2015 GMC Sierra 1500
Problems, recalls and owner-reported issues
Service brakes is the leading concern among 817 owner complaints filed for this model year. This is the 2nd highest complaint count among 26 Sierra 1500 model years with reports.
Of the 2015 reports, 29 involved a crash and 10 involved a fire. 14 people were injured.
What owners report most often
Recalls and investigations
Air bags, side/window, curtain, inflatorJul 1, 2021
General Motors LLC (GM) is recalling certain 2015-2016 GMC Sierra 1500, 2500, 3500, and Chevrolet Silverado 1500, 2500, and 3500 trucks. The roof-rail air bag (RRAB) inflator end cap may detach from the inflator, or the inflator sidewall may rupture.
A separated inflator end cap or inflator rupture can allow compressed gas to escape, resulting in the end cap or other components being propelled into the vehicle, increasing the risk of injury or crash.
Dealers will replace the left and right side RRAB modules, free of charge. Interim owner notification letters informing owners of the safety risk were mailed on August 18, 2021. Owners will receive a second notice when the remedy is available. Phase I owner notification letters were mailed on May 5, 2022. Phase II owner notification letters are expected to be mailed on May 31, 2022. Owners may contact GMC customer service at 1-888-988-7267 or Chevrolet customer service at 1-800-222-1020. This recall supersedes NHTSA recall number 20V-736. GM's number for this recall is N202324251.
Campaign 21V504000 on NHTSA.gov
Seat belts, frontApr 8, 2021
General Motors, LLC (GM) is recalling certain 2014-2016 Chevrolet Silverado 1500, 2015-2016 Chevrolet Tahoe, and 2014-2015 GMC Sierra 1500 vehicles that may have received an incorrect replacement tensioner cable assembly as part of a previous recall remedy or a subsequent repair. The flexible steel cable connecting the driver's seat belt to the outboard side of the seat may be repeatedly bent over the seat side shield as the driver enters and exits the vehicle causing the cable to fatigue and separate.
A broken pretensioner cable reduces the effectiveness of the driver's seat belt, increasing the risk of injury.
GM will notify owners, and dealers will replace the driver seat belt lap pretensioner, free of charge. The recall began on May 5, 2021. Owners may contact Chevrolet customer service at 1-800-222-1020, and GMC customer service at 1-800-462-8782. GM's number for this recall is N212330040.
Campaign 21V245000 on NHTSA.gov
Air bags, side/window, curtain, inflatorNov 25, 2020
General Motors LLC (GM) is recalling certain 2015-2016 GMC Sierra 1500 and Chevrolet Silverado 1500 and 2015 GMC Sierra 2500 and 3500, and Chevrolet Silverado 2500 and 3500 trucks. The roof-rail air bag (RRAB) inflator end cap may detach from the inflator.
If the end cap separates from the inflator, the compressed gas will escape and the end cap can be propelled into the vehicle, increasing the risk of injury or a crash.
GM will notify owners, and dealers will replace the RRAB modules on the left and/or right side, free of charge. Interim owner notification letters were mailed on December 22, 2020. Owners may contact GMC customer service at 1-888-988-7267 or Chevrolet customer service at 1-800-222-1020. Note: GM filed a new recall, number 21V-504 that supersedes this recall. All vehicles previously recalled under 20V-736 will now be repaired under the new recall number 21V-504. GM's numbers for this recall are N202309680, N202309681, and N202309682.
Campaign 20V736000 on NHTSA.gov
Service brakes, hydraulic, antilock/traction control/electronic limited slip, wheel speed sensor/tone ringOct 24, 2019
General Motors LLC (GM) is recalling certain 2015-2020 Chevrolet Suburban, Tahoe, and GMC Yukon, and 2014-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles equipped with a 5.3-liter engine, a 3.08-ratio rear axle and four-wheel drive. If a wheel-speed sensor fails, while the vehicle is traveling between 41 and 60 mph in four-wheel or automatic mode, the Electronic-Brake Control Module (EBCM) software may activate the driveline-protection system.
Unintended activation of the driveline-protection system will cause unintended braking on the wheel on the opposite side of the failed sensor, causing the vehicle to pull to one side unexpectedly, increasing the risk of a crash.
