Failing Component: Electrical System: Integrated Trailer Brake Control. The following TSBs of GMC are related to DTC. Oct 20, 2023 · 12) DTC C1114 (Trailer Brake Control Solenoid Valves Control Circuit) may be set and a Service Trailer Brake System message may appear on the Driver Information Center. : 21-NA-054 Date: October, 2022 TECHNICAL Subject: Various Instrument Cluster Functional Concerns or DTC U0155 Set Brand: Model: Model Year: VIN: Engine: Transmission: from to from to Buick Enclave 2022 2023 — — — — LaCrosse (China) 2021 Cadillac CT6 (China) 2023 Chevrolet Blazer 2023 Camaro Malibu Traverse Preliminary Information Bulletin - #PIT5509K - Diagnostic Tip - Check and/or Service Trailer Brake System message DTC C1114 - (May 22, 2023) - For 2018 Chevrolet Silverado - 4WD. If the voltage is higher, the updated calibration will help. The video focuses on the basic Chevrolet specific diagnostic error code. Preliminary Information Bulletin - #PIT4595J - Service Trailer Brake Message With DTC C1114 And/Or C1112 - (May 10, 2021) - For 2013 Chevrolet Avalanche - 2WD. 🔍. GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". Replace the valve body assembly only. The technician will find diagnostic trouble codes C1115, C1116, C1117, or C1118. Diagnostic Information and Procedures - DTC C1112-C1114 or C111B - For 2016 Chevrolet Cheyenne - 4WD. *nj updated 3/28/11. Date: 4/25/2023. 0. Some owners may comment of a Service Trailer Brake System message displayed on the DIC. This bulletin is found in the Cheyenne (LTD), Silverado 1500 (LTD) Service Manual. Mark Nave Service Bulletin Bulletin No. Models: 2016-2020Silverado 1500 Custom. Sep 25, 2017 · Summary: This preliminary information communication provides information to the technician on the steps to diagnose and repair vehicles that may have an intermittent "check trailer wiring" or "service trailer brake" message on the driver information. 2-4. Please contact Dexter or your local GM dealer for further information. This PI is to provide some additional diagnostic information for these three symptoms: – Check Trailer Wiring message – Check Trailer Wiring message with DTC C1114 Oct 5, 2012 · Service trailer brake message with DTC c1114 and/or C1112. If the code is retrievable, dealers should resubmit the transaction making sure to include the code in the SPS Title: #21-NA-155 - Information on Check Trailer Wiring Message and/or Service Trailer Brake Displayed on Driver Information Center (DIC) - DTC C1114 Set - (Jun 14, 2022) Vehicle: 2022 Cadillac Escalade - 4WD The document preview is shown on the right. 1 associated document. Feb 2, 2011 · When checking for DTC's, C1112 or C1114 may be set in the Trailer Brake Control Module (TBCM). This PI is to provide some additional diagnostic information for these three symptoms: – Check Trailer Wiring message – Check Trailer Wiring message with DTC C1114 Jul 22, 2021 · Chevrolet TSB PIT5509C. 4L). More Chevrolet Silverado 5500HD Brake Service Bulletins of Other Model Years. Preliminary Information Bulletin - #PIT5509K - Diagnostic Tip - Check and/or Service Trailer Brake System message DTC C1114 - (May 22, 2023) - For 2022 Chevrolet Silverado 1500 - 2WD New (RPO J22, VIN Digit 5 = A). The Diagnostic Trouble Code (DTC) will be set when the trailer brake power control module detects a short to ground, open, a short to voltage, or a plausibility failure on the trailer brake output circuit. Below are two possible causes for these concerns. The trailer brake controller is a module or device installed in a vehicle to help the driver control the speed and stopping of the trailer. It may also be noticed, while cranking the engine, there is a slow crank. Discuss it at Forum View This TSB Preliminary Information Bulletin - #PIT4595J - Service Trailer Brake Message With DTC C1114 And/Or C1112 - (May 10, 2021) - For 2010 GMC Yukon XL Denali. Home Diagnostic Trouble Code C1112 Chevrolet. Model 2014 silverado 1500, sierra 1500, 2015 sierra, si . Chevrolet, GMC & Cadillac