Chevrolet bulletin 20-NA-182
What it saysThis service bulletin provides a procedure to replace the brake line pressure switch to correct a customer concern of a brake booster pump motor that runs at all times even after the ignition is turned off. NHTSA’s full summary ↓
Chevrolet filed this with NHTSA as a service bulletin dated Jun 22, 2023, received Jul 11, 2023, about the electrical system. It names 5 model years (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.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis service bulletin provides a procedure to replace the brake line pressure switch to correct a customer concern of a brake booster pump motor that runs at all times even after the ignition is turned off.
Trouble codes it names: C0021 all 1 read from the document itself; NHTSA’s summary names none
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 20-NA-182 | Service bulletin | Jun 22, 2023 | 10239076 | PDF, 99 KB |
What the document itself lists
The manufacturer titles it “Brake Booster Pump Motor Runs at All Times Even After Ignition Turned Off - DTC”.
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 19407495 | Bulletin No.: 20-NA-182 June, 2023 Page | 1 | eBay Motors → |
Read by machine from the document NHTSA serves (3 pages), read Sep 30, 2026. A part number is shown only where it matches Chevrolet’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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 themAlso filed against model years this site has no page for: 2019 Chevrolet 6500.
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 4 model years this bulletin names have filed 3,366 complaints with NHTSA since 2015. 980 of them name Electrical System, Service Brakes — 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 122 owners who gave an odometer reading for Service Brakes reported it at a median of 8,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
Vehicle lost engine power on the road. Light display came on stating engine reduce power. It would not pull the trailer. Had to pull over and the display went away only to appear again later. We brought vehicle to chevrolet dealer . The part needed to hopefully fix is on backorder. There is also recall with no available remedy.
2020 Chevrolet Silverado · Service Brakes · filed with NHTSA Jul 10, 2025 · ODI 11672450
This is my second compliant, on 5/7/20, after my shift ended. The truck would not start. I call the sales person, we went over several steps and it still would not start. I called on star. She said will do a diagnostic. When she started every thing well out. I call back by phone after an half hour..they sent me a jumper.
2020 Chevrolet Silverado · Electrical System · filed with NHTSA May 12, 2020 · ODI 11324334
Started vehicle and all of the brake system warning lights were on. Vehicle stated that I could drive 43 mph with limited braking ability and limited steering. Basically the power assisted brakes and steering would not work. The vehicle was parked at my place of employment. Called the dealer to ask for suggestions.
2022 Chevrolet Silverado · Service Brakes · filed with NHTSA Dec 5, 2022 · ODI 11496123
In depth: 2022 Chevrolet Silverado electrical problems → · 2022 Chevrolet Silverado brake problems → · 2021 Chevrolet Silverado electrical problems → · 2020 Chevrolet Silverado electrical 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 group218 other manufacturer communications filed against these Chevrolet 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… |
| 18-NA-180 | Service bulletin | Sep 4, 2025 | This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information. |
| 22-NA-083 | Service bulletin | May 17, 2025 | This service bulletin provides Requirements for Replacement of the Dual Mode Cord Set Under Warranty. |
| 23-NA-151 | Service bulletin | May 16, 2025 | This service bulletin and criteria within are to determine the internal state of the High Voltage Battery and core return shipping method. |
| PIE0753I | Service bulletin | May 15, 2025 | This engineering information (EI) will assist GM to recover a small number of electric vehicle battery packs from customer-owned vehicles in… |
| 25-NA-044 | Service bulletin | May 14, 2025 | This service bulletin provides information for dealers/technicians on SPS2 Hybrid/EV Battery Data Retrieval for Service High Voltage DTCs. |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Chevrolet, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Chevrolet 20-NA-182 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 20-NA-182 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 20-NA-182 cover?
The manufacturer filed it against 5 model years: 2022 Chevrolet Silverado, 2021 Chevrolet Silverado, 2020 Chevrolet Silverado, 2019 Chevrolet Silverado, 2019 Chevrolet 6500. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.