GM will notify owners, and dealers will reprogram the EBCM, free of charge. The recall began December 11, 2019. Owners may contact Chevrolet customer service at 1-800-630-2438 or GMC customer service at 1-800-462-8782. GM's number for this recall is N192261050.
Campaign 19V761000 on NHTSA.gov
Service brakes, hydraulic, power assist, vacuumSep 6, 2019
General Motors LLC (GM) is recalling certain 2015-2017 Cadillac Escalade, 2014-2018 Chevrolet Silverado, GMC Sierra, 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles. The amount of vacuum created by the vacuum pump may decrease over time.
As the vacuum level drops, the brake assist decreases, increasing braking effort, extending the distance required to stop the vehicle, thereby increasing the risk of a crash.
GM will notify owners, and dealers will reprogram the Electronic Brake Control Module, free of charge. The recall began October 8, 2019. Owners may contact Chevrolet customer service at 1-800-630-2438, Cadillac customer service at 1-800-458-8006 or GMC customer service at 1-800-462-8782. GM's number for this recall is N192268490.
Campaign 19V645000 on NHTSA.gov
Steering, electric power assist systemSep 7, 2018
General Motors LLC (GM) is recalling certain 2015 Chevrolet Silverado 1500, Tahoe and Suburban, GMC Sierra 1500 and Yukon, and Cadillac Escalade vehicles. Electric power steering (EPS) assist may be lost momentarily, followed by a sudden return of EPS assist.
If EPS assist is lost and then suddenly returns, the driver may have difficulty steering the vehicle, especially at low speeds, increasing the risk of a crash.
GM will notify owners, and dealers will update the EPS module software, free of charge. The recall began October 12, 2018. Owners may contact Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020 and GMC customer service at 1-800-462-8782. GM's number for this recall is 18289.
Campaign 18V586000 on NHTSA.gov
Air bags, frontalJul 10, 2017
General Motors LLC (GM) is recalling certain model year 2014-2016 Buick Lacrosse and Chevrolet Spark EV, Caprice PPV and SS vehicles, 2014-2017 Buick Encore and Chevrolet Corvette, Silverado 1500 and GMC Sierra 1500 vehicles, 2015-2016 Cadillac Escalade and Escalade ESV, Chevrolet Tahoe, Trax, Suburban and Silverado 2500 and 3500 and GMC Yukon and Yukon XL vehicles, and 2015-2017 GMC Sierra HD 2500 and 3500 vehicles. While being previously remedied for recall 16V-651, the affected vehicles may not have received the complete software update necessary to remedy the recall condition. Without the update, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.
A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge. The recall began on August 4, 2017. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 17287.
Campaign 17V437000 on NHTSA.gov
Air bags, frontalSep 8, 2016
General Motors LLC (GM) is recalling certain model year 2015-2017 Chevrolet Silverado 2500 HD, 3500 HD, Tahoe, Suburban, GMC Sierra 2500 HD and 3500 HD, GMC Yukon, GMC Yukon XL, Cadillac Escalade and Cadillac Escalade ESV vehicles and 2014-2017 Chevrolet Corvette, Silverado 1500, Trax, Caprice Police Pursuit Vehicle, GMC Sierra 1500, Buick Encore, and 2014-2016 Buick Lacrosse, Chevrolet Spark EV and SS vehicles. In the affected vehicles, certain driving conditions may cause the air bag sensing and diagnostic module (SDM) software to activate a diagnostic test. During this test, deployment of the frontal air bags and the seat belt pretensioners would not occur in the event of a crash.
A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
GM will notify owners, and dealers will reflash the SDM software. Vehicles that have had a previous air bag deployment will have the SDM replaced. These repairs will be performed free of charge. The recall began on October 13, 2016. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 16007.
Campaign 16V651000 on NHTSA.gov
Seat beltsApr 12, 2016
General Motors LLC (GM) is recalling certain model year 2014-2015 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks manufactured January 29, 2013, to January 21, 2015. While entering the vehicle, the seat belt tensioner cable may be positioned such that the driver slides over it. This movement may result in the fatigue and separation of the cable.