Full-Size SUV Batteries Dying – Liftgates Randomly Opening; Connected Camera. : 21-NA-155 Date: January, 2024 INFORMATION Subject: Information on Check Trailer Wiring Message and/or Service Trailer Brake Displayed on Driver Information Center (DIC) - DTC C1114 Set Brand: Model: Model Year: VIN: Engine: Transmission: from to from to Cadillac Escalade Models 2021 2024 Chevrolet Silverado 1500 The Tech 2 can be used to monitor the "TBCM Relay Feedback Signal" parameter located under Chassis/Trailer Brake Control Module/Data Display to help determine if there is a short to voltage. This procedure is found in the Canyon, Colorado Service Manual. Below is the combinations of message(s)/DTC to determine the type of fault the customer is experiencing: PDF-1. bulletin no. These concerns could be caused by low battery voltage due to a battery issue. May 22, 2023 · PIT5509K. The EBCM sends a serial data message to the IPC requesting this display. Chevrolet DTC C1112 Related Service Bulletins. Subscribe Jun 29, 2020 · PIT5311F GMC Technical Service Bulletin. Chevrolet TSB PIT5509G Make: Chevrolet Number: PIT5509G Title: Diagnostic Tip - Check and/or Service Trailer Brake System message DTC C1114 Date: 7/22/2021 Models: 2015-2020 Colorado; 2015-2021 Colorado LT; 2015-2021 Colorado WT; 2015-2021 Colorado Z71; 2017-2021 Colorado ZR2; 2016-2021 Silverado 1500 Custom; 2019-2021 Silverado 1500 Custom Preliminary Information Bulletin - #PIT4595J - Service Trailer Brake Message With DTC C1114 And/Or C1112 - (May 10, 2021) - For 2010 Chevrolet Suburban - 4WD. The cost to diagnose the C1114 Cadillac code is 1. 2014-2024Silverado 1500. Mar 24, 2020 · PIT5556A GMC Technical Service Bulletin. DTC C1114, C111B, C1595, or C1596. To diagnose the C1114 2018 GMC Sierra code, it typically requires 1. Bulletin No. GM is receiving a number of returned Trailer Brake Control Modules (TBCM) and Trailer Brake Relays that are completely functional. Number: PIT5556A. The following TSBs of Chevrolet are related to DTC C1112. Jul 17, 2023 · What is the Cost to Diagnose the Code C1114 2018 GMC Sierra? Labor: 1. GMC TSB PIT5311F. Nov 14, 2023 · Premature Electrification: Official GM NACS Adapter Isn’t On Sale After All; 2022. 0L. 2014-2024Sierra 1500. This bulletin is found in the Silverado 2500HD/3500HD Service Manual. C1114 GMC Code - Trailer Brake Control Solenoids Control Circuit Malfunction. The purpose of this bulletin is to inform dealership personnel that after performing a brake inspection, brake pad replacement, or any other repair that requires the caliper piston to be re-seated may be causing DTC C05B0 to falsely set for eBoost applications. Some customers may experience an intermittent "Check Trailer Wiring" message and/or a "Service Trailer Brake" message with DTC C1114 on vehicles equipped with ITBC (Integrated Trailer Brake Controller) RPO JL1. Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. It is located in the section: Brakes / Trailer Brake Controls / Diagnostic Information and Procedures. Service Bulletin Bulletin No. If the only DTC set is P187E on vehicles equipped with ETRS GF9, 9TXX transmission assemblies, it may be a park servo magnet concern. More Chevrolet Silverado Integrated Trailer Brake Control Service Bulletins of Other Model Years May 3, 2024 · Owners of the 2024 Chevrolet Silverado EV have reported experiencing a popping or creaking noise while performing certain steering maneuvers. TSB Number: PIT5282D. Diagnosing these concerns can be difficult because the issue could either be related to the truck or the trailer. DIC Message/ DTC's It is important to understand and determine what message is being displayed, as well as, if OTC C1114 is setting. Jul 22, 2021 · Number: PIT5509F. NHTSA Number: 10157010. Some owner may comment of a Service Trailer Brake message on the DIC and the following DTC's set in the Chassis Control Module: C111B, C1112, C1113, and/or C1114. - C1113:02 Trailer Brake Power Control Module Enable Circuit - Short to Ground. . Sep 25, 2017 · Chevrolet TSB PIT5521A. Clean the fuel/water separator reservoir. 