OEM Trailer Brake Control Switch for 2019-2025 Cadillac, Chevrolet, & GMC - Rear
$
129
.95
30-DayReturns
6-monthWarranty
100%Money-Back
Condition: Excellent (A) — like new, minimal to no wear
Professionally inspected and tested.
Product Notes Read before buying
This is a used part in good condition. This park switch fits vehicles with the 6.6L engine, rear-wheel drive, and option code 4EC.
This part may require programming by a qualified technician to function correctly. Additionally, multiple versions of this switch may exist for different trim levels (e.g., base trims vs. AT4/Denali). Please verify that the OEM number 86515222 matches your vehicle's original part to ensure compatibility.
This part may require programming by a qualified technician to function correctly. Additionally, multiple versions of this switch may exist for different trim levels (e.g., base trims vs. AT4/Denali). Please verify that the OEM number 86515222 matches your vehicle's original part to ensure compatibility.
Why Buy Used OEM Parts?
Checked & Tested
We check and test every used part before we sell it. It may show some wear, but it works and is ready to install.
Original Equipment
This is the same part your vehicle came with from the factory. It fits and works just like the original — because it is one.
Works Like New
A few marks on the outside don't change what's inside. The part works the way it should.
Big Savings
Pay 50–80% less than buying new. Same factory part, much lower price.
Not sure? Ask Wrenchy — Your Parts Assistant.
Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.
Vehicle Fitment Guide
This part fits the following vehicles:
Cadillac
1 model(tapclick to hide)
Escalade
2022-2024
(tapclick to hide)
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| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 2022 - 2024 |
Chevrolet
5 models(tapclick to hide)
Colorado
2023-2024
(tapclick to hide)
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| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 2023 - 2024 |
Silverado 1500
2019-2024
(tapclick to hide)
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| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 2019 - 2024 |
Silverado 2500 HD
2020-2025
(tapclick to hide)
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| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Custom | Crew Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| Custom | Extended Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| LT | Crew Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| LT | Crew Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| LT | Extended Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| LT | Extended Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| LT | Standard Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| LT | Standard Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| LTZ | Crew Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| LTZ | Crew Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| LTZ | Extended Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| LTZ | Extended Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| WT | Crew Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| WT | Crew Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| WT | Extended Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| WT | Extended Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| WT | Standard Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| WT | Standard Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| Custom | Crew Cab Pickup | 2021 - 2025 | V8 6.6L DIESEL Turbo | - |
| Custom | Extended Cab Pickup | 2021 - 2025 | V8 6.6L DIESEL Turbo | - |
| WT | Crew Cab Pickup | 2021 - 2025 | V8 6.6L FLEX | - |
| WT | Extended Cab Pickup | 2021 - 2025 | V8 6.6L FLEX | - |
| WT | Standard Cab Pickup | 2021 - 2025 | V8 6.6L FLEX | - |
| LT | Crew Cab Pickup | 2024 - 2025 | V8 6.6L FLEX | - |
| LT | Extended Cab Pickup | 2024 - 2025 | V8 6.6L FLEX | - |
| LT | Standard Cab Pickup | 2024 - 2025 | V8 6.6L FLEX | - |
Applies to every configuration above: RWD | Automatic
Silverado 3500 HD
2020-2025
(tapclick to hide)
Swipe left/right to see more info
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | Cab & Chassis | 2020 - 2025 | V8 6.6L | - |
| LT | Cab & Chassis | 2020 - 2025 | V8 6.6L | - |
| LT | Cab & Chassis | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| LT | Crew Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| LT | Crew Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| LT | Extended Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| LT | Extended Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| LT | Standard Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| LT | Standard Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| LTZ | Crew Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| LTZ | Crew Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| WT | Cab & Chassis | 2020 - 2025 | V8 6.6L | - |