If the tensioner cable separates, the driver may not be properly restrained in the event of a crash, increasing their risk of injury.
GM will notify owners, and dealers will modify the vehicles to prevent the tensioner from being damaged. Any tensioner that has already been damaged will be replaced, free of charge. The recall began on August 11, 2016. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GM's number for this recall is 15822.
Campaign 16V209000 on NHTSA.gov
Representative owner complaints
817 reports, newest first.
Service brakes, Jul 3, 2019
BRAKE PEDAL STIFF/HARD WHEN APPLYING BREAKS. PROBLEM OCCURS PERIODICALLY WITHIN THE CITY AND HIGHWAY.
Steering, Service brakes, Engine, Jul 2, 2019
I ONLY HAVE 57,000 MILES ON MY TRUCK, WHICH IS WHY I AM REPORTING THIS. THE TRUCK TURNS OFF COMPLETELY. I HAVE BEEN GOING TO MAKE A RIGHT/LEFT TURN AND THE TRUCK SHUTS DOWN COMPLETELY. I HAVE NO POWER STEERING AND LIMITED BRAKES. THIS HAS HAPPENED TO ME TWICE NOW. I AM LUCKY ENOUGH THAT I AM STRONG ENOUGH TO TURN THE TRUCK WITHOUT POWER STEERING OTHERWISE I WOULD HAVE HIT VEHICLES BOTH TIMES THIS HAPPENED. THERE HAS TO BE SOME TYPE OF ELECTRICAL FLAW THAT IS MAKING THIS HAPPEN. I WANT TO GET THIS RESOLVED BEFORE MY INSURANCE COMPANY HAS TO GET INVOLVED BECAUSE I AM IN A CAR ACCIDENT. IF THIS IS SOMETHING THE MANUFACTURER TAKES CARE OF THAT WOULD BE GREAT, OTHERWISE I WOULD JUST LIKE TO KNOW IF SOMEONE ELSE HAS HAD THIS ISSUE AND HAS FOUND THE RESOLUTION.
Service brakes, Jul 2, 2019
WHEN THE TRUCK'S VACUUM PUMP FAILS, THE BRAKE PEDAL BECOMES VERY HARD TO PUSH. THE TRUCK DOES NOT STOP AT LOW SPEED WHEN THIS HAPPENS. THE FIRST TIME THIS HAPPENED, I WAS BACKING INTO A PARKING SPACE AT CHRISTMAS TREE STAND. I NEARLY BACKED INTO THE TENT AND PERSONS LOADING THE CHRISTMAS TREE IN THE TRUCK. THE SECOND TIME THIS HAPPENED, I WAS PARKING MY TRUCK IN DRIVEWAY. I ROLLED ABOUT 6' TO 8' BEFORE STOPPING. I NEARLY HIT MY HOUSE. GM ISSUES A "SPECIAL WARRANTY" BUT THEY REFUSE TO COVER THE REPAIRS BECAUSE OF THE VEHICLE MILEAGE. THIS SAME ISSUE IS WELL DOCUMENTED BY OTHER GM TRUCK OWNERS FOR 2014 TO 2018 MODEL YEARS.
Service brakes, Jul 2, 2019, crash
BRAKES DO NOT WORK WHEN IN REVERSE OR AT LOW SPEEDS. PROBLEM WAS THERE THE DAY I PURCHASED THE VEHICLE. A COUPLE WEEKS AFTER PURCHASE I BACKED INTO VEHICLE IN A PARKING LOT. I WAS TOLD IT WAS "NORMAL" AFTER ALMOST HAVING A WRECK I DID SOME RESEARCH. HOW IS THIS NOT NATIONALLY ADVERTISED AS A RECALL YET? THIS IS A HUGE SAFETY NEGLIGENCE ON GMC'S PART. THE VACUUM PUMP IS KNOWN TO FAIL BY EVERY DEALER I HAVE CALLED. ALSO EVERYONE I KNOW WHO HAS THE SAME MODEL TRUCK ALSO LIVES WITH THIS PROBLEM.
