTS.

A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.

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What owners reported

Source: NHTSA complaint database

Owners of the 340 model years this bulletin names have filed 41,928 complaints with NHTSA since 2015. 48 of them name Seat Belts — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.

Both 2nd row seatbelt tensioners failed within four years of owning the vehicle (bucket seats) with an estimated cost of $500 to fix. We were advise that this is the result of using a recommended child car seat. It is not acceptable or safe to have a seat belt system that cannot be used properly after a car seat has been used and removed
2018 Chevrolet Suburban · Seat Belts · filed with NHTSA Feb 15, 2022 · ODI 11452059

I'm writing to complain about the proposed temporary resolution of the recall. I received a letter today advising me that repair parts were unavailable and that I should simply not use the third row seats until the inspection/repairs are completed. Like many people who own Suburbans, I bought this vehicle because we are a family of six.
2021 Chevrolet Suburban · Seat Belts · filed with NHTSA Oct 4, 2022 · ODI 11487872

Filed second time. Recall repair is defective! Recall repair has left seat belt tensioner cable exposed and flopping! Metal bits and pieces are now on carpet and area around seat belt foundation and lower replaced cover area. The replaced rubber cover (92507580) is ripped and ripping more at lower connection of exposed tensioner cable.
2016 Chevrolet SS · Seat Belts · filed with NHTSA May 19, 2017 · ODI 10990669

A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.

More bulletins about the seat belts

Source: same model, same component group

5 other manufacturer communications filed against these GM models under the same component group (seat belts), newest first.

Number	Kind	Dated	NHTSA’s summary
24-NA-257	Service bulletin	Dec 17, 2024	This technical bulletin provides a procedure to correct Rear Seat Belt Bezel Falls Off.
N242455780	Service campaign	Aug 19, 2024	Service Update. On certain vehicles, the rear outboard seat belt(s) may be slow to retract into the C-pillar. Dealers are to inspect, and i…
24-NA-147	Service bulletin	Aug 5, 2024	This service bulletin provides information on regular inspection of the Seat Belt Lap Anchor.
N222393100	Service bulletin	Feb 20, 2024	Customer Satisfaction Program - Certain vehicles may have a condition in which the second-row center seatbelt buckle falls between the seats…
PIC6501B	Service bulletin	May 18, 2023	This Preliminary information communicates Instructions to properly open the upper IP bin door and reset the Inertia Lock if needed.

Quote the number at the service desk. It is what the dealer’s system is keyed on.

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Common questions

Source: NHTSA, 49 CFR 579.5

Is GM 99-09-40-005I a recall?

No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.

Is the 99-09-40-005I repair free?

Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way. Every GM warranty extension on file lists the ones GM has filed.

Which vehicles does 99-09-40-005I cover?

The manufacturer filed it against 421 model years across 4 brands (Chevrolet, GMC, Buick and Cadillac): 2019 Buick Cascada, 2018 Buick Cascada, 2017 Buick Cascada, 2016 Buick Cascada, 2024 Buick Enclave, 2023 Buick Enclave and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.

From here

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