2007 GMC Sierra 2500 Electrical Wiring TSB Details …. Technical Service Bulletin 24-NA-045 Released on March 7th, 2024, TSB 24-NA-045 details Diagnostic Information and Procedures - DTC C1114, C111B, C1595, or C1596 - For 2022 GMC Canyon Pickup - 2WD. This bulletin is found in the Avalanche, Escalade, Suburban, Tahoe, Yukon (VIN C/K) Service Manual. Date: 7/22/2021. This will help determine what type of fault to inspect for on the trailer. Detailed repair manual for the 2012 GMC Truck Sierra 2500 Denali 4WD V8-6. PIT5311F. 2014Silverado 1500. Preliminary Information Bulletin - #PIT5509K - Diagnostic Tip - Check and/or Service Trailer Brake System message DTC C1114 - (May 22, 2023) - For 2022 Chevrolet Silverado 1500 - 4WD LTD (RPO J21, VIN Digit 5 = Y). GMC TSB PIT5556A. Diagnostic Information and Procedures - DTC C1112-C1114 or C111B - For 2016 Chevrolet Cheyenne - 2WD. This bulletin is found in the Sierra 1500 (New) Service Manual. This procedure is found in the Cheyenne, Sierra, Silverado Service Manual. Also, on 2021-2022 Terrain models with DTC P187E with a no-crank condition before and Jul 5, 2020 · Tech Notes. Home Diagnostic Trouble Code C1114 GMC. ⚠ Check if your Chevrolet have Safety Recalls. Select the Warranty Claim Code tab. 4 1 0 obj /Title (?PIT5311D Check Trailer Wiring Message and/or Service Trailer Brake With DTC C1114 \(Check Trailer Ground and/or 7-way Connector\)) /Creator Jun 29, 2020 · Number: PIT5311. 2007 GMC Sierra 1500 Brake TSB Details …. Select Settings. This preliminary information communication provides information to Oct 19, 2016 · if the vehicle s 7-way connector socket terminals are deformed or have excessive wear, it will be necessary to replace the truck side connector from general motors customer care and aftersales along with the trailer’s 7-way connector plug. Diagnostic trouble code c1114 set in the chassis Jun 29, 2020 · GMC TSB PIT5311. Read more. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. Date: 5/22/2023. - C1113:01 Trailer Brake Power Control Module Enable Circuit - Short to Battery. GM is receiving a number of returned Trailer Brake Control Modules August 15, 2017. View This TSB. 6L V8 L5P engine. It is located in the section: Body Systems / Trailering Systems / Diagnostic Information and Procedures. This preliminary information communication provides Preliminary Information Bulletin - #PIT5509K - Diagnostic Tip - Check and/or Service Trailer Brake System message DTC C1114 - (May 22, 2023) - For 2022 Chevrolet Silverado 1500 - 2WD LTD (RPO J21, VIN Digit 5 = W). Aug 14, 2020 · Tech Notes. Preliminary Information Bulletin - #PIT5509K - Diagnostic Tip - Check and/or Service Trailer Brake System message DTC C1114 - (May 22, 2023) - For 2021 Chevrolet Silverado 2500 HD/3500 HD - 4WD. C1114 Chevrolet Code - Trailer Brake Control Solenoids Control Circuit Malfunction. Discuss it at Forum View This TSB. Information Bulletin - #21-NA-155 - Information on Check Trailer Wiring Message and/or Service Trailer Brake Displayed on Driver Information Center (DIC) - DTC C1114 Set - (Jun 14, 2022) - For 2022 Chevrolet Silverado 1500 - 4WD LTD (RPO J21, VIN Digit 5 = Y). Diagnostic Information and Procedures - DTC C0870, C1112, C1113, C1114, or C1119 (Gasoline Without LY6) - For 2013 Chevrolet Silverado - 4WD. The VIN, Warranty Claim Code and Date/Time will be listed on a roster of recent programming events. May 10, 2021 · Chevrolet TSB PIT4595J. GMC/chevrolet: on some trucks, message appears in dic regarding symptom of an intermittent service trailer brake and diagnostic trouble codes (DTC) are set in chassis control module. Home Diagnostic Trouble Code C1114 Chevrolet. Preliminary Information Bulletin - #PIT5509K - Diagnostic Tip - Check and/or Service Trailer Brake System message DTC C1114 - (May 22, 2023) - For 2017 Chevrolet Colorado Pickup - 4WD (VIN T). To view the entire document you need to have a subscription. Make: GMC. Below is the combinations of message(s)/DTC to determine the type of fault the customer is experiencing: - Check Trailer Wiring message with no DTC. TSB Number: PIT5241E. Disconnect the chassis side fuel feed hose (3) from the engine side fuel feed pipe (4). C1114 2015 GMC Sierra Code - Trailer Brake Control Solenoids Control Circuit Malfunction Apr 25, 2023 · PIT5509J. This preliminary information communication provides Dec 27, 2021 - This service bulletin provides a service procedure to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated - DTC P3075 Set. Summary: This preliminary information communication provides information to the technician for a service trailer brake message on in the vehicle. They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Jul 22, 2021 · Chevrolet TSB PIT5509E. Title: (Inspect Wiring Harness) Multiple Warning Lights / Messages / High Speed Lan / Chassis Expansion Bus / Intermittent Engine Stall at Stops / Service Power Steering / Service Stabilitrak / Service Park Assist / Service Traction Control Jun 29, 2020 · Chevrolet TSB PIT5311A. Jul 22, 2021 · Number: PIT5509H. This bulletin is found in the Cheyenne (New), Silverado 1500 (New) Service Manual. 2024; 2022; 2021; 2020; 2019; More Brake Service Bulletins of Other 2023 Service Bulletin File in Section: - Bulletin No. This concern may occur with or without a trailer connected to the vehicle. Sep 15, 2023 · This technical bulletin provides a procedure to correct the condition of trailer brake disabled and/or DTC c1114 stored during pulling a trailer with a battery, generator or solar charger. This bulletin is found in the Canyon, Colorado Service Manual. It is common for most auto repair shops to charge between $75 and $150 per hour. Models: 2015-2024Canyon. We would like to show you a description here but the site won’t allow us. 2007 Chevrolet Silverado Integrated Trailer Brake Control TSB Details …. - C0561 72 System Disabled Information Stored Alive Counter Incorrect. Jul 17, 2023 · To diagnose the C1114 2016 Chevrolet Silverado code, it typically requires 1. Some customers may comment that when they have a trailer connected to the vehicle, they get a "Check Trailer Wiring" or "Service Trailer Brake System" message on the DIC. Review Strategy Based Diagnosis for an overview of the diagnostic approach. : PIT5311 B Date: Jun-2016 What is the Cost to Diagnose the Code C1114 Cadillac? Labor: 1. Title: Check Trailer Wiring Message and/or Service Trailer Brake with DTC C1114 (Check Trailer Ground and/or 7-way Connector) Jul 17, 2023 · What is the Cost to Diagnose the Code C1114 2014 Chevrolet Silverado? Labor: 1. Jul 22, 2021 · GMC TSB PIT5509F. : 22-NA-247. - C0561 71 System Disabled Information Stored Invalid Serial Data Received. - C0561 74 System Disabled Information Value of Signal Protection Calculation Incorrect. Exclusive: 2025 Buick Enclave to Feature Standard Connected Camera System; 2023/2024 Chevrolet Silverado Police Pursuit Equipped with Wrong Tires; More News Jul 17, 2023 · To diagnose the C1114 Chevrolet code, it typically requires 1. DTC C1114 could be set in the Chassis Control Module/Chassis Control Module Auxiliary/Brake System Control Module. 1:48 Insight int Aug 17, 2017 · The message center displays the service traction control system message when any one of many traction control - disabling DTCs is set. DTC C0870, C1112, C1113, C1114, or C1119 (Gasoline With LY6, or Diesel) Information Bulletin - #21-NA-155 - Information on Check Trailer Wiring Message and/or Service Trailer Brake Displayed on Driver Information Center (DIC) - DTC C1114 Set - (Jun 14, 2022) - For 2022 GMC Sierra 1500 - 4WD New (RPO J22, VIN Digit 5 = U). Fig. GM is receiving a number of returned Trailer Brake Control Jul 17, 2023 · To diagnose the C1114 2017 GMC Sierra code, it typically requires 1. 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. 