Power train, Jun 30, 2019
WHEN PUTTING THE TRUCK INTO GEAR WITH THE FOOT FIRMLY ON THE BRAKES THE TRUCK WILL SLAM INTO GEAR CAUSING THE TRUCK TO JUMP FORWARDS OR BACKWARDS.
Service brakes, Jun 30, 2019
WHEN COMING TO A STOP THE BRAKE PEDAL GETS HARD TO DEPRESS AND THE RATE OF DECELERATION CHAGES MAKES IT HARD TO JUSGE WHEN AND WHERE THE VEHICLE WILL END UP.
Service brakes, Jun 28, 2019, crash
WHILE IN A DRIVE THROUGH I WAS CREEPING UP AND WHEN TRYING TO COME TO A STOP MY BRAKE PEDAL WOULD NOT DEPRESS ALL THE WAY AS NORMAL AND TOOK A LONGER THAN NORMAL TIME TO STOP EVEN WITH BOTH FEET PUSHING ON THE BRAKE PEDAL. I ENDED UP ROLLING INTO THE CAR IN FRONT OF ME. I TOOK THE CAR TO THE DEALERSHIP THE NEXT DAY AND WAS TOLD THAT MY VACUUM PUMP/BRAKE BOOSTER NEEDED TO BE REPLACED.
Steering, Electrical system, Electronic stability control (ESC), Jun 27, 2019
INTERMITTENTLY LOSING POWER STEERING. STABILITY TRACK LIGHT COMES ON FOR NO APPARENT REASON, HEADLIGHTS DIM WHEN APPLYING BRAKES.
Service brakes, Jun 25, 2019
WHEN YOU STEP ON THE BRAKES IN MOTION THE BRAKE PEDAL IS HARD AND VEHICLE TAKES LONGER TO STOP.
Service brakes, Jun 23, 2019
THE BRAKES PERIODICALLY DO NOT WORK AT LOW SPEEDS. THE BRAKE PEDAL GETS HARD TO PUSH TO THE POINT YOU HAVE TO STAND ON THE BRAKES TO GET THE VEHICLE TO STOP. I HAVEN'T GOTTEN IN AN ACCIDENT YET BUT IT'S BEEN VERY CLOSE TWICE NOW WHERE I'VE ALMOST HIT A CAR IN FRONT OF ME AT A STOP SIGN.
Other or unspecified, Service brakes, Jun 19, 2019
HARD BRAKE PEDAL AT LOW SPEEDS ESPECIALLY WHILE TOWING OR TRAVELING ON INCLINES. BRAKE PEDAL BECOMES HARD TO DECOMPRESS WITHOUT WARNING AND VEHICLE IS UNABLE TO BE STOPPED.
Other or unspecified, Jun 18, 2019
A/C CONDENSER BAD. FREON LEAK.
Power train, Other or unspecified, Jun 15, 2019
WHEN I'M CRUISING HIGHWAY SPEEDS THE TRUCK GET A VIOLENT VIBRATION AND MAKES THE VEHICLE UNCOMFORTABLE TO DRIVE.
Service brakes, Jun 12, 2019
MY 2015 GMC SIERRA FAILED TO STOP AT LOW SPEEDS TODAY. I AVOIDED THE COLLISION BY PULLING OFF THE SIDE OF THE ROAD. THE PEDDLE WAS EXTREMELY HARD TO PUSH. I RECEIVED A NOTICE BY GMC THAT ITS THE VACCUM PUMP AND THEY WILL ONLY COVER THE WARRANTY UP TO 72K MILES. MY TRUCK HAS 72,560 MILES.
Other or unspecified, Jun 10, 2019
I HAVE A 2015 GMC SIERRA WITH 95,198 MILES ON IT. THE AC STARTED BLOWING HOT AIR WHEN I WAS DRIVING TO WORK. I PURCHASED AND INSTALLED AN AC REFILL KIT, WHICH ONLY LASTED A COUPLE OF HOURS. I TOOK MY TRUCK TO THE LOCAL GM DEALERSHIP TO DIAGNOSE PROBLEM. DEALERSHIP CALLED TO TELL ME THAT IT WOULD BE $800+ TO REPLACE AC CONDENSER. UPON FURTHER INVESTIGATION I DISCOVERED THAT FAULTY AC CONDENSERS, AND COMPRESSORS ARE VERY COMMON PROBLEMS IN CERTAIN GMC, CHEVY, AND CADILLAC VEHICLES. WHY ARE CONSUMERS STUCK PAYING OUT OF POCKET FOR KNOWN DEFECTS THAT ARE IN EXCESS OF $800?
