NHTSA service bulletin

NHTSA Service Bulletin 10201177: 2014-2022 Cadillac Canyon

Official manufacturer communication context for 2014-2022 Cadillac Canyon, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.

NHTSA service bulletin 10201177 summary graphic for 2014-2022 Cadillac Canyon
10201177NHTSA document ID
Manufacturer communicationcommunication type
13affected product rows
100/100quality score

Reviewed June 2026 from NHTSA manufacturer communication and service bulletin records. Carchieve is independent and not affiliated with any vehicle manufacturer or government agency.

Quick answer

This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicle that may have a "Check Trailer Wiring" or "Service Trailer Brake System? message on the Driver Information Center when a trailer is connected to the vehicle. Diagnostic Trouble Code C1114 set in the Chassis Control Module. Chassis Control Module has to determine the type of trailer brake system that is being used. The Chassis Control Module can be sensitive to a variety of trailer wiring issues. The technician will need to make a trailer tester using Electric Trailer Brake Magnets and 7-way trailer connector to determine if it is a vehicle or trailer issue. If the concern is not duplicated with the tester installed, the vehicle is operating correctly and the focus should be on the trailer wiring or 7 way connector.

What this bulletin may mean before buying

Treat this as service research, not a verdict on one car. Before you buy, compare this communication with official recall campaigns, model-level owner complaint patterns, and the exact vehicle’s VIN-decoded specifications. A bulletin can help you ask a seller or dealer sharper questions about software updates, known repairs, warranty extensions and service history.

Affected products listed in this communication

MakeModelModel yearsBuyer note
CadillacEscalade Esv2021, 2022Ask for service records and run the exact VIN before purchase.
ChevroletColorado2015-2022Ask for service records and run the exact VIN before purchase.
ChevroletSilverado 25002015-2022Ask for service records and run the exact VIN before purchase.
ChevroletSilverado 35002015-2022Ask for service records and run the exact VIN before purchase.
ChevroletSuburban2015-2022Ask for service records and run the exact VIN before purchase.
GMCCanyon2015-2022Ask for service records and run the exact VIN before purchase.
GMCSierra 25002014-2022Ask for service records and run the exact VIN before purchase.
GMCSierra 35002014-2022Ask for service records and run the exact VIN before purchase.
GMCYukon Denali2015-2019Ask for service records and run the exact VIN before purchase.
GMCYukon Xl2020-2022Ask for service records and run the exact VIN before purchase.

Buyer checklist

  1. Run the 17-character VIN and confirm the year, make, model, engine and equipment match the listing.
  2. Check recall campaign pages for safety actions that may require dealer repair.
  3. Compare this bulletin with common problem pages for the same model and component area.
  4. Ask the seller or dealer whether the bulletin procedure, update or inspection has already been completed.
  5. Use the used-car buying checklist and get an independent inspection.

Frequently asked questions

What is NHTSA service bulletin 10201177?

This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicle that may have a "Check Trailer Wiring" or "Service Trailer Brake System? message on the Driver Information Center when a trailer is connected to the vehicle. Diagnostic Trouble Code C1114 set in the Chassis Control Module. Chassis Control Module has to determine the type of trailer brake system.

Is a service bulletin the same as a recall?

No. A recall is a safety campaign with a required remedy for affected VINs. A service bulletin or manufacturer communication usually describes diagnostic, repair, software, warranty or service information.

How should a used-car buyer use this bulletin?

Use it as a research signal. Compare it with recalls, owner complaints, service records, a VIN report and an independent inspection before buying.

Check the exact VIN before you buy

Model-level pages show public safety patterns. A full VIN report helps confirm the exact vehicle, decoded specs, recall applicability and buyer checks.

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