2015-2024Silverado 2500. C1114 2014 Chevrolet Silverado Code - Trailer Brake Control Solenoids Control Circuit Malfunction Diagnostic Information and Procedures - DTC C1112-C1114 or C111B - For 2014 Chevrolet Cheyenne - 2WD. Check Trailer Wiring Message and/or Service Trailer Brake With DTC C1114 2014 Chevrolet Silverado 1500 2015-2016 Chevrolet Silverado, Suburban, Tahoe 2014 GMC Sierra 1500 2015-2016 GMC Sierra, Yukon Models This Pl was superseded to update Model Years. The following TSBs of GMC are related to DTC C1114. 2007 GMC Sierra 1500 Integrated Trailer Brake Control TSB Details …. ABS Description and Operation (With JL4) This vehicle is equipped with a Bosch ABS/EBD/TCS/VSES brake system. Manufacturer technical service bulletins received by the National Highway Traffic Safety Administration to date. Jul 17, 2023 · The Diagnostic Trouble Code (DTC) will be set when the trailer brake power control module detects a short to ground, open, a short to voltage, or a plausibility failure on the trailer brake output circuit. Most systems have a plus/minus adjustment gain, and Jul 17, 2023 · The Diagnostic Trouble Code (DTC) will be set when the trailer brake power control module detects a short to ground, open, a short to voltage, or a plausibility failure on the trailer brake output circuit. Most auto repair shops charge between $75 and $150 per hour. Diagnosing these concerns can be difficult GMC DTC C1114 Related Service Bulletins. Title: #21-NA-155 - Information on Check Trailer Wiring Message and/or Service Trailer Brake Displayed on Driver Information Center (DIC) - DTC C1114 Set - (Jun 14, 2022) Vehicle: 2022 GMC Yukon XL - 2WD The document preview is shown on the right. Important ECM update for 6. This procedure is found in the Cheyenne, Sierra, Silverado (VIN C/K) Service Manual. Diagnostic Information and Procedures - DTC C1112-C1114 or C111B - For 2014 Chevrolet Cheyenne - 4WD. service bulletin document. *pe . Technician may find diagnostic trouble codes c1112, c1113, c1114, c111b, u1556, and/or u1505. This procedure is found in the Cheyenne, Sierra, Silverado 1500 Service Manual. Diagnostic trouble code c1114 set in the May 10, 2021 · GMC TSB PIT4595J. To diagnose the C1114 2014 Chevrolet Silverado code, it typically requires 1. 12 The trailer brakes may be disabled if the customer’s trailer has a solar panel battery charger or generator. DTC C1114 could be set in the Chassis Control Module (CCM)/Brake System Control Module (BSCM). With rpo jl1. The brand has recently released a Technical Service Bulletin (TSB) going over the sounds and why they are happening. communication number: pit4595, date: 2010-06-01 category: 118500 electrical system: integrated trailer brake control summary: service trailer brake message with dtc c1114 and/or c1112. . 2007 Chevrolet Silverado Electrical Wiring TSB Details …. Number: PIT5311F. Sep 25, 2017 · This preliminary information communicates a diagnostic tip for a service trailer brake message with DTC c111b C1112 C1113 c1114 advising to address any battery issues first before any in depth diagnostics are done. This preliminary information communication provides information to the technician about vehicles that have trailer connection not recognized or "check trailer wiring" or "service trailer brake" message. Diagnostic Instructions. This bulletin is found in the Cheyenne, Sierra, Silverado Service Manual. with rpo jl1. Diagnostic trouble code c1114 set in the Jul 22, 2021 · GMC TSB PIT5509. Date: 6/29/2020. The following TSBs of Chevrolet are related to DTC C1114. Mark Nave Apr 25, 2023 · It is important to understand and determine what message is being displayed, as well as, if DTC C1114 is setting. When checking for DTC's, C1112 or C1114 may be set in the Trailer Brake Control Module (TBCM). It is mounted on the driver’s side dashboard and activates in proportion to the vehicle’s brake or at a time-delayed frequency when reducing speed. Models: 2015-2021Colorado. Call the Vehicle Safety Hotline toll free at (888) 327-4236 to report safety defects or to obtain information on cars, trucks, child