Other or unspecified, Jun 10, 2019
THE A/C WENT OUT. HAVE 36000 MILES THIS SHOULDN'T BE MESSING UP.
Other or unspecified, Jun 5, 2019
THE AIR CONDITIONING STARTED BLOWING HOT AIR WHILE MOVING. THE TRUCK IS ONLY 4 YEARS OLD WITH 75000 MILES ON IT. IN DOING RESEARCH WE HAVE LEARNED THAT THIS IS A COMMON PROBLEM WITH THE GMC SIERRA'S AND IT NOT COVERED BY GM EVEN THOUGH IT APPEARS TO BE A DESIGN FLAW.
Structure, Jun 5, 2019
2015 GMC SIERRA PAINT IS BLISTERING AND PEELING IN THE TRUCK BED. CONTACTED GMC THRU THEIR APP AND THE SAID TO TAKE TO THE DEALERSHIP BODY SHOP. THEY TOOK PICTURES AND SAID IT LOOKS LIKE THE PAINT WASN'T STICKING TO THE PRIMER. GMC SAID THE TRUCK WAS OUT OF WARRANTY. I COULD HAVE SOMEONE REPAINT IT AT MY OWN EXPENSE.
Structure, Jun 5, 2019
2015 GMC SIERRA PAINT IS BLISTERING AND PEELING IN TRUCK BED. NEVER HAULED ANYTHING IN IT. GMC DEALERSHIP'S BODY SHOP SAID FACTORY PAINT DIDN'T STICK TO THE PRIMER. COMING OFF IN BIG PIECES. HAD TRUCK FOR 3 1/2 YEARS. CALLED GMC AND GMC SAID OUT OF WARRANTY.
Electrical system, Structure, Jun 4, 2019
ON SEVERAL OCCASIONS ALL SOUNDS FROM DOOR CHIME, RADIO, ONSTAR, ETC. HAVE FAILED. FURTHER THE PAINT IS BEGINNING TO BLISTER FROM UNDERNEATH. GM IS DENYING BOTH PROBLEMS EXIST. GM SAYS THE PAINT ISSUE IS DUE TO APPLICATION OF AN EXTREME HEAT SOURCE. ARIZONA IS HOT, BUT NOT THAT HOT. THE SOUND ISSUE IS A SAFETY HAZARD. THE PAINT ISSUE IS TYPICAL CORPORATE DENIAL OF LEGITIMATE CLAIMS.
Other or unspecified, Jun 3, 2019
LIKE SO MANY OTHERS, MY TRUCK IS NOT VERY OLD AND HAS BEEN BLOWING HOT AIR FOR MONTHS. IT APPEARS TO BE THE SAME CONDENSER ISSUE AS REPORTED BY HUNDREDS IF NOT THOUSANDS MORE. AFTER DISCOVERING THIS IS CHRONIC ISSUE AND AC DELCO * DISCONTINUED THE ORIGINAL CONDENSER * ISSUED TSBS FOR THE CONDENSER WHICH INCLUDE A BRACKET TO HELP PREVENT THE ISSUE (TSB PIT5331 / OCT 2014) (TSB PIE0340 / MAY 2015) NEITHER OF THESE WERE EITHER APPLIED TO MY VEHICLE OR WERE NOT EFFECTIVE IN PREVENTING THE ISSUE. IT SEEMS OBVIOUS THAT THIS IS A DEFECT IN MATERIALS AND WORKMANSHIP BASED ON THEIR ISSUING OF THESE TSBS AND FAILURE TO RECALL THESE VEHICLES UNDER WARRANTY. THEY'VE APPARENTLY OPERATED A BLATANT "LET'S WAIT AND SEE" CAMPAIGN, HOPING THOSE OF US THAT DIDN'T CATCH THIS UNDER WARRANTY WILL FALL OUT OF WARRANTY AS I HAVE. SEVERAL LAW FIRMS HAVE INITIATED CLASS ACTION SUITS AGAINST GM IN REGARDS TO THIS, BUT IT SEEMS LIKE THAT'S A GOOD CHANCE TO GET LAWYERS RICH AND NOT GET MY TRUCK FIXED, OR GET A CHECK FOR $9.99... AS A SUMMARY - MY TRUCK BEGAN BLOWING WARM AIR LAST FALL, BUT I DIDN'T RECOGNIZE IT AS AN ISSUE AS THE WEATHER WAS ALSO TURNING COOL AND I WASN'T USING THE A/C. AC/DELCO AND GENERAL MOTORS KNOWS THIS IS CHRONIC AND AVOIDABLE ISSUE THE FAULTY PARTS HAVE BEEN REPLACED WHEN THE PRODUCTS FAIL UNDER WARRANTY NO EFFORT HAS BEEN MADE TO REPLACE THE KNOWINGLY FAULTY PARTS.
