GM bulletin 23-NA-008
What it saysThis technical bulletin provides repair information to correct a customer concern of DEF Pump Controller Update with DTCs P105A and/or P208A Set. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Feb 29, 2024, received Feb 21, 2023, about the electrical system — 2 documents under this number. It names 7 model years across Chevrolet and GMC (2019–2022). 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.
One page for every brand it was filed under. Each brand’s bulletins: Chevrolet · GMC.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis technical bulletin provides repair information to correct a customer concern of DEF Pump Controller Update with DTCs P105A and/or P208A Set.
Trouble codes it names: P105A P208A
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 23-NA-008 | Service bulletin | Feb 29, 2024 | 10251385 | PDF, 91 KB |
| 23-NA-008 | Service bulletin | Feb 1, 2023 | 10231899 | PDF, 153 KB |
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.
Model years it names
Source: as the manufacturer filed themChevrolet 5 model years
GMC 2 model years
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 databaseOwners of the 7 model years this bulletin names have filed 2,032 complaints with NHTSA since 2015. 1,307 of them name Engine, Electrical System, Fuel/Propulsion System — 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.
On the 2019 Chevrolet Silverado, the 143 owners who gave an odometer reading for Engine reported it at a median of 71,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
Could not turn the ignition key off beyond the Accessory position in order to turn the key completely off to remove the ignition key. The key would stick in the ON oor Accessory position. The problem was in the microswitch button on the console shifter, the front button is pushed in to enable shifting into the PARK position.
2022 GMC Canyon · Electrical System · filed with NHTSA Oct 6, 2026 · ODI 11769436
The contact owns a 2022 Chevrolet Colorado. The contact stated that the fuel gauge was providing an inaccurate fuel reading. The contact stated that the fuel gauge indicated that there was more fuel in the tank than there was. Additionally, the contact stated that the fuel gauge read Empty(E) intermittently while driving.
2022 Chevrolet Colorado · Electrical System · filed with NHTSA Sep 9, 2025 · ODI 11685913
The contact owns a 2022 Chevrolet Equinox. The contact stated while reversing at approximately 5 MPH, the vehicle stalled. While driving approximately 70 MPH, the vehicle was sputtering. The service vehicle now message was displayed. The vehicle was taken to the local dealer who was unable to duplicate the failure.
2022 Chevrolet Equinox · Engine · filed with NHTSA Feb 22, 2023 · ODI 11508593
In depth: 2022 Chevrolet Equinox fuel system problems → · 2022 Chevrolet Silverado engine problems → · 2022 Chevrolet Silverado electrical problems → · 2019 Chevrolet Silverado engine problems →
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 electrical system
Source: same model, same component group277 other manufacturer communications filed against these GM models under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| N262565450 | Service campaign | Oct 26, 2026 | Customer Satisfaction Program. Certain vehicles listed above may have a condition in which remanufactured high voltage battery packs were b… |
| N252529080 | Service campaign | Apr 1, 2026 | Service Update. Certain vehicles listed above may be missing a high voltage header plug on the RESS battery pack drive motor connector. Dea… |
| N252515590 | Service campaign | Jan 27, 2026 | Certain vehicles listed above, may have a condition in which the body-to-chassis ground strap may be corroded. Dealers will replace the grou… |
| 24-NA-166 | Service bulletin | Nov 7, 2025 | This technical bulletin provides repair information to correct a customer concern of DTC C1171 C1172 C1173 C1174 Tire Pressure Monitor Senso… |
| 24-NA-227 | Service bulletin | Nov 4, 2025 | This technical bulletin provides repair information to correct a customer concern of Vibration Rattle or Boom at 1800 to 2000 RPM. |
| 25-NA-061 | Service bulletin | Oct 3, 2025 | This technical bulletin provides a procedure to correct the condition of Driver or Passenger Rear Door Handle Will Not Fold In. |
| 18-NA-180 | Service bulletin | Sep 4, 2025 | This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information. |
| 25-NA-021 | Service bulletin | Jun 7, 2025 | This technical bulletin provides repair information to correct a customer concern of Radio Software Update W23E-178.1.2-M174-SQBR6-93.3. |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Chevrolet and GMC, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM 23-NA-008 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 23-NA-008 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 23-NA-008 cover?
The manufacturer filed it against 7 model years across 2 brands (Chevrolet and GMC): 2022 Chevrolet Colorado, 2022 Chevrolet Equinox, 2022 Chevrolet Express, 2022 Chevrolet Silverado, 2019 Chevrolet Silverado, 2022 GMC Canyon and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.