restraints, highway or traffic safety. Title: Check Trailer Wiring Message and/or Service Trailer Brake With DTC C1114. : 15-06-01-002L Date: April, 2022 TECHNICAL Subject: Engine Misfire/Tick Noise, Malfunction Indicator Lamp (MIL) Illuminated - DTC P0300 Set Models: 2015-2020 Cadillac Escalade 2016-2019 Cadillac CTS-V 2014 Chevrolet Silverado 1500 2014-2019 Chevrolet Corvette 2015-2018 Chevrolet Silverado 2015-2020 Chevrolet Jun 2, 2024 · GM Releases Fix For 2024 Chevy Silverado HD Duramax Selective Catalyst Reduction Fault. Revised March 28, 2019– Added 2019 Model Year and DTC P0499 to Condition. 350000 EQUIPMENT: Dec 27, 2021 - This service bulletin provides information for dealers/technicians and customers on steam/vapor coming from the front grille or radiator area. Service manuals, electrical schematics and bulletins for 1995 to current GM vehicles. Contents:0:21 Basic DTC analysis according to OBD2 protocol standard. Place the end of the chassis side fuel feed hose into a clean container and run the fuel pump to clean any debris left in the fuel lines, approximately 2-3 gallons (7. Sep 25, 2017 · Models. Models: 2015-2023Colorado. 1 volts. C1112. Condition/Concern Bulletin No. 2022Sierra 1500 Limited. 2020 Chevrolet Silverado 2500 HD/3500 HD - 4WD | Silverado 2500HD/3500HD Service Manual (13188072) | Document ID: 4712346. Reprogram the TBCM with the latest cals Jul 17, 2023 · The Diagnostic Trouble Code (DTC) will be set when the trailer brake power control module detects a short to ground, open, a short to voltage, or a plausibility failure on the trailer brake output circuit. 2019-2020Silverado 1500 Custom Trail Boss. The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. 2007 GMC Sierra 1500 Electrical Wiring TSB Details …. Subscribe Preliminary Information Bulletin - #PIT4595J - Service Trailer Brake Message With DTC C1114 And/Or C1112 - (May 10, 2021) - For 2011 Chevrolet Tahoe - 4WD. 0 hour of labor. summary: service trailer brake message with dtc c1114 and/or c1112. Technical Service Bulletins for the 2021 GMC ACADIA. The solenoid body has no effect on this DTC. PIT5556A. : pit5311 b date: jun-2016 Chevrolet DTC C1114 Related Service Bulletins. The normal voltage reading is between 3. Jul 22, 2021 · Chevrolet TSB PIT5509A. Mar 14, 2017 · Some customers may comment that when they have a trailer connected to the vehicle, they get a "Check Trailer Wiring" or "Service Trailer Brake System" message on the DIC. Select and start SPS2. Please discard PIT5311A. 6-11. Dec 21, 2017 · Chevrolet TSB PIT5529A. Subject: Service Trailer Brake Message With DTC's C1112 C1113 C1114 C111B U1556 and/or U1505 Brand: Model: Model Year: VIN: Engine: Transmission:Brand: Model: from to from to Engine: Transmission: Chevrolet Silverado 1500 2014 2014 All All All All Chevrolet Silverado 2015 2017 All All All All GMC Sierra 1500 2014 2014 All All All All Open TLC on the computer used to program the vehicle. 2007 GMC Sierra 1500 Electrical System TSB Details …. : PIT5311 Date: August, 2014 PRELIMINARY INFORMATION Subject: Check Trailer Wiring Message and/or Service Trailer Brake With DTC C1114 Models: 2014 Chevrolet Silverado 1500 2015 Chevrolet Silverado, Suburban, Tahoe 2014 GMC Sierra 1500 2015 GMC Sierra, Yukon Models Although GM service bulletin DTC C1114 identifies Dexter Actuator serial numbers with prefixes TCV, TCB and CBH; Dexter recommends reviewing all Electric/Hydraulic actuators for proper function prior to towing, regardless of the serial number, make or model. TSB Date: September 15, 2017. DTC C1114 could be set in the Chassis Control Module (CCM). 2014-2021Silverado 1500. Title: Diagnostic Tip - Check and/or Service Trailer Brake System message DTC C1114. Although GM service bulletin DTC C1114 identifies Dexter Actuator serial numbers with prefixes TCV, TCB and CBH; Dexter recommends reviewing all Electric/Hydraulic actuators for proper function prior to towing, regardless of the serial number, make or model. ps ur zi ai jz mx aq al ih df