Other or unspecified, Jun 3, 2019
AIR CONDITIONER BLOWS HOT AIR AS A RESULT OF LINE SYSTEM LEAK. AIR CONDITIONING FAILURE DO TO KNOWN TSB PIT5331. GMC HAS COVERED THIS ISSUE FOR LIKE SUV MODELS (ESCALADE, TAHOE, YUKON), BUT WANTS OVER $1,000 TO REPAIR GMC SIERRA 1500 AT GMC DEALERSHIP. THIS IS A FAULTY PRODUCT DESIGN THAT IS A KNOWN PROBLEM PER THEIR OWN SERVICE BULLETIN, AND ASSOCIATED HARNESS TO ENFORCE FAULTY AIR CONDITIONER UNIT DESIGN.
Other or unspecified, Jun 3, 2019
2015 GMC SIERRA 1500 AIR CONDITIONING HAS STOPPED WORKING. THIS APPEARS TO BE A VERY COMMON PROBLEM AND GMC HAS ONLY ISSUED SPOTTY RECALLS FOR IT. MY TRUCK HAS 46,000 MILES AND NOW MY CHILDREN GET TO RIDE IN A HOT VEHICLE BECAUSE GM WILL NOT HELP WITH REPAIR.
Steering, Service brakes, Hydraulic, May 29, 2019
TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. WHILE DRIVING APPROXIMATELY 30 MPH, THE BRAKE PEDAL BECAME STUCK WITHOUT WARNING. THE VEHICLE WAS TOWED TO MARTIN CADILLAC (310-736-2266, LOCATED AT 12101 W OLYMPIC BLVD, LOS ANGELES, CA 90064). THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE CONTACT ALSO RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 18V586000 (STEERING). THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE FAILURE MILEAGE WAS 40,699.
Service brakes, May 28, 2019
BRAKE VACUUM PUMP: WHILE ATTEMPTING TO STOP, THE BRAKE PEDAL BECAME VERY FIRM AND THE VEHICLE WAS DIFFICULT TO STOP. THE VEHICLE CONTINUED TO MOVE WHILE DEPRESSING THE BRAKE PEDAL AND REQUIRED A SUBSTANTIAL AMOUNT OF EFFORT TO MAKE THE VEHICLE COME TO A STOP. IT WAS INTERMITTENT, BUT IT DID OCCUR SEVERAL TIMES ON THE DAY I FIRST NOTICED IT AND WAS OFTEN AT LOW SPEED. FORTUNATELY I WAS NOT INVOLVED IN ANY ACCIDENT WHEN THIS FIRST OCCURRED. I WAS ABLE TO DRIVE IT TO THE NEAREST DEALERSHIP IMMEDIATELY AND HAD IT REPAIRED THAT DAY. THE DEALER WAS ABLE TO DUPLICATE THE ISSUE AND DETERMINED THE VACUUM PUMP TO BE DEFECTIVE AND REQUIRED TO BE REPLACED. ONCE REPLACING THE VACUUM PUMP, THE BRAKES PERFORMED AS EXPECTED. ATTACHED IS A COPY OF MY INVOICE WITH THE DEALER NARRATIVE DESCRIBING THE REPAIR.