| WT | Cab & Chassis | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| WT | Crew Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| WT | Crew Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| WT | Extended Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| WT | Extended Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| WT | Standard Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| WT | Standard Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| WT | Cab & Chassis | 2021 - 2025 | V8 6.6L FLEX | - |
| WT | Crew Cab Pickup | 2021 - 2025 | V8 6.6L FLEX | - |
| WT | Extended Cab Pickup | 2021 - 2025 | V8 6.6L FLEX | - |
| WT | Standard Cab Pickup | 2021 - 2025 | V8 6.6L FLEX | - |
Applies to every configuration above: RWD | Automatic
Suburban
2021-2025
(tapclick to hide)
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| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 2021 - 2025 |
GMC
6 models(tapclick to hide)
Canyon
2023-2024
(tapclick to hide)
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| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 2023 - 2024 |
Sierra 1500
2019-2024
(tapclick to hide)
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| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 2019 - 2024 |
Sierra 2500 HD
2020-2025
(tapclick to hide)
Swipe left/right to see more info
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | Crew Cab Pickup | 2020 - 2021 | V8 6.6L DIESEL Turbo | - |
| Base | Crew Cab Pickup | 2020 - 2021 | V8 6.6L | - |
| Base | Extended Cab Pickup | 2020 - 2021 | V8 6.6L | - |
| Base | Extended Cab Pickup | 2020 - 2021 | V8 6.6L DIESEL Turbo | - |
| Base | Standard Cab Pickup | 2020 - 2021 | V8 6.6L | - |
| Base | Standard Cab Pickup | 2020 - 2021 | V8 6.6L DIESEL Turbo | - |
| SLE | Crew Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| SLE | Crew Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| SLE | Extended Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| SLE | Extended Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| SLE | Standard Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| SLE | Standard Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| SLT | Crew Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| SLT | Crew Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| SLT | Extended Cab Pickup | 2020 - 2023 | V8 6.6L | - |
| SLT | Extended Cab Pickup | 2020 - 2023 | V8 6.6L DIESEL Turbo | - |
| Base | Crew Cab Pickup | 2021 | V8 6.6L FLEX | - |
| Base | Extended Cab Pickup | 2021 | V8 6.6L FLEX | - |
| Base | Standard Cab Pickup | 2021 | V8 6.6L FLEX | - |
| Pro | Crew Cab Pickup | 2022 - 2025 | V8 6.6L FLEX | - |
| Pro | Crew Cab Pickup | 2022 - 2025 | V8 6.6L DIESEL Turbo | - |
| Pro | Crew Cab Pickup | 2022 - 2025 | V8 6.6L | - |
| Pro | Extended Cab Pickup | 2022 - 2025 | V8 6.6L FLEX | - |
| Pro | Extended Cab Pickup | 2022 - 2025 | V8 6.6L DIESEL Turbo | - |
| Pro | Extended Cab Pickup | 2022 - 2025 | V8 6.6L | - |
| Pro | Standard Cab Pickup | 2022 - 2025 | V8 6.6L FLEX | - |
| Pro | Standard Cab Pickup | 2022 - 2025 | V8 6.6L DIESEL Turbo | - |
| Pro | Standard Cab Pickup | 2022 - 2025 | V8 6.6L | - |
Applies to every configuration above: RWD | Automatic
Sierra 3500 HD
2020-2025
(tapclick to hide)
Swipe left/right to see more info
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | Cab & Chassis | 2020 - 2021 | V8 6.6L | - |
| Base | Cab & Chassis | 2020 - 2021 | V8 6.6L DIESEL Turbo | - |
| Base | Crew Cab Pickup | 2020 - 2021 | V8 6.6L | - |
| Base | Crew Cab Pickup | 2020 - 2021 | V8 6.6L DIESEL Turbo | - |
| Base | Extended Cab Pickup | 2020 - 2021 | V8 6.6L | - |
| Base | Extended Cab Pickup | 2020 - 2021 | V8 6.6L DIESEL Turbo | - |
| Base | Standard Cab Pickup | 2020 - 2021 | V8 6.6L | - |
| Base | Standard Cab Pickup | 2020 - 2021 | V8 6.6L DIESEL Turbo | - |
| SLE | Cab & Chassis | 2020 - 2025 | V8 6.6L | - |
| SLE | Cab & Chassis | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| SLE | Crew Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| SLE | Crew Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| SLE | Extended Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| SLE | Extended Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| SLE | Standard Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| SLE | Standard Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| SLT | Crew Cab Pickup | 2020 - 2025 | V8 6.6L DIESEL Turbo | - |
| SLT | Crew Cab Pickup | 2020 - 2025 | V8 6.6L | - |
| Base | Cab & Chassis | 2021 | V8 6.6L FLEX | - |
| Base | Crew Cab Pickup | 2021 | V8 6.6L FLEX | - |
| Base | Extended Cab Pickup | 2021 | V8 6.6L FLEX | - |
| Base | Standard Cab Pickup | 2021 | V8 6.6L FLEX | - |
| Pro | Cab & Chassis | 2022 - 2025 | V8 6.6L DIESEL Turbo | - |
| Pro | Cab & Chassis | 2022 - 2025 | V8 6.6L FLEX | - |
| Pro | Cab & Chassis | 2022 - 2025 | V8 6.6L | - |
| Pro | Crew Cab Pickup | 2022 - 2025 | V8 6.6L DIESEL Turbo | - |
| Pro | Crew Cab Pickup | 2022 - 2025 | V8 6.6L FLEX | - |
| Pro | Crew Cab Pickup | 2022 - 2025 | V8 6.6L | - |
| Pro | Extended Cab Pickup | 2022 - 2025 | V8 6.6L FLEX | - |
| Pro | Extended Cab Pickup | 2022 - 2025 | V8 6.6L DIESEL Turbo | - |
| Pro | Extended Cab Pickup | 2022 - 2025 | V8 6.6L | - |
| Pro | Standard Cab Pickup | 2022 - 2025 | V8 6.6L FLEX | - |
| Pro | Standard Cab Pickup | 2022 - 2025 | V8 6.6L DIESEL Turbo | - |
| Pro | Standard Cab Pickup | 2022 - 2025 | V8 6.6L | - |
Applies to every configuration above: RWD | Automatic
Yukon
2021-2025
(tapclick to hide)
Swipe left/right to see more info
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 2021 - 2025 |
Yukon XL
2021-2025
(tapclick to hide)
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| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 2021 - 2025 |
Verify before ordering — please confirm your vehicle's year, make, model and sub-model specifications before placing your order. If anything is unclear, our customer service team is available to help.
Policies, in plain English.
Shipping & Handling
- Standard shipping: 3-7 business days via UPS Ground
- Parts are carefully packaged to prevent damage during transit
6-Month Warranty
All used parts include a 6-month warranty from the date of purchase.
- If your part fails within 6 months, we will send a replacement
- Refunds are only issued if we cannot provide a suitable replacement
- Warranty covers defects — not installation errors, misuse, or damage after installation
Note: Warranty is for replacement, not refund. A part failing on day 80? We'll replace it. But the return window for refunds is 30 days.
Returns (30 Days)
We accept returns within 30 days of delivery for this part.
- Defective parts: We will replace the part or issue a refund at our discretion
- Electronic parts: Must be returned with the sealed inspection bag unopened. The clear bag allows full visual inspection before opening. Once opened, electronic parts can only be exchanged for a replacement if defective — no refunds
- Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
- Return shipping: We cover return shipping as part of our 100% money-back guarantee
- Parts must be returned in original packaging and unmodified condition
- Poorly packaged returns that arrive damaged will not be credited
Damaged in Shipping?
If your part arrives damaged:
- Stop immediately — do not install the part
- Keep all original packaging and boxes
- Take clear photos of the damage and packaging
- Contact us within 48 hours of delivery
We will handle the carrier claim. You are not responsible for shipping damage — we just need your help documenting it.
Order Cancellation
Orders can be cancelled before shipment for a full refund. Once shipped, cancellations follow our return policy.
Expert Guides
Fixing the 'Service Trailer Brake System' Message on 2014-2020 GM Trucks & SUVs
This guide explains the common causes and simple fixes for the 'Service Trailer Brake System' warning on your Silverado, Sierra, Tahoe, Suburban, or Yukon.
Read Full Guide →Related Trouble Codes (OBD-II)
15 matching guidesIf your scan tool is showing one of these trouble codes, this part is a common fix. Each guide explains the code, how to diagnose it, and exactly what to replace.
C1114
Service Trailer Brake System Causes and Fixes
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C1114
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2015-2022 Gmc SIERRA 1500
C1114
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2014-2021 Gmc YUKON XL
C1114
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2023-2025 Chevrolet SILVERADO 1500
C1114
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2022-2025 Gmc YUKON XL
C1114
'Service Trailer Brake' Causes and Fixes
2024-2026 Chevrolet SILVERADO 2500
C1114
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2021-2025 Cadillac ESCALADE
C1114
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2024-2026 Chevrolet SILVERADO EV
C1114
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2024-2026 Gmc SIERRA 2500
C1114
'Service Trailer Brake System' Explained
2023-2025 Gmc YUKON
↑ A single part can trigger multiple related trouble codes. Each guide is vehicle- and code-specific.
Miscellaneous Information
OEM Part Numbers:
GMC: 84488395, 86515222, 87834257
Fits Years: 2019 2020 2021 2022 2023 2024 2025
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Backed For The Long Haul
This part ships with a 6-month warranty. If it doesn't fit or stops working, we replace or refund — no hassle.
What buyers are saying.
★★★★★
4.9
1,451